./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:24:51,596 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:24:51,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:24:51,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:24:51,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:24:51,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:24:51,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:24:51,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:24:51,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:24:51,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:24:51,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:24:51,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:24:51,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:24:51,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:24:51,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:24:51,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:24:51,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:24:51,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:24:51,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:24:51,703 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:24:51,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:24:51,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:24:51,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:24:51,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:24:51,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:24:51,722 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:24:51,722 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:24:51,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:24:51,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:24:51,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:24:51,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:24:51,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:24:51,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:24:51,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:24:51,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:24:51,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:24:51,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:24:51,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:24:51,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:24:51,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:24:51,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:24:51,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:24:51,785 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:24:51,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:24:51,786 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:24:51,786 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:24:51,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:24:51,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:24:51,788 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:24:51,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:24:51,789 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:24:51,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:24:51,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:24:51,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:24:51,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:24:51,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:24:51,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:24:51,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:24:51,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:24:51,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:24:51,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:24:51,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:24:51,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:24:51,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:24:51,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:24:51,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:24:51,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:24:51,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:24:51,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:24:51,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:24:51,796 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:24:51,796 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:24:51,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:24:51,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:24:51,798 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_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2021-11-02 22:24:52,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:24:52,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:24:52,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:24:52,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:24:52,223 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:24:52,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-11-02 22:24:52,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/data/c51070617/e8bac544040a4263869f65994f10e2f0/FLAGa2f4a2137 [2021-11-02 22:24:52,833 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:24:52,838 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/sv-benchmarks/c/weaver/test-easy11.wvr.c [2021-11-02 22:24:52,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/data/c51070617/e8bac544040a4263869f65994f10e2f0/FLAGa2f4a2137 [2021-11-02 22:24:53,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/data/c51070617/e8bac544040a4263869f65994f10e2f0 [2021-11-02 22:24:53,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:24:53,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:24:53,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:24:53,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:24:53,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:24:53,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c99efe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53, skipping insertion in model container [2021-11-02 22:24:53,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:24:53,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:24:53,465 WARN L228 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_f37cae56-0a4e-4033-a949-3e33cc7b47e3/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-11-02 22:24:53,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:24:53,486 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:24:53,548 WARN L228 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_f37cae56-0a4e-4033-a949-3e33cc7b47e3/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2021-11-02 22:24:53,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:24:53,573 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:24:53,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53 WrapperNode [2021-11-02 22:24:53,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:24:53,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:24:53,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:24:53,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:24:53,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:24:53,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:24:53,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:24:53,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:24:53,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:24:53,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:24:53,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:24:53,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:24:53,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (1/1) ... [2021-11-02 22:24:53,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:24:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:53,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:24:53,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:24:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-02 22:24:53,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-02 22:24:53,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-02 22:24:53,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-02 22:24:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:24:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:24:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:24:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-02 22:24:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-02 22:24:53,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:24:53,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:24:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:24:53,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:24:53,790 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-02 22:24:54,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:24:54,156 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:24:54,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:24:54 BoogieIcfgContainer [2021-11-02 22:24:54,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:24:54,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:24:54,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:24:54,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:24:54,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:24:53" (1/3) ... [2021-11-02 22:24:54,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a6b590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:24:54, skipping insertion in model container [2021-11-02 22:24:54,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:24:53" (2/3) ... [2021-11-02 22:24:54,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a6b590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:24:54, skipping insertion in model container [2021-11-02 22:24:54,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:24:54" (3/3) ... [2021-11-02 22:24:54,173 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2021-11-02 22:24:54,180 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 22:24:54,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:24:54,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:24:54,181 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 22:24:54,237 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,237 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,237 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,238 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,238 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,239 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,239 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,240 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,242 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,245 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,246 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,246 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,246 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,247 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,248 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,249 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,250 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,251 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,251 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,251 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,259 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,260 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,260 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,261 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,261 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,261 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,262 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,263 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,263 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,263 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,264 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,264 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,265 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,275 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,275 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,276 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,276 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,284 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,284 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,285 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~x~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,285 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:24:54,315 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-02 22:24:54,406 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:24:54,417 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:24:54,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:24:54,431 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2021-11-02 22:24:54,477 INFO L129 PetriNetUnfolder]: 6/77 cut-off events. [2021-11-02 22:24:54,478 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:24:54,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-11-02 22:24:54,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2021-11-02 22:24:54,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2021-11-02 22:24:54,510 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2021-11-02 22:24:54,510 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:24:54,511 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:54,511 INFO L254 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] [2021-11-02 22:24:54,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 494129406, now seen corresponding path program 1 times [2021-11-02 22:24:54,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:54,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329112343] [2021-11-02 22:24:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:54,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:54,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:54,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329112343] [2021-11-02 22:24:54,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329112343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:54,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:54,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:24:54,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715997702] [2021-11-02 22:24:54,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:24:54,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:24:54,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:24:54,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 79 [2021-11-02 22:24:54,783 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:54,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:54,784 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 79 [2021-11-02 22:24:54,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:54,835 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2021-11-02 22:24:54,835 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:24:54,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 2/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 4/65 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2021-11-02 22:24:54,837 INFO L132 encePairwiseOnDemand]: 75/79 looper letters, 0 selfloop transitions, 0 changer transitions 2/65 dead transitions. [2021-11-02 22:24:54,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 142 flow [2021-11-02 22:24:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:24:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-02 22:24:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-11-02 22:24:54,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9620253164556962 [2021-11-02 22:24:54,864 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-11-02 22:24:54,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-11-02 22:24:54,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:54,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-11-02 22:24:54,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:54,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:54,888 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:54,890 INFO L186 Difference]: Start difference. First operand has 70 places, 69 transitions, 150 flow. Second operand 2 states and 152 transitions. [2021-11-02 22:24:54,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 142 flow [2021-11-02 22:24:54,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 134 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-02 22:24:54,906 INFO L242 Difference]: Finished difference. Result has 67 places, 63 transitions, 130 flow [2021-11-02 22:24:54,908 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=130, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2021-11-02 22:24:54,908 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2021-11-02 22:24:54,909 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 130 flow [2021-11-02 22:24:54,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:54,909 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:54,909 INFO L254 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] [2021-11-02 22:24:54,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:24:54,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:54,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1302821953, now seen corresponding path program 1 times [2021-11-02 22:24:54,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:54,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387228306] [2021-11-02 22:24:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:54,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:55,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:55,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387228306] [2021-11-02 22:24:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387228306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:55,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:55,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:55,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368852911] [2021-11-02 22:24:55,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:55,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:55,512 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:55,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 130 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:55,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:55,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:55,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:55,982 INFO L129 PetriNetUnfolder]: 86/316 cut-off events. [2021-11-02 22:24:55,982 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:24:55,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 316 events. 86/316 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1511 event pairs, 21 based on Foata normal form. 1/284 useless extension candidates. Maximal degree in co-relation 516. Up to 54 conditions per place. [2021-11-02 22:24:55,987 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 56 selfloop transitions, 16 changer transitions 5/113 dead transitions. [2021-11-02 22:24:55,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 388 flow [2021-11-02 22:24:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 708 transitions. [2021-11-02 22:24:55,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6401446654611211 [2021-11-02 22:24:55,996 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 708 transitions. [2021-11-02 22:24:55,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 708 transitions. [2021-11-02 22:24:55,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:55,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 708 transitions. [2021-11-02 22:24:56,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,009 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,009 INFO L186 Difference]: Start difference. First operand has 67 places, 63 transitions, 130 flow. Second operand 14 states and 708 transitions. [2021-11-02 22:24:56,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 388 flow [2021-11-02 22:24:56,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-02 22:24:56,014 INFO L242 Difference]: Finished difference. Result has 85 places, 75 transitions, 227 flow [2021-11-02 22:24:56,014 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=227, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2021-11-02 22:24:56,015 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2021-11-02 22:24:56,015 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 227 flow [2021-11-02 22:24:56,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,016 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:56,017 INFO L254 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] [2021-11-02 22:24:56,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:24:56,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1301296059, now seen corresponding path program 2 times [2021-11-02 22:24:56,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:56,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410013137] [2021-11-02 22:24:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:56,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:56,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:56,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410013137] [2021-11-02 22:24:56,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410013137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:56,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:56,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:56,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951361502] [2021-11-02 22:24:56,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:56,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:56,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:56,476 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:56,478 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 227 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,478 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:56,478 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:56,478 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:56,823 INFO L129 PetriNetUnfolder]: 116/354 cut-off events. [2021-11-02 22:24:56,824 INFO L130 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2021-11-02 22:24:56,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 354 events. 116/354 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1585 event pairs, 28 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 824. Up to 76 conditions per place. [2021-11-02 22:24:56,840 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 56 selfloop transitions, 25 changer transitions 5/122 dead transitions. [2021-11-02 22:24:56,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 588 flow [2021-11-02 22:24:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 701 transitions. [2021-11-02 22:24:56,845 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6338155515370705 [2021-11-02 22:24:56,845 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 701 transitions. [2021-11-02 22:24:56,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 701 transitions. [2021-11-02 22:24:56,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:56,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 701 transitions. [2021-11-02 22:24:56,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.07142857142857) internal successors, (701), 14 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,856 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,856 INFO L186 Difference]: Start difference. First operand has 85 places, 75 transitions, 227 flow. Second operand 14 states and 701 transitions. [2021-11-02 22:24:56,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 588 flow [2021-11-02 22:24:56,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 572 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-11-02 22:24:56,874 INFO L242 Difference]: Finished difference. Result has 96 places, 91 transitions, 388 flow [2021-11-02 22:24:56,875 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=388, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2021-11-02 22:24:56,875 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-11-02 22:24:56,875 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 388 flow [2021-11-02 22:24:56,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:56,876 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:56,877 INFO L254 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] [2021-11-02 22:24:56,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:24:56,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 396679871, now seen corresponding path program 3 times [2021-11-02 22:24:56,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:56,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725191179] [2021-11-02 22:24:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:56,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:57,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:57,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725191179] [2021-11-02 22:24:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725191179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:57,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:57,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:57,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951008119] [2021-11-02 22:24:57,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:57,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:57,274 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:57,275 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 388 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:57,276 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:57,276 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:57,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:57,589 INFO L129 PetriNetUnfolder]: 120/358 cut-off events. [2021-11-02 22:24:57,589 INFO L130 PetriNetUnfolder]: For 361/363 co-relation queries the response was YES. [2021-11-02 22:24:57,591 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 358 events. 120/358 cut-off events. For 361/363 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1649 event pairs, 25 based on Foata normal form. 3/357 useless extension candidates. Maximal degree in co-relation 1057. Up to 80 conditions per place. [2021-11-02 22:24:57,597 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 58 selfloop transitions, 30 changer transitions 5/129 dead transitions. [2021-11-02 22:24:57,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 129 transitions, 756 flow [2021-11-02 22:24:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 703 transitions. [2021-11-02 22:24:57,602 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.635623869801085 [2021-11-02 22:24:57,603 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 703 transitions. [2021-11-02 22:24:57,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 703 transitions. [2021-11-02 22:24:57,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:57,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 703 transitions. [2021-11-02 22:24:57,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.214285714285715) internal successors, (703), 14 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:57,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:57,611 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:57,612 INFO L186 Difference]: Start difference. First operand has 96 places, 91 transitions, 388 flow. Second operand 14 states and 703 transitions. [2021-11-02 22:24:57,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 129 transitions, 756 flow [2021-11-02 22:24:57,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 129 transitions, 698 flow, removed 17 selfloop flow, removed 8 redundant places. [2021-11-02 22:24:57,653 INFO L242 Difference]: Finished difference. Result has 103 places, 96 transitions, 473 flow [2021-11-02 22:24:57,654 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=473, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2021-11-02 22:24:57,654 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 33 predicate places. [2021-11-02 22:24:57,654 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 473 flow [2021-11-02 22:24:57,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:57,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:57,655 INFO L254 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] [2021-11-02 22:24:57,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:24:57,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash 431873009, now seen corresponding path program 4 times [2021-11-02 22:24:57,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:57,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895286983] [2021-11-02 22:24:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:57,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:58,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:58,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895286983] [2021-11-02 22:24:58,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895286983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:58,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:58,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:58,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794977676] [2021-11-02 22:24:58,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:58,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:58,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:58,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 96 transitions, 473 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:58,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:58,038 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:58,442 INFO L129 PetriNetUnfolder]: 142/379 cut-off events. [2021-11-02 22:24:58,443 INFO L130 PetriNetUnfolder]: For 682/682 co-relation queries the response was YES. [2021-11-02 22:24:58,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 379 events. 142/379 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1636 event pairs, 30 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 1268. Up to 85 conditions per place. [2021-11-02 22:24:58,449 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 56 selfloop transitions, 38 changer transitions 5/135 dead transitions. [2021-11-02 22:24:58,450 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 135 transitions, 897 flow [2021-11-02 22:24:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 705 transitions. [2021-11-02 22:24:58,454 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374321880650995 [2021-11-02 22:24:58,455 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 705 transitions. [2021-11-02 22:24:58,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 705 transitions. [2021-11-02 22:24:58,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:58,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 705 transitions. [2021-11-02 22:24:58,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.357142857142854) internal successors, (705), 14 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,467 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,467 INFO L186 Difference]: Start difference. First operand has 103 places, 96 transitions, 473 flow. Second operand 14 states and 705 transitions. [2021-11-02 22:24:58,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 135 transitions, 897 flow [2021-11-02 22:24:58,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 135 transitions, 801 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-11-02 22:24:58,484 INFO L242 Difference]: Finished difference. Result has 108 places, 107 transitions, 625 flow [2021-11-02 22:24:58,484 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=625, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2021-11-02 22:24:58,485 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 38 predicate places. [2021-11-02 22:24:58,485 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 625 flow [2021-11-02 22:24:58,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,486 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:58,486 INFO L254 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] [2021-11-02 22:24:58,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:24:58,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:58,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:58,488 INFO L85 PathProgramCache]: Analyzing trace with hash 697788169, now seen corresponding path program 5 times [2021-11-02 22:24:58,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:58,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849509628] [2021-11-02 22:24:58,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:58,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:58,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:58,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849509628] [2021-11-02 22:24:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849509628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:58,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:58,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913972375] [2021-11-02 22:24:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:58,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:58,846 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 625 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:58,846 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:58,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:58,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:59,165 INFO L129 PetriNetUnfolder]: 143/395 cut-off events. [2021-11-02 22:24:59,166 INFO L130 PetriNetUnfolder]: For 909/913 co-relation queries the response was YES. [2021-11-02 22:24:59,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 395 events. 143/395 cut-off events. For 909/913 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1839 event pairs, 30 based on Foata normal form. 3/394 useless extension candidates. Maximal degree in co-relation 1388. Up to 88 conditions per place. [2021-11-02 22:24:59,173 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 62 selfloop transitions, 37 changer transitions 6/141 dead transitions. [2021-11-02 22:24:59,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 141 transitions, 1013 flow [2021-11-02 22:24:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 702 transitions. [2021-11-02 22:24:59,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6347197106690777 [2021-11-02 22:24:59,178 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 702 transitions. [2021-11-02 22:24:59,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 702 transitions. [2021-11-02 22:24:59,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:59,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 702 transitions. [2021-11-02 22:24:59,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.142857142857146) internal successors, (702), 14 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,186 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,187 INFO L186 Difference]: Start difference. First operand has 108 places, 107 transitions, 625 flow. Second operand 14 states and 702 transitions. [2021-11-02 22:24:59,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 141 transitions, 1013 flow [2021-11-02 22:24:59,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 943 flow, removed 12 selfloop flow, removed 9 redundant places. [2021-11-02 22:24:59,199 INFO L242 Difference]: Finished difference. Result has 112 places, 105 transitions, 633 flow [2021-11-02 22:24:59,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=633, PETRI_PLACES=112, PETRI_TRANSITIONS=105} [2021-11-02 22:24:59,200 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 42 predicate places. [2021-11-02 22:24:59,200 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 105 transitions, 633 flow [2021-11-02 22:24:59,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,201 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:59,201 INFO L254 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] [2021-11-02 22:24:59,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:24:59,202 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:59,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1296944901, now seen corresponding path program 6 times [2021-11-02 22:24:59,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:59,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486103453] [2021-11-02 22:24:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:59,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:24:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:24:59,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:24:59,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486103453] [2021-11-02 22:24:59,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486103453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:24:59,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:24:59,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:24:59,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892248190] [2021-11-02 22:24:59,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:24:59,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:24:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:24:59,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:24:59,465 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:24:59,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 105 transitions, 633 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:24:59,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:24:59,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:24:59,880 INFO L129 PetriNetUnfolder]: 159/424 cut-off events. [2021-11-02 22:24:59,880 INFO L130 PetriNetUnfolder]: For 1294/1296 co-relation queries the response was YES. [2021-11-02 22:24:59,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 424 events. 159/424 cut-off events. For 1294/1296 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1962 event pairs, 32 based on Foata normal form. 3/420 useless extension candidates. Maximal degree in co-relation 1555. Up to 105 conditions per place. [2021-11-02 22:24:59,889 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 59 selfloop transitions, 43 changer transitions 5/143 dead transitions. [2021-11-02 22:24:59,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 143 transitions, 1084 flow [2021-11-02 22:24:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:24:59,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:24:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 705 transitions. [2021-11-02 22:24:59,893 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374321880650995 [2021-11-02 22:24:59,894 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 705 transitions. [2021-11-02 22:24:59,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 705 transitions. [2021-11-02 22:24:59,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:24:59,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 705 transitions. [2021-11-02 22:24:59,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.357142857142854) internal successors, (705), 14 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,902 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,902 INFO L186 Difference]: Start difference. First operand has 112 places, 105 transitions, 633 flow. Second operand 14 states and 705 transitions. [2021-11-02 22:24:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 143 transitions, 1084 flow [2021-11-02 22:24:59,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 143 transitions, 980 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-11-02 22:24:59,915 INFO L242 Difference]: Finished difference. Result has 114 places, 114 transitions, 783 flow [2021-11-02 22:24:59,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=783, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2021-11-02 22:24:59,916 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 44 predicate places. [2021-11-02 22:24:59,916 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 783 flow [2021-11-02 22:24:59,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:59,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:24:59,917 INFO L254 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] [2021-11-02 22:24:59,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:24:59,918 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:24:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:59,918 INFO L85 PathProgramCache]: Analyzing trace with hash 333932863, now seen corresponding path program 7 times [2021-11-02 22:24:59,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:59,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746435850] [2021-11-02 22:24:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:59,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:00,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:00,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746435850] [2021-11-02 22:25:00,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746435850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:00,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:00,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112903355] [2021-11-02 22:25:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:00,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:00,136 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:00,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 783 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:00,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:00,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:00,413 INFO L129 PetriNetUnfolder]: 159/443 cut-off events. [2021-11-02 22:25:00,413 INFO L130 PetriNetUnfolder]: For 1498/1504 co-relation queries the response was YES. [2021-11-02 22:25:00,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1698 conditions, 443 events. 159/443 cut-off events. For 1498/1504 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2171 event pairs, 30 based on Foata normal form. 5/444 useless extension candidates. Maximal degree in co-relation 1673. Up to 101 conditions per place. [2021-11-02 22:25:00,421 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 67 selfloop transitions, 44 changer transitions 5/152 dead transitions. [2021-11-02 22:25:00,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 152 transitions, 1217 flow [2021-11-02 22:25:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 704 transitions. [2021-11-02 22:25:00,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365280289330922 [2021-11-02 22:25:00,426 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 704 transitions. [2021-11-02 22:25:00,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 704 transitions. [2021-11-02 22:25:00,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:00,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 704 transitions. [2021-11-02 22:25:00,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.285714285714285) internal successors, (704), 14 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,435 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,435 INFO L186 Difference]: Start difference. First operand has 114 places, 114 transitions, 783 flow. Second operand 14 states and 704 transitions. [2021-11-02 22:25:00,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 152 transitions, 1217 flow [2021-11-02 22:25:00,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1131 flow, removed 20 selfloop flow, removed 9 redundant places. [2021-11-02 22:25:00,451 INFO L242 Difference]: Finished difference. Result has 119 places, 115 transitions, 819 flow [2021-11-02 22:25:00,452 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=819, PETRI_PLACES=119, PETRI_TRANSITIONS=115} [2021-11-02 22:25:00,452 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 49 predicate places. [2021-11-02 22:25:00,453 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 115 transitions, 819 flow [2021-11-02 22:25:00,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,453 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:00,454 INFO L254 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] [2021-11-02 22:25:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:25:00,454 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 448590981, now seen corresponding path program 8 times [2021-11-02 22:25:00,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:00,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536043394] [2021-11-02 22:25:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:00,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:00,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:00,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536043394] [2021-11-02 22:25:00,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536043394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:00,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:00,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:00,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805364707] [2021-11-02 22:25:00,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:00,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:00,693 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:00,695 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 115 transitions, 819 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:00,695 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:00,695 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:00,695 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:01,038 INFO L129 PetriNetUnfolder]: 158/438 cut-off events. [2021-11-02 22:25:01,038 INFO L130 PetriNetUnfolder]: For 1644/1648 co-relation queries the response was YES. [2021-11-02 22:25:01,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 438 events. 158/438 cut-off events. For 1644/1648 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2156 event pairs, 24 based on Foata normal form. 3/436 useless extension candidates. Maximal degree in co-relation 1689. Up to 105 conditions per place. [2021-11-02 22:25:01,046 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 60 selfloop transitions, 44 changer transitions 5/145 dead transitions. [2021-11-02 22:25:01,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 145 transitions, 1187 flow [2021-11-02 22:25:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 706 transitions. [2021-11-02 22:25:01,052 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383363471971067 [2021-11-02 22:25:01,052 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 706 transitions. [2021-11-02 22:25:01,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 706 transitions. [2021-11-02 22:25:01,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:01,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 706 transitions. [2021-11-02 22:25:01,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.42857142857143) internal successors, (706), 14 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,061 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,061 INFO L186 Difference]: Start difference. First operand has 119 places, 115 transitions, 819 flow. Second operand 14 states and 706 transitions. [2021-11-02 22:25:01,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 145 transitions, 1187 flow [2021-11-02 22:25:01,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 145 transitions, 1083 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:01,078 INFO L242 Difference]: Finished difference. Result has 122 places, 117 transitions, 864 flow [2021-11-02 22:25:01,079 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=864, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2021-11-02 22:25:01,080 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2021-11-02 22:25:01,080 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 864 flow [2021-11-02 22:25:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,081 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:01,081 INFO L254 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] [2021-11-02 22:25:01,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:25:01,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:01,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1585647665, now seen corresponding path program 9 times [2021-11-02 22:25:01,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:01,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776589118] [2021-11-02 22:25:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:01,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:01,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:01,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776589118] [2021-11-02 22:25:01,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776589118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:01,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:01,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723408990] [2021-11-02 22:25:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:01,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:01,288 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:01,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 864 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:01,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:01,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:01,672 INFO L129 PetriNetUnfolder]: 157/435 cut-off events. [2021-11-02 22:25:01,672 INFO L130 PetriNetUnfolder]: For 1779/1783 co-relation queries the response was YES. [2021-11-02 22:25:01,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1741 conditions, 435 events. 157/435 cut-off events. For 1779/1783 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2123 event pairs, 24 based on Foata normal form. 3/433 useless extension candidates. Maximal degree in co-relation 1713. Up to 105 conditions per place. [2021-11-02 22:25:01,681 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 60 selfloop transitions, 42 changer transitions 6/144 dead transitions. [2021-11-02 22:25:01,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 144 transitions, 1191 flow [2021-11-02 22:25:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 705 transitions. [2021-11-02 22:25:01,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374321880650995 [2021-11-02 22:25:01,684 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 705 transitions. [2021-11-02 22:25:01,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 705 transitions. [2021-11-02 22:25:01,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:01,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 705 transitions. [2021-11-02 22:25:01,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.357142857142854) internal successors, (705), 14 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,694 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,694 INFO L186 Difference]: Start difference. First operand has 122 places, 117 transitions, 864 flow. Second operand 14 states and 705 transitions. [2021-11-02 22:25:01,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 144 transitions, 1191 flow [2021-11-02 22:25:01,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 144 transitions, 1097 flow, removed 12 selfloop flow, removed 10 redundant places. [2021-11-02 22:25:01,709 INFO L242 Difference]: Finished difference. Result has 125 places, 115 transitions, 840 flow [2021-11-02 22:25:01,711 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=840, PETRI_PLACES=125, PETRI_TRANSITIONS=115} [2021-11-02 22:25:01,711 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2021-11-02 22:25:01,711 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 115 transitions, 840 flow [2021-11-02 22:25:01,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,712 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:01,712 INFO L254 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] [2021-11-02 22:25:01,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:25:01,713 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1272097097, now seen corresponding path program 10 times [2021-11-02 22:25:01,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:01,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362959908] [2021-11-02 22:25:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:01,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:01,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:01,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362959908] [2021-11-02 22:25:01,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362959908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:01,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:01,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:01,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118619734] [2021-11-02 22:25:01,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:01,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:01,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:01,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:01,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:01,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 115 transitions, 840 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:01,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:01,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:01,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:02,312 INFO L129 PetriNetUnfolder]: 157/441 cut-off events. [2021-11-02 22:25:02,313 INFO L130 PetriNetUnfolder]: For 1827/1831 co-relation queries the response was YES. [2021-11-02 22:25:02,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1735 conditions, 441 events. 157/441 cut-off events. For 1827/1831 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2200 event pairs, 26 based on Foata normal form. 3/439 useless extension candidates. Maximal degree in co-relation 1707. Up to 105 conditions per place. [2021-11-02 22:25:02,321 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 63 selfloop transitions, 43 changer transitions 5/147 dead transitions. [2021-11-02 22:25:02,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 1190 flow [2021-11-02 22:25:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:02,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 707 transitions. [2021-11-02 22:25:02,324 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392405063291139 [2021-11-02 22:25:02,325 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:02,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.5) internal successors, (707), 14 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,331 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,332 INFO L186 Difference]: Start difference. First operand has 125 places, 115 transitions, 840 flow. Second operand 14 states and 707 transitions. [2021-11-02 22:25:02,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 1190 flow [2021-11-02 22:25:02,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1092 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:02,347 INFO L242 Difference]: Finished difference. Result has 125 places, 117 transitions, 858 flow [2021-11-02 22:25:02,347 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2021-11-02 22:25:02,348 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 55 predicate places. [2021-11-02 22:25:02,348 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 858 flow [2021-11-02 22:25:02,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:02,349 INFO L254 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] [2021-11-02 22:25:02,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:25:02,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1732917051, now seen corresponding path program 11 times [2021-11-02 22:25:02,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:02,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183729386] [2021-11-02 22:25:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:02,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:02,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:02,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183729386] [2021-11-02 22:25:02,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183729386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:02,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:02,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:02,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490808525] [2021-11-02 22:25:02,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:02,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:02,574 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:02,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:02,575 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:02,575 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:02,935 INFO L129 PetriNetUnfolder]: 157/470 cut-off events. [2021-11-02 22:25:02,935 INFO L130 PetriNetUnfolder]: For 1823/1825 co-relation queries the response was YES. [2021-11-02 22:25:02,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1781 conditions, 470 events. 157/470 cut-off events. For 1823/1825 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2488 event pairs, 30 based on Foata normal form. 3/466 useless extension candidates. Maximal degree in co-relation 1752. Up to 105 conditions per place. [2021-11-02 22:25:02,945 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 64 selfloop transitions, 43 changer transitions 5/148 dead transitions. [2021-11-02 22:25:02,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 148 transitions, 1217 flow [2021-11-02 22:25:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 707 transitions. [2021-11-02 22:25:02,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392405063291139 [2021-11-02 22:25:02,948 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:02,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 707 transitions. [2021-11-02 22:25:02,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.5) internal successors, (707), 14 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,955 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,955 INFO L186 Difference]: Start difference. First operand has 125 places, 117 transitions, 858 flow. Second operand 14 states and 707 transitions. [2021-11-02 22:25:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 148 transitions, 1217 flow [2021-11-02 22:25:02,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 148 transitions, 1119 flow, removed 8 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:02,979 INFO L242 Difference]: Finished difference. Result has 127 places, 118 transitions, 872 flow [2021-11-02 22:25:02,979 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=872, PETRI_PLACES=127, PETRI_TRANSITIONS=118} [2021-11-02 22:25:02,980 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2021-11-02 22:25:02,980 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 118 transitions, 872 flow [2021-11-02 22:25:02,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:02,981 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:02,981 INFO L254 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] [2021-11-02 22:25:02,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:25:02,982 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2102717425, now seen corresponding path program 12 times [2021-11-02 22:25:02,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:02,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776650255] [2021-11-02 22:25:02,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:02,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:03,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:03,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776650255] [2021-11-02 22:25:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776650255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:03,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:03,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:25:03,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10854007] [2021-11-02 22:25:03,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:25:03,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:25:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:25:03,237 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:03,238 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 118 transitions, 872 flow. Second operand has 15 states, 15 states have (on average 46.4) internal successors, (696), 15 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,238 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:03,238 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:03,238 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:03,612 INFO L129 PetriNetUnfolder]: 154/451 cut-off events. [2021-11-02 22:25:03,612 INFO L130 PetriNetUnfolder]: For 1904/1904 co-relation queries the response was YES. [2021-11-02 22:25:03,616 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 451 events. 154/451 cut-off events. For 1904/1904 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2274 event pairs, 32 based on Foata normal form. 1/445 useless extension candidates. Maximal degree in co-relation 1729. Up to 105 conditions per place. [2021-11-02 22:25:03,621 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 62 selfloop transitions, 40 changer transitions 6/144 dead transitions. [2021-11-02 22:25:03,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 144 transitions, 1200 flow [2021-11-02 22:25:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 703 transitions. [2021-11-02 22:25:03,624 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.635623869801085 [2021-11-02 22:25:03,625 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 703 transitions. [2021-11-02 22:25:03,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 703 transitions. [2021-11-02 22:25:03,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:03,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 703 transitions. [2021-11-02 22:25:03,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.214285714285715) internal successors, (703), 14 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,631 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,631 INFO L186 Difference]: Start difference. First operand has 127 places, 118 transitions, 872 flow. Second operand 14 states and 703 transitions. [2021-11-02 22:25:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 144 transitions, 1200 flow [2021-11-02 22:25:03,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 144 transitions, 1098 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:03,670 INFO L242 Difference]: Finished difference. Result has 127 places, 115 transitions, 829 flow [2021-11-02 22:25:03,671 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=829, PETRI_PLACES=127, PETRI_TRANSITIONS=115} [2021-11-02 22:25:03,671 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2021-11-02 22:25:03,671 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 829 flow [2021-11-02 22:25:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.4) internal successors, (696), 15 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:03,672 INFO L254 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] [2021-11-02 22:25:03,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:25:03,673 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2095086213, now seen corresponding path program 13 times [2021-11-02 22:25:03,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:03,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378976282] [2021-11-02 22:25:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:03,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:03,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:03,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378976282] [2021-11-02 22:25:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378976282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:03,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:03,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:03,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464274345] [2021-11-02 22:25:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:03,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:03,896 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 115 transitions, 829 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:03,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:03,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:03,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:04,233 INFO L129 PetriNetUnfolder]: 155/452 cut-off events. [2021-11-02 22:25:04,234 INFO L130 PetriNetUnfolder]: For 1855/1859 co-relation queries the response was YES. [2021-11-02 22:25:04,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 452 events. 155/452 cut-off events. For 1855/1859 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2279 event pairs, 34 based on Foata normal form. 3/447 useless extension candidates. Maximal degree in co-relation 1727. Up to 98 conditions per place. [2021-11-02 22:25:04,244 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 61 selfloop transitions, 42 changer transitions 5/144 dead transitions. [2021-11-02 22:25:04,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 144 transitions, 1196 flow [2021-11-02 22:25:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 704 transitions. [2021-11-02 22:25:04,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365280289330922 [2021-11-02 22:25:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 704 transitions. [2021-11-02 22:25:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 704 transitions. [2021-11-02 22:25:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 704 transitions. [2021-11-02 22:25:04,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.285714285714285) internal successors, (704), 14 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,256 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,256 INFO L186 Difference]: Start difference. First operand has 127 places, 115 transitions, 829 flow. Second operand 14 states and 704 transitions. [2021-11-02 22:25:04,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 144 transitions, 1196 flow [2021-11-02 22:25:04,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 144 transitions, 1098 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-11-02 22:25:04,271 INFO L242 Difference]: Finished difference. Result has 129 places, 117 transitions, 875 flow [2021-11-02 22:25:04,271 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=875, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2021-11-02 22:25:04,272 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 59 predicate places. [2021-11-02 22:25:04,272 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 875 flow [2021-11-02 22:25:04,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,273 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:04,273 INFO L254 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] [2021-11-02 22:25:04,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:25:04,274 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:04,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2068821629, now seen corresponding path program 14 times [2021-11-02 22:25:04,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:04,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760969229] [2021-11-02 22:25:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:04,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:04,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:04,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760969229] [2021-11-02 22:25:04,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760969229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:04,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:04,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:25:04,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796670832] [2021-11-02 22:25:04,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:25:04,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:04,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:25:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:25:04,537 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:04,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 875 flow. Second operand has 15 states, 15 states have (on average 46.4) internal successors, (696), 15 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:04,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:04,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:04,976 INFO L129 PetriNetUnfolder]: 155/467 cut-off events. [2021-11-02 22:25:04,976 INFO L130 PetriNetUnfolder]: For 1883/1885 co-relation queries the response was YES. [2021-11-02 22:25:04,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 467 events. 155/467 cut-off events. For 1883/1885 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2444 event pairs, 38 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 1786. Up to 94 conditions per place. [2021-11-02 22:25:04,986 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 73 selfloop transitions, 40 changer transitions 5/154 dead transitions. [2021-11-02 22:25:04,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 154 transitions, 1296 flow [2021-11-02 22:25:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 705 transitions. [2021-11-02 22:25:04,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6374321880650995 [2021-11-02 22:25:04,991 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 705 transitions. [2021-11-02 22:25:04,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 705 transitions. [2021-11-02 22:25:04,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:04,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 705 transitions. [2021-11-02 22:25:04,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.357142857142854) internal successors, (705), 14 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,998 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:04,998 INFO L186 Difference]: Start difference. First operand has 129 places, 117 transitions, 875 flow. Second operand 14 states and 705 transitions. [2021-11-02 22:25:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 154 transitions, 1296 flow [2021-11-02 22:25:05,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 154 transitions, 1215 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-11-02 22:25:05,015 INFO L242 Difference]: Finished difference. Result has 134 places, 120 transitions, 923 flow [2021-11-02 22:25:05,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=923, PETRI_PLACES=134, PETRI_TRANSITIONS=120} [2021-11-02 22:25:05,016 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 64 predicate places. [2021-11-02 22:25:05,016 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 120 transitions, 923 flow [2021-11-02 22:25:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.4) internal successors, (696), 15 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,017 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:05,017 INFO L254 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] [2021-11-02 22:25:05,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:25:05,018 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:05,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164739, now seen corresponding path program 15 times [2021-11-02 22:25:05,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:05,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853409717] [2021-11-02 22:25:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:05,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:05,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:05,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853409717] [2021-11-02 22:25:05,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853409717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:05,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:05,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:05,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853638486] [2021-11-02 22:25:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:05,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:05,306 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:05,307 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 120 transitions, 923 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:05,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:05,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:05,693 INFO L129 PetriNetUnfolder]: 155/479 cut-off events. [2021-11-02 22:25:05,694 INFO L130 PetriNetUnfolder]: For 2006/2008 co-relation queries the response was YES. [2021-11-02 22:25:05,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 479 events. 155/479 cut-off events. For 2006/2008 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2582 event pairs, 38 based on Foata normal form. 1/472 useless extension candidates. Maximal degree in co-relation 1838. Up to 104 conditions per place. [2021-11-02 22:25:05,704 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 71 selfloop transitions, 41 changer transitions 5/153 dead transitions. [2021-11-02 22:25:05,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 153 transitions, 1336 flow [2021-11-02 22:25:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 704 transitions. [2021-11-02 22:25:05,711 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365280289330922 [2021-11-02 22:25:05,711 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 704 transitions. [2021-11-02 22:25:05,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 704 transitions. [2021-11-02 22:25:05,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:05,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 704 transitions. [2021-11-02 22:25:05,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.285714285714285) internal successors, (704), 14 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,718 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,719 INFO L186 Difference]: Start difference. First operand has 134 places, 120 transitions, 923 flow. Second operand 14 states and 704 transitions. [2021-11-02 22:25:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 153 transitions, 1336 flow [2021-11-02 22:25:05,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 153 transitions, 1243 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-11-02 22:25:05,740 INFO L242 Difference]: Finished difference. Result has 137 places, 122 transitions, 952 flow [2021-11-02 22:25:05,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=952, PETRI_PLACES=137, PETRI_TRANSITIONS=122} [2021-11-02 22:25:05,740 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 67 predicate places. [2021-11-02 22:25:05,741 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 122 transitions, 952 flow [2021-11-02 22:25:05,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,742 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:05,742 INFO L254 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] [2021-11-02 22:25:05,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:25:05,743 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1698591429, now seen corresponding path program 16 times [2021-11-02 22:25:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:05,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462176675] [2021-11-02 22:25:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:05,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:05,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:05,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462176675] [2021-11-02 22:25:05,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462176675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:05,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:05,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:05,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250731450] [2021-11-02 22:25:05,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:05,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:05,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:05,970 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:05,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 122 transitions, 952 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:05,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:05,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:05,972 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:06,292 INFO L129 PetriNetUnfolder]: 156/497 cut-off events. [2021-11-02 22:25:06,292 INFO L130 PetriNetUnfolder]: For 2101/2105 co-relation queries the response was YES. [2021-11-02 22:25:06,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1929 conditions, 497 events. 156/497 cut-off events. For 2101/2105 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2749 event pairs, 38 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 1894. Up to 112 conditions per place. [2021-11-02 22:25:06,303 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 69 selfloop transitions, 38 changer transitions 6/149 dead transitions. [2021-11-02 22:25:06,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 149 transitions, 1327 flow [2021-11-02 22:25:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 700 transitions. [2021-11-02 22:25:06,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6329113924050633 [2021-11-02 22:25:06,306 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 700 transitions. [2021-11-02 22:25:06,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 700 transitions. [2021-11-02 22:25:06,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:06,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 700 transitions. [2021-11-02 22:25:06,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.0) internal successors, (700), 14 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,313 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,313 INFO L186 Difference]: Start difference. First operand has 137 places, 122 transitions, 952 flow. Second operand 14 states and 700 transitions. [2021-11-02 22:25:06,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 149 transitions, 1327 flow [2021-11-02 22:25:06,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 149 transitions, 1231 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:06,332 INFO L242 Difference]: Finished difference. Result has 137 places, 119 transitions, 907 flow [2021-11-02 22:25:06,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=907, PETRI_PLACES=137, PETRI_TRANSITIONS=119} [2021-11-02 22:25:06,333 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 67 predicate places. [2021-11-02 22:25:06,333 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 119 transitions, 907 flow [2021-11-02 22:25:06,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:06,334 INFO L254 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] [2021-11-02 22:25:06,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:25:06,335 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1056429701, now seen corresponding path program 17 times [2021-11-02 22:25:06,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:06,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987470549] [2021-11-02 22:25:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:06,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:06,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:06,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987470549] [2021-11-02 22:25:06,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987470549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:06,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:06,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:06,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710136315] [2021-11-02 22:25:06,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:06,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:06,562 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:06,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 119 transitions, 907 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:06,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:06,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:06,943 INFO L129 PetriNetUnfolder]: 155/494 cut-off events. [2021-11-02 22:25:06,943 INFO L130 PetriNetUnfolder]: For 2087/2091 co-relation queries the response was YES. [2021-11-02 22:25:06,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 494 events. 155/494 cut-off events. For 2087/2091 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2752 event pairs, 32 based on Foata normal form. 3/489 useless extension candidates. Maximal degree in co-relation 1879. Up to 108 conditions per place. [2021-11-02 22:25:06,951 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 68 selfloop transitions, 40 changer transitions 5/149 dead transitions. [2021-11-02 22:25:06,952 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 149 transitions, 1286 flow [2021-11-02 22:25:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:06,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 707 transitions. [2021-11-02 22:25:06,954 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392405063291139 [2021-11-02 22:25:06,954 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 707 transitions. [2021-11-02 22:25:06,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 707 transitions. [2021-11-02 22:25:06,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:06,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 707 transitions. [2021-11-02 22:25:06,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.5) internal successors, (707), 14 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,960 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:06,960 INFO L186 Difference]: Start difference. First operand has 137 places, 119 transitions, 907 flow. Second operand 14 states and 707 transitions. [2021-11-02 22:25:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 149 transitions, 1286 flow [2021-11-02 22:25:07,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 149 transitions, 1196 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-11-02 22:25:07,005 INFO L242 Difference]: Finished difference. Result has 138 places, 120 transitions, 927 flow [2021-11-02 22:25:07,005 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=927, PETRI_PLACES=138, PETRI_TRANSITIONS=120} [2021-11-02 22:25:07,006 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 68 predicate places. [2021-11-02 22:25:07,006 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 120 transitions, 927 flow [2021-11-02 22:25:07,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,007 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:07,007 INFO L254 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] [2021-11-02 22:25:07,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:25:07,008 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1210358831, now seen corresponding path program 18 times [2021-11-02 22:25:07,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:07,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569964980] [2021-11-02 22:25:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:07,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:07,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:07,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569964980] [2021-11-02 22:25:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569964980] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:07,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:07,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:07,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584773667] [2021-11-02 22:25:07,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:07,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:07,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:07,196 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:07,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 120 transitions, 927 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:07,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:07,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:07,539 INFO L129 PetriNetUnfolder]: 154/495 cut-off events. [2021-11-02 22:25:07,539 INFO L130 PetriNetUnfolder]: For 2217/2221 co-relation queries the response was YES. [2021-11-02 22:25:07,543 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1925 conditions, 495 events. 154/495 cut-off events. For 2217/2221 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2781 event pairs, 32 based on Foata normal form. 3/490 useless extension candidates. Maximal degree in co-relation 1889. Up to 112 conditions per place. [2021-11-02 22:25:07,549 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 66 selfloop transitions, 38 changer transitions 6/146 dead transitions. [2021-11-02 22:25:07,549 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 146 transitions, 1277 flow [2021-11-02 22:25:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 704 transitions. [2021-11-02 22:25:07,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365280289330922 [2021-11-02 22:25:07,552 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 704 transitions. [2021-11-02 22:25:07,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 704 transitions. [2021-11-02 22:25:07,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:07,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 704 transitions. [2021-11-02 22:25:07,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.285714285714285) internal successors, (704), 14 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,557 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,557 INFO L186 Difference]: Start difference. First operand has 138 places, 120 transitions, 927 flow. Second operand 14 states and 704 transitions. [2021-11-02 22:25:07,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 146 transitions, 1277 flow [2021-11-02 22:25:07,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 146 transitions, 1179 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:07,574 INFO L242 Difference]: Finished difference. Result has 139 places, 118 transitions, 891 flow [2021-11-02 22:25:07,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=891, PETRI_PLACES=139, PETRI_TRANSITIONS=118} [2021-11-02 22:25:07,575 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 69 predicate places. [2021-11-02 22:25:07,576 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 118 transitions, 891 flow [2021-11-02 22:25:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:07,576 INFO L254 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] [2021-11-02 22:25:07,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:25:07,577 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:07,578 INFO L85 PathProgramCache]: Analyzing trace with hash 165642437, now seen corresponding path program 19 times [2021-11-02 22:25:07,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:07,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657635082] [2021-11-02 22:25:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:07,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:07,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:07,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657635082] [2021-11-02 22:25:07,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657635082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:07,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:07,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:07,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428236461] [2021-11-02 22:25:07,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:07,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:07,775 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:07,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 118 transitions, 891 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:07,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:07,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:07,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:08,178 INFO L129 PetriNetUnfolder]: 151/468 cut-off events. [2021-11-02 22:25:08,178 INFO L130 PetriNetUnfolder]: For 2237/2239 co-relation queries the response was YES. [2021-11-02 22:25:08,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 468 events. 151/468 cut-off events. For 2237/2239 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2522 event pairs, 34 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 1833. Up to 107 conditions per place. [2021-11-02 22:25:08,187 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 66 selfloop transitions, 36 changer transitions 6/144 dead transitions. [2021-11-02 22:25:08,188 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 144 transitions, 1239 flow [2021-11-02 22:25:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:08,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 702 transitions. [2021-11-02 22:25:08,190 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6347197106690777 [2021-11-02 22:25:08,190 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 702 transitions. [2021-11-02 22:25:08,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 702 transitions. [2021-11-02 22:25:08,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:08,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 702 transitions. [2021-11-02 22:25:08,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.142857142857146) internal successors, (702), 14 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,196 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,196 INFO L186 Difference]: Start difference. First operand has 139 places, 118 transitions, 891 flow. Second operand 14 states and 702 transitions. [2021-11-02 22:25:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 144 transitions, 1239 flow [2021-11-02 22:25:08,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 144 transitions, 1149 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:08,211 INFO L242 Difference]: Finished difference. Result has 138 places, 116 transitions, 861 flow [2021-11-02 22:25:08,211 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=861, PETRI_PLACES=138, PETRI_TRANSITIONS=116} [2021-11-02 22:25:08,212 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 68 predicate places. [2021-11-02 22:25:08,212 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 116 transitions, 861 flow [2021-11-02 22:25:08,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:08,213 INFO L254 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] [2021-11-02 22:25:08,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:25:08,213 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 895414263, now seen corresponding path program 20 times [2021-11-02 22:25:08,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:08,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337799362] [2021-11-02 22:25:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:08,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:08,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:08,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337799362] [2021-11-02 22:25:08,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337799362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:08,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:08,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:25:08,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382399148] [2021-11-02 22:25:08,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:25:08,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:25:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:25:08,412 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2021-11-02 22:25:08,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 116 transitions, 861 flow. Second operand has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:08,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2021-11-02 22:25:08,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:08,711 INFO L129 PetriNetUnfolder]: 151/465 cut-off events. [2021-11-02 22:25:08,712 INFO L130 PetriNetUnfolder]: For 2215/2217 co-relation queries the response was YES. [2021-11-02 22:25:08,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 465 events. 151/465 cut-off events. For 2215/2217 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2478 event pairs, 34 based on Foata normal form. 1/458 useless extension candidates. Maximal degree in co-relation 1828. Up to 105 conditions per place. [2021-11-02 22:25:08,721 INFO L132 encePairwiseOnDemand]: 63/79 looper letters, 68 selfloop transitions, 37 changer transitions 5/146 dead transitions. [2021-11-02 22:25:08,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 146 transitions, 1239 flow [2021-11-02 22:25:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:25:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:25:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 704 transitions. [2021-11-02 22:25:08,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6365280289330922 [2021-11-02 22:25:08,726 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 704 transitions. [2021-11-02 22:25:08,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 704 transitions. [2021-11-02 22:25:08,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:08,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 704 transitions. [2021-11-02 22:25:08,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 50.285714285714285) internal successors, (704), 14 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,736 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,736 INFO L186 Difference]: Start difference. First operand has 138 places, 116 transitions, 861 flow. Second operand 14 states and 704 transitions. [2021-11-02 22:25:08,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 146 transitions, 1239 flow [2021-11-02 22:25:08,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 146 transitions, 1153 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:08,752 INFO L242 Difference]: Finished difference. Result has 138 places, 117 transitions, 879 flow [2021-11-02 22:25:08,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=879, PETRI_PLACES=138, PETRI_TRANSITIONS=117} [2021-11-02 22:25:08,753 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 68 predicate places. [2021-11-02 22:25:08,753 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 117 transitions, 879 flow [2021-11-02 22:25:08,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.5) internal successors, (651), 14 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:08,754 INFO L254 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] [2021-11-02 22:25:08,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:25:08,755 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash -535853999, now seen corresponding path program 1 times [2021-11-02 22:25:08,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:08,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744439018] [2021-11-02 22:25:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:08,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:08,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:08,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744439018] [2021-11-02 22:25:08,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744439018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:08,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:08,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177281244] [2021-11-02 22:25:08,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:08,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:08,797 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:08,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 117 transitions, 879 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:08,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:08,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:08,971 INFO L129 PetriNetUnfolder]: 172/535 cut-off events. [2021-11-02 22:25:08,971 INFO L130 PetriNetUnfolder]: For 2564/2566 co-relation queries the response was YES. [2021-11-02 22:25:08,976 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 535 events. 172/535 cut-off events. For 2564/2566 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2962 event pairs, 41 based on Foata normal form. 3/532 useless extension candidates. Maximal degree in co-relation 2082. Up to 120 conditions per place. [2021-11-02 22:25:08,982 INFO L132 encePairwiseOnDemand]: 73/79 looper letters, 76 selfloop transitions, 30 changer transitions 5/155 dead transitions. [2021-11-02 22:25:08,982 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 155 transitions, 1432 flow [2021-11-02 22:25:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:25:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 438 transitions. [2021-11-02 22:25:08,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7920433996383364 [2021-11-02 22:25:08,984 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 438 transitions. [2021-11-02 22:25:08,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 438 transitions. [2021-11-02 22:25:08,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:08,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 438 transitions. [2021-11-02 22:25:08,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.57142857142857) internal successors, (438), 7 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:08,988 INFO L186 Difference]: Start difference. First operand has 138 places, 117 transitions, 879 flow. Second operand 7 states and 438 transitions. [2021-11-02 22:25:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 155 transitions, 1432 flow [2021-11-02 22:25:09,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 155 transitions, 1314 flow, removed 14 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:09,007 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 965 flow [2021-11-02 22:25:09,007 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=965, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2021-11-02 22:25:09,008 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 61 predicate places. [2021-11-02 22:25:09,008 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 965 flow [2021-11-02 22:25:09,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,008 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:09,009 INFO L254 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] [2021-11-02 22:25:09,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:25:09,009 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1648854421, now seen corresponding path program 2 times [2021-11-02 22:25:09,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:09,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467447012] [2021-11-02 22:25:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:09,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:09,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:09,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467447012] [2021-11-02 22:25:09,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467447012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:09,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:09,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:09,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370144523] [2021-11-02 22:25:09,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:09,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:09,059 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:09,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 965 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,060 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:09,060 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:09,060 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:09,255 INFO L129 PetriNetUnfolder]: 188/578 cut-off events. [2021-11-02 22:25:09,255 INFO L130 PetriNetUnfolder]: For 3295/3301 co-relation queries the response was YES. [2021-11-02 22:25:09,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2395 conditions, 578 events. 188/578 cut-off events. For 3295/3301 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3289 event pairs, 33 based on Foata normal form. 9/581 useless extension candidates. Maximal degree in co-relation 2359. Up to 137 conditions per place. [2021-11-02 22:25:09,267 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 98 selfloop transitions, 45 changer transitions 0/187 dead transitions. [2021-11-02 22:25:09,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 187 transitions, 1839 flow [2021-11-02 22:25:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 510 transitions. [2021-11-02 22:25:09,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8069620253164557 [2021-11-02 22:25:09,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 510 transitions. [2021-11-02 22:25:09,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 510 transitions. [2021-11-02 22:25:09,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:09,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 510 transitions. [2021-11-02 22:25:09,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.75) internal successors, (510), 8 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,273 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,273 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 965 flow. Second operand 8 states and 510 transitions. [2021-11-02 22:25:09,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 187 transitions, 1839 flow [2021-11-02 22:25:09,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 187 transitions, 1722 flow, removed 49 selfloop flow, removed 7 redundant places. [2021-11-02 22:25:09,294 INFO L242 Difference]: Finished difference. Result has 132 places, 142 transitions, 1255 flow [2021-11-02 22:25:09,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2021-11-02 22:25:09,295 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 62 predicate places. [2021-11-02 22:25:09,295 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 1255 flow [2021-11-02 22:25:09,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:09,296 INFO L254 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] [2021-11-02 22:25:09,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:25:09,296 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1246008795, now seen corresponding path program 1 times [2021-11-02 22:25:09,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:09,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141728037] [2021-11-02 22:25:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:09,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:09,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:09,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141728037] [2021-11-02 22:25:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141728037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:09,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352777407] [2021-11-02 22:25:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:09,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:09,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:09,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:25:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:25:09,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:09,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352777407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:09,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:09,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-02 22:25:09,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867642289] [2021-11-02 22:25:09,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:09,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:09,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:09,739 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 1255 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,739 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:09,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:09,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:09,969 INFO L129 PetriNetUnfolder]: 191/593 cut-off events. [2021-11-02 22:25:09,970 INFO L130 PetriNetUnfolder]: For 3357/3367 co-relation queries the response was YES. [2021-11-02 22:25:09,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 593 events. 191/593 cut-off events. For 3357/3367 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3304 event pairs, 35 based on Foata normal form. 15/603 useless extension candidates. Maximal degree in co-relation 2439. Up to 96 conditions per place. [2021-11-02 22:25:09,986 INFO L132 encePairwiseOnDemand]: 69/79 looper letters, 89 selfloop transitions, 66 changer transitions 0/199 dead transitions. [2021-11-02 22:25:09,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 199 transitions, 2086 flow [2021-11-02 22:25:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:25:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:25:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 559 transitions. [2021-11-02 22:25:09,988 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7862165963431786 [2021-11-02 22:25:09,989 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 559 transitions. [2021-11-02 22:25:09,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 559 transitions. [2021-11-02 22:25:09,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:09,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 559 transitions. [2021-11-02 22:25:09,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.111111111111114) internal successors, (559), 9 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,993 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:09,993 INFO L186 Difference]: Start difference. First operand has 132 places, 142 transitions, 1255 flow. Second operand 9 states and 559 transitions. [2021-11-02 22:25:09,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 199 transitions, 2086 flow [2021-11-02 22:25:10,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 199 transitions, 1987 flow, removed 39 selfloop flow, removed 1 redundant places. [2021-11-02 22:25:10,019 INFO L242 Difference]: Finished difference. Result has 141 places, 163 transitions, 1551 flow [2021-11-02 22:25:10,019 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1551, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2021-11-02 22:25:10,019 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 71 predicate places. [2021-11-02 22:25:10,020 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1551 flow [2021-11-02 22:25:10,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:10,020 INFO L254 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] [2021-11-02 22:25:10,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:10,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:25:10,246 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:10,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1945512595, now seen corresponding path program 3 times [2021-11-02 22:25:10,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:10,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88260791] [2021-11-02 22:25:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:10,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:10,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:10,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88260791] [2021-11-02 22:25:10,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88260791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:10,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:10,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:10,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353275492] [2021-11-02 22:25:10,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:10,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:10,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:10,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:10,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1551 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:10,304 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:10,304 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:10,523 INFO L129 PetriNetUnfolder]: 217/636 cut-off events. [2021-11-02 22:25:10,523 INFO L130 PetriNetUnfolder]: For 4061/4061 co-relation queries the response was YES. [2021-11-02 22:25:10,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 636 events. 217/636 cut-off events. For 4061/4061 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3533 event pairs, 22 based on Foata normal form. 9/639 useless extension candidates. Maximal degree in co-relation 2745. Up to 97 conditions per place. [2021-11-02 22:25:10,535 INFO L132 encePairwiseOnDemand]: 69/79 looper letters, 97 selfloop transitions, 99 changer transitions 2/242 dead transitions. [2021-11-02 22:25:10,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 242 transitions, 2715 flow [2021-11-02 22:25:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:25:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:25:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 557 transitions. [2021-11-02 22:25:10,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7834036568213784 [2021-11-02 22:25:10,538 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 557 transitions. [2021-11-02 22:25:10,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 557 transitions. [2021-11-02 22:25:10,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:10,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 557 transitions. [2021-11-02 22:25:10,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 61.888888888888886) internal successors, (557), 9 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,543 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 79.0) internal successors, (790), 10 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,543 INFO L186 Difference]: Start difference. First operand has 141 places, 163 transitions, 1551 flow. Second operand 9 states and 557 transitions. [2021-11-02 22:25:10,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 242 transitions, 2715 flow [2021-11-02 22:25:10,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 242 transitions, 2609 flow, removed 35 selfloop flow, removed 2 redundant places. [2021-11-02 22:25:10,581 INFO L242 Difference]: Finished difference. Result has 152 places, 203 transitions, 2291 flow [2021-11-02 22:25:10,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2291, PETRI_PLACES=152, PETRI_TRANSITIONS=203} [2021-11-02 22:25:10,582 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 82 predicate places. [2021-11-02 22:25:10,582 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 203 transitions, 2291 flow [2021-11-02 22:25:10,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:10,583 INFO L254 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] [2021-11-02 22:25:10,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:25:10,583 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1463459029, now seen corresponding path program 2 times [2021-11-02 22:25:10,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:10,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977341441] [2021-11-02 22:25:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:10,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:10,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:10,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977341441] [2021-11-02 22:25:10,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977341441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:10,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854036563] [2021-11-02 22:25:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:25:10,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:10,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:10,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:10,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:25:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:25:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854036563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:10,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:10,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-02 22:25:10,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928362051] [2021-11-02 22:25:10,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:10,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:10,962 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:10,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 203 transitions, 2291 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:10,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:10,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:10,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:11,274 INFO L129 PetriNetUnfolder]: 233/775 cut-off events. [2021-11-02 22:25:11,275 INFO L130 PetriNetUnfolder]: For 5786/5793 co-relation queries the response was YES. [2021-11-02 22:25:11,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 775 events. 233/775 cut-off events. For 5786/5793 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4833 event pairs, 47 based on Foata normal form. 7/774 useless extension candidates. Maximal degree in co-relation 3341. Up to 164 conditions per place. [2021-11-02 22:25:11,289 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 123 selfloop transitions, 88 changer transitions 0/255 dead transitions. [2021-11-02 22:25:11,289 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 255 transitions, 3210 flow [2021-11-02 22:25:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 510 transitions. [2021-11-02 22:25:11,291 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8069620253164557 [2021-11-02 22:25:11,292 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 510 transitions. [2021-11-02 22:25:11,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 510 transitions. [2021-11-02 22:25:11,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:11,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 510 transitions. [2021-11-02 22:25:11,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.75) internal successors, (510), 8 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,296 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,296 INFO L186 Difference]: Start difference. First operand has 152 places, 203 transitions, 2291 flow. Second operand 8 states and 510 transitions. [2021-11-02 22:25:11,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 255 transitions, 3210 flow [2021-11-02 22:25:11,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 255 transitions, 3141 flow, removed 26 selfloop flow, removed 1 redundant places. [2021-11-02 22:25:11,343 INFO L242 Difference]: Finished difference. Result has 164 places, 221 transitions, 2811 flow [2021-11-02 22:25:11,344 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2811, PETRI_PLACES=164, PETRI_TRANSITIONS=221} [2021-11-02 22:25:11,344 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 94 predicate places. [2021-11-02 22:25:11,345 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 221 transitions, 2811 flow [2021-11-02 22:25:11,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,345 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:11,345 INFO L254 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] [2021-11-02 22:25:11,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:11,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:25:11,562 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:11,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:11,562 INFO L85 PathProgramCache]: Analyzing trace with hash -778804373, now seen corresponding path program 4 times [2021-11-02 22:25:11,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:11,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513168659] [2021-11-02 22:25:11,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:11,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:11,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:11,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513168659] [2021-11-02 22:25:11,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513168659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:11,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:11,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:11,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274900268] [2021-11-02 22:25:11,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:11,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:11,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:11,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:11,606 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:11,607 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 221 transitions, 2811 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,607 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:11,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:11,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:11,888 INFO L129 PetriNetUnfolder]: 226/738 cut-off events. [2021-11-02 22:25:11,889 INFO L130 PetriNetUnfolder]: For 6824/6831 co-relation queries the response was YES. [2021-11-02 22:25:11,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3493 conditions, 738 events. 226/738 cut-off events. For 6824/6831 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4568 event pairs, 42 based on Foata normal form. 2/733 useless extension candidates. Maximal degree in co-relation 3448. Up to 181 conditions per place. [2021-11-02 22:25:11,904 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 140 selfloop transitions, 62 changer transitions 2/248 dead transitions. [2021-11-02 22:25:11,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 248 transitions, 3415 flow [2021-11-02 22:25:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 501 transitions. [2021-11-02 22:25:11,907 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7927215189873418 [2021-11-02 22:25:11,907 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 501 transitions. [2021-11-02 22:25:11,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 501 transitions. [2021-11-02 22:25:11,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:11,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 501 transitions. [2021-11-02 22:25:11,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.625) internal successors, (501), 8 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,911 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,911 INFO L186 Difference]: Start difference. First operand has 164 places, 221 transitions, 2811 flow. Second operand 8 states and 501 transitions. [2021-11-02 22:25:11,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 248 transitions, 3415 flow [2021-11-02 22:25:11,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 248 transitions, 3379 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-11-02 22:25:11,969 INFO L242 Difference]: Finished difference. Result has 172 places, 223 transitions, 3009 flow [2021-11-02 22:25:11,969 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3009, PETRI_PLACES=172, PETRI_TRANSITIONS=223} [2021-11-02 22:25:11,970 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 102 predicate places. [2021-11-02 22:25:11,970 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 223 transitions, 3009 flow [2021-11-02 22:25:11,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:11,971 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:11,971 INFO L254 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] [2021-11-02 22:25:11,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 22:25:11,971 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -421129541, now seen corresponding path program 3 times [2021-11-02 22:25:11,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:11,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623476227] [2021-11-02 22:25:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:11,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:12,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:12,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623476227] [2021-11-02 22:25:12,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623476227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:12,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:12,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:12,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404286881] [2021-11-02 22:25:12,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:12,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:12,014 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:12,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 223 transitions, 3009 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:12,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:12,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:12,296 INFO L129 PetriNetUnfolder]: 219/691 cut-off events. [2021-11-02 22:25:12,296 INFO L130 PetriNetUnfolder]: For 7570/7576 co-relation queries the response was YES. [2021-11-02 22:25:12,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3455 conditions, 691 events. 219/691 cut-off events. For 7570/7576 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4108 event pairs, 46 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 3408. Up to 186 conditions per place. [2021-11-02 22:25:12,312 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 138 selfloop transitions, 63 changer transitions 4/249 dead transitions. [2021-11-02 22:25:12,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3578 flow [2021-11-02 22:25:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 502 transitions. [2021-11-02 22:25:12,314 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7943037974683544 [2021-11-02 22:25:12,315 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 502 transitions. [2021-11-02 22:25:12,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 502 transitions. [2021-11-02 22:25:12,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:12,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 502 transitions. [2021-11-02 22:25:12,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,319 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,319 INFO L186 Difference]: Start difference. First operand has 172 places, 223 transitions, 3009 flow. Second operand 8 states and 502 transitions. [2021-11-02 22:25:12,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3578 flow [2021-11-02 22:25:12,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 249 transitions, 3503 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-11-02 22:25:12,381 INFO L242 Difference]: Finished difference. Result has 175 places, 224 transitions, 3102 flow [2021-11-02 22:25:12,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2889, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3102, PETRI_PLACES=175, PETRI_TRANSITIONS=224} [2021-11-02 22:25:12,382 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 105 predicate places. [2021-11-02 22:25:12,382 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 224 transitions, 3102 flow [2021-11-02 22:25:12,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:12,383 INFO L254 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] [2021-11-02 22:25:12,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 22:25:12,383 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -597866889, now seen corresponding path program 5 times [2021-11-02 22:25:12,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:12,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073661086] [2021-11-02 22:25:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:12,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:12,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:12,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073661086] [2021-11-02 22:25:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073661086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:12,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:12,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:12,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237054151] [2021-11-02 22:25:12,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:12,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:12,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:12,425 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:12,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 224 transitions, 3102 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:12,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:12,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:12,720 INFO L129 PetriNetUnfolder]: 210/647 cut-off events. [2021-11-02 22:25:12,721 INFO L130 PetriNetUnfolder]: For 8317/8317 co-relation queries the response was YES. [2021-11-02 22:25:12,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 647 events. 210/647 cut-off events. For 8317/8317 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3634 event pairs, 41 based on Foata normal form. 7/648 useless extension candidates. Maximal degree in co-relation 3314. Up to 139 conditions per place. [2021-11-02 22:25:12,735 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 108 selfloop transitions, 93 changer transitions 2/247 dead transitions. [2021-11-02 22:25:12,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 247 transitions, 3655 flow [2021-11-02 22:25:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 511 transitions. [2021-11-02 22:25:12,738 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8085443037974683 [2021-11-02 22:25:12,738 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 511 transitions. [2021-11-02 22:25:12,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 511 transitions. [2021-11-02 22:25:12,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:12,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 511 transitions. [2021-11-02 22:25:12,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.875) internal successors, (511), 8 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,742 INFO L186 Difference]: Start difference. First operand has 175 places, 224 transitions, 3102 flow. Second operand 8 states and 511 transitions. [2021-11-02 22:25:12,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 247 transitions, 3655 flow [2021-11-02 22:25:12,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 247 transitions, 3539 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-11-02 22:25:12,800 INFO L242 Difference]: Finished difference. Result has 170 places, 218 transitions, 3081 flow [2021-11-02 22:25:12,801 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3081, PETRI_PLACES=170, PETRI_TRANSITIONS=218} [2021-11-02 22:25:12,801 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 100 predicate places. [2021-11-02 22:25:12,801 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 218 transitions, 3081 flow [2021-11-02 22:25:12,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:12,802 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:12,802 INFO L254 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] [2021-11-02 22:25:12,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-02 22:25:12,802 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:12,803 INFO L85 PathProgramCache]: Analyzing trace with hash -457831229, now seen corresponding path program 4 times [2021-11-02 22:25:12,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:12,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699529376] [2021-11-02 22:25:12,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:12,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:12,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:12,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699529376] [2021-11-02 22:25:12,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699529376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:12,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669956044] [2021-11-02 22:25:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:25:12,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:12,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:12,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:25:13,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:25:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:25:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:13,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669956044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:13,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:13,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-02 22:25:13,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342368911] [2021-11-02 22:25:13,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:13,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:13,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:13,231 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 218 transitions, 3081 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,231 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:13,231 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:13,231 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:13,522 INFO L129 PetriNetUnfolder]: 197/606 cut-off events. [2021-11-02 22:25:13,522 INFO L130 PetriNetUnfolder]: For 8243/8243 co-relation queries the response was YES. [2021-11-02 22:25:13,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3228 conditions, 606 events. 197/606 cut-off events. For 8243/8243 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3292 event pairs, 42 based on Foata normal form. 7/608 useless extension candidates. Maximal degree in co-relation 3187. Up to 189 conditions per place. [2021-11-02 22:25:13,535 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 121 selfloop transitions, 74 changer transitions 0/239 dead transitions. [2021-11-02 22:25:13,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 239 transitions, 3599 flow [2021-11-02 22:25:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 506 transitions. [2021-11-02 22:25:13,538 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8006329113924051 [2021-11-02 22:25:13,538 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 506 transitions. [2021-11-02 22:25:13,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 506 transitions. [2021-11-02 22:25:13,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:13,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 506 transitions. [2021-11-02 22:25:13,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 63.25) internal successors, (506), 8 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,542 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,543 INFO L186 Difference]: Start difference. First operand has 170 places, 218 transitions, 3081 flow. Second operand 8 states and 506 transitions. [2021-11-02 22:25:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 239 transitions, 3599 flow [2021-11-02 22:25:13,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 239 transitions, 3574 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-11-02 22:25:13,595 INFO L242 Difference]: Finished difference. Result has 178 places, 215 transitions, 3201 flow [2021-11-02 22:25:13,595 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2928, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3201, PETRI_PLACES=178, PETRI_TRANSITIONS=215} [2021-11-02 22:25:13,596 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 108 predicate places. [2021-11-02 22:25:13,596 INFO L470 AbstractCegarLoop]: Abstraction has has 178 places, 215 transitions, 3201 flow [2021-11-02 22:25:13,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,597 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:13,597 INFO L254 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] [2021-11-02 22:25:13,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:13,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:13,818 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:13,818 INFO L85 PathProgramCache]: Analyzing trace with hash -256073797, now seen corresponding path program 5 times [2021-11-02 22:25:13,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:13,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797918613] [2021-11-02 22:25:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:13,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:13,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:13,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797918613] [2021-11-02 22:25:13,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797918613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:13,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:13,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:13,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842487844] [2021-11-02 22:25:13,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:13,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:13,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:13,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:13,861 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:13,862 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 215 transitions, 3201 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:13,862 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:13,862 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:13,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:14,085 INFO L129 PetriNetUnfolder]: 192/601 cut-off events. [2021-11-02 22:25:14,086 INFO L130 PetriNetUnfolder]: For 8748/8748 co-relation queries the response was YES. [2021-11-02 22:25:14,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 601 events. 192/601 cut-off events. For 8748/8748 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3301 event pairs, 51 based on Foata normal form. 3/599 useless extension candidates. Maximal degree in co-relation 3236. Up to 195 conditions per place. [2021-11-02 22:25:14,098 INFO L132 encePairwiseOnDemand]: 73/79 looper letters, 143 selfloop transitions, 35 changer transitions 5/227 dead transitions. [2021-11-02 22:25:14,098 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 227 transitions, 3550 flow [2021-11-02 22:25:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:25:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 436 transitions. [2021-11-02 22:25:14,100 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7884267631103075 [2021-11-02 22:25:14,101 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 436 transitions. [2021-11-02 22:25:14,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 436 transitions. [2021-11-02 22:25:14,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:14,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 436 transitions. [2021-11-02 22:25:14,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,105 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,105 INFO L186 Difference]: Start difference. First operand has 178 places, 215 transitions, 3201 flow. Second operand 7 states and 436 transitions. [2021-11-02 22:25:14,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 227 transitions, 3550 flow [2021-11-02 22:25:14,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 227 transitions, 3460 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-11-02 22:25:14,158 INFO L242 Difference]: Finished difference. Result has 183 places, 209 transitions, 3011 flow [2021-11-02 22:25:14,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3011, PETRI_PLACES=183, PETRI_TRANSITIONS=209} [2021-11-02 22:25:14,159 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 113 predicate places. [2021-11-02 22:25:14,159 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 209 transitions, 3011 flow [2021-11-02 22:25:14,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,160 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:14,160 INFO L254 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] [2021-11-02 22:25:14,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-02 22:25:14,161 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:14,162 INFO L85 PathProgramCache]: Analyzing trace with hash -427967757, now seen corresponding path program 6 times [2021-11-02 22:25:14,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:14,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218225184] [2021-11-02 22:25:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:14,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:14,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:14,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218225184] [2021-11-02 22:25:14,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218225184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:14,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:14,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:14,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622592084] [2021-11-02 22:25:14,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:14,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:14,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:14,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 209 transitions, 3011 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:14,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:14,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:14,408 INFO L129 PetriNetUnfolder]: 181/541 cut-off events. [2021-11-02 22:25:14,408 INFO L130 PetriNetUnfolder]: For 7966/7966 co-relation queries the response was YES. [2021-11-02 22:25:14,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2990 conditions, 541 events. 181/541 cut-off events. For 7966/7966 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2794 event pairs, 42 based on Foata normal form. 2/538 useless extension candidates. Maximal degree in co-relation 2947. Up to 195 conditions per place. [2021-11-02 22:25:14,418 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 119 selfloop transitions, 48 changer transitions 2/213 dead transitions. [2021-11-02 22:25:14,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 213 transitions, 3225 flow [2021-11-02 22:25:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:25:14,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-02 22:25:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 497 transitions. [2021-11-02 22:25:14,422 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7863924050632911 [2021-11-02 22:25:14,422 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 497 transitions. [2021-11-02 22:25:14,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 497 transitions. [2021-11-02 22:25:14,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:14,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 497 transitions. [2021-11-02 22:25:14,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.125) internal successors, (497), 8 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,427 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,427 INFO L186 Difference]: Start difference. First operand has 183 places, 209 transitions, 3011 flow. Second operand 8 states and 497 transitions. [2021-11-02 22:25:14,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 213 transitions, 3225 flow [2021-11-02 22:25:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 3033 flow, removed 10 selfloop flow, removed 12 redundant places. [2021-11-02 22:25:14,468 INFO L242 Difference]: Finished difference. Result has 174 places, 195 transitions, 2699 flow [2021-11-02 22:25:14,469 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2699, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2021-11-02 22:25:14,469 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 104 predicate places. [2021-11-02 22:25:14,469 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2699 flow [2021-11-02 22:25:14,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,470 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:14,470 INFO L254 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] [2021-11-02 22:25:14,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-02 22:25:14,471 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash -856293725, now seen corresponding path program 6 times [2021-11-02 22:25:14,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:14,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653045087] [2021-11-02 22:25:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:14,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:14,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:14,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653045087] [2021-11-02 22:25:14,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653045087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:25:14,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:25:14,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:25:14,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044078754] [2021-11-02 22:25:14,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:25:14,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:14,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:25:14,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:25:14,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 79 [2021-11-02 22:25:14,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2699 flow. Second operand has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,506 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:14,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 79 [2021-11-02 22:25:14,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:14,663 INFO L129 PetriNetUnfolder]: 172/489 cut-off events. [2021-11-02 22:25:14,664 INFO L130 PetriNetUnfolder]: For 6711/6711 co-relation queries the response was YES. [2021-11-02 22:25:14,667 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 489 events. 172/489 cut-off events. For 6711/6711 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2375 event pairs, 40 based on Foata normal form. 2/486 useless extension candidates. Maximal degree in co-relation 2679. Up to 167 conditions per place. [2021-11-02 22:25:14,671 INFO L132 encePairwiseOnDemand]: 71/79 looper letters, 102 selfloop transitions, 47 changer transitions 2/195 dead transitions. [2021-11-02 22:25:14,671 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 195 transitions, 2865 flow [2021-11-02 22:25:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:25:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:25:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 433 transitions. [2021-11-02 22:25:14,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.783001808318264 [2021-11-02 22:25:14,673 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 433 transitions. [2021-11-02 22:25:14,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 433 transitions. [2021-11-02 22:25:14,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:14,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 433 transitions. [2021-11-02 22:25:14,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,676 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,676 INFO L186 Difference]: Start difference. First operand has 174 places, 195 transitions, 2699 flow. Second operand 7 states and 433 transitions. [2021-11-02 22:25:14,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 195 transitions, 2865 flow [2021-11-02 22:25:14,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 195 transitions, 2713 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-11-02 22:25:14,706 INFO L242 Difference]: Finished difference. Result has 163 places, 181 transitions, 2429 flow [2021-11-02 22:25:14,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2429, PETRI_PLACES=163, PETRI_TRANSITIONS=181} [2021-11-02 22:25:14,708 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 93 predicate places. [2021-11-02 22:25:14,708 INFO L470 AbstractCegarLoop]: Abstraction has has 163 places, 181 transitions, 2429 flow [2021-11-02 22:25:14,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.2) internal successors, (291), 5 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:14,708 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:14,708 INFO L254 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] [2021-11-02 22:25:14,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-02 22:25:14,709 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:14,709 INFO L85 PathProgramCache]: Analyzing trace with hash -954675579, now seen corresponding path program 1 times [2021-11-02 22:25:14,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:14,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486040437] [2021-11-02 22:25:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:14,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:14,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:14,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486040437] [2021-11-02 22:25:14,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486040437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:14,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498330402] [2021-11-02 22:25:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:14,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:14,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:14,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:25:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:15,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498330402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:15,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:15,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:15,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956547195] [2021-11-02 22:25:15,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:15,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:15,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:15,678 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:15,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 181 transitions, 2429 flow. Second operand has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:15,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:15,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:15,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:17,972 INFO L129 PetriNetUnfolder]: 551/1299 cut-off events. [2021-11-02 22:25:17,972 INFO L130 PetriNetUnfolder]: For 15196/15196 co-relation queries the response was YES. [2021-11-02 22:25:17,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7114 conditions, 1299 events. 551/1299 cut-off events. For 15196/15196 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7750 event pairs, 40 based on Foata normal form. 1/1299 useless extension candidates. Maximal degree in co-relation 7083. Up to 223 conditions per place. [2021-11-02 22:25:17,995 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 270 selfloop transitions, 310 changer transitions 6/620 dead transitions. [2021-11-02 22:25:17,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 620 transitions, 8930 flow [2021-11-02 22:25:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 22:25:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-02 22:25:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 3485 transitions. [2021-11-02 22:25:18,009 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6043003294607248 [2021-11-02 22:25:18,009 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 3485 transitions. [2021-11-02 22:25:18,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 3485 transitions. [2021-11-02 22:25:18,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:18,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 3485 transitions. [2021-11-02 22:25:18,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 47.73972602739726) internal successors, (3485), 73 states have internal predecessors, (3485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:18,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 79.0) internal successors, (5846), 74 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:18,044 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 79.0) internal successors, (5846), 74 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:18,045 INFO L186 Difference]: Start difference. First operand has 163 places, 181 transitions, 2429 flow. Second operand 73 states and 3485 transitions. [2021-11-02 22:25:18,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 620 transitions, 8930 flow [2021-11-02 22:25:18,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 620 transitions, 8260 flow, removed 1 selfloop flow, removed 13 redundant places. [2021-11-02 22:25:18,112 INFO L242 Difference]: Finished difference. Result has 271 places, 468 transitions, 6862 flow [2021-11-02 22:25:18,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=6862, PETRI_PLACES=271, PETRI_TRANSITIONS=468} [2021-11-02 22:25:18,113 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 201 predicate places. [2021-11-02 22:25:18,113 INFO L470 AbstractCegarLoop]: Abstraction has has 271 places, 468 transitions, 6862 flow [2021-11-02 22:25:18,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:18,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:18,114 INFO L254 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] [2021-11-02 22:25:18,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:18,333 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash 822193689, now seen corresponding path program 2 times [2021-11-02 22:25:18,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:18,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313036989] [2021-11-02 22:25:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:18,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:18,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:18,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313036989] [2021-11-02 22:25:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313036989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:18,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855431345] [2021-11-02 22:25:18,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:25:18,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:18,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:18,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:18,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:25:18,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:18,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:18,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:19,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855431345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:19,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:19,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:19,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349455843] [2021-11-02 22:25:19,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:19,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:19,556 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:19,558 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 468 transitions, 6862 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:19,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:19,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:19,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:20,720 INFO L129 PetriNetUnfolder]: 554/1532 cut-off events. [2021-11-02 22:25:20,721 INFO L130 PetriNetUnfolder]: For 27203/27203 co-relation queries the response was YES. [2021-11-02 22:25:20,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10417 conditions, 1532 events. 554/1532 cut-off events. For 27203/27203 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10592 event pairs, 41 based on Foata normal form. 1/1532 useless extension candidates. Maximal degree in co-relation 10334. Up to 245 conditions per place. [2021-11-02 22:25:20,764 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 374 selfloop transitions, 205 changer transitions 24/637 dead transitions. [2021-11-02 22:25:20,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 637 transitions, 11022 flow [2021-11-02 22:25:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:25:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-02 22:25:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1401 transitions. [2021-11-02 22:25:20,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6333634719710669 [2021-11-02 22:25:20,768 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1401 transitions. [2021-11-02 22:25:20,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1401 transitions. [2021-11-02 22:25:20,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:20,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1401 transitions. [2021-11-02 22:25:20,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 50.035714285714285) internal successors, (1401), 28 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:20,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:20,777 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:20,777 INFO L186 Difference]: Start difference. First operand has 271 places, 468 transitions, 6862 flow. Second operand 28 states and 1401 transitions. [2021-11-02 22:25:20,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 637 transitions, 11022 flow [2021-11-02 22:25:21,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 637 transitions, 10932 flow, removed 45 selfloop flow, removed 3 redundant places. [2021-11-02 22:25:21,040 INFO L242 Difference]: Finished difference. Result has 304 places, 477 transitions, 7418 flow [2021-11-02 22:25:21,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7418, PETRI_PLACES=304, PETRI_TRANSITIONS=477} [2021-11-02 22:25:21,041 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 234 predicate places. [2021-11-02 22:25:21,041 INFO L470 AbstractCegarLoop]: Abstraction has has 304 places, 477 transitions, 7418 flow [2021-11-02 22:25:21,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:21,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:21,042 INFO L254 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] [2021-11-02 22:25:21,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:21,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:21,258 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash -738603401, now seen corresponding path program 3 times [2021-11-02 22:25:21,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:21,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147978517] [2021-11-02 22:25:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:21,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:21,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:21,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147978517] [2021-11-02 22:25:21,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147978517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:21,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906703976] [2021-11-02 22:25:21,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:25:21,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:21,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:21,442 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:21,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:25:21,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:25:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:21,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:22,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906703976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:22,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:22,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:22,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872769191] [2021-11-02 22:25:22,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:22,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:22,331 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:22,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 477 transitions, 7418 flow. Second operand has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:22,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:22,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:22,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:23,434 INFO L129 PetriNetUnfolder]: 545/1530 cut-off events. [2021-11-02 22:25:23,435 INFO L130 PetriNetUnfolder]: For 32379/32379 co-relation queries the response was YES. [2021-11-02 22:25:23,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11119 conditions, 1530 events. 545/1530 cut-off events. For 32379/32379 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10792 event pairs, 41 based on Foata normal form. 1/1530 useless extension candidates. Maximal degree in co-relation 11025. Up to 250 conditions per place. [2021-11-02 22:25:23,477 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 346 selfloop transitions, 221 changer transitions 17/618 dead transitions. [2021-11-02 22:25:23,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 618 transitions, 11308 flow [2021-11-02 22:25:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:25:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-02 22:25:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1391 transitions. [2021-11-02 22:25:23,481 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6288426763110307 [2021-11-02 22:25:23,481 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1391 transitions. [2021-11-02 22:25:23,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1391 transitions. [2021-11-02 22:25:23,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:23,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1391 transitions. [2021-11-02 22:25:23,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 49.67857142857143) internal successors, (1391), 28 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:23,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:23,490 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 79.0) internal successors, (2291), 29 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:23,490 INFO L186 Difference]: Start difference. First operand has 304 places, 477 transitions, 7418 flow. Second operand 28 states and 1391 transitions. [2021-11-02 22:25:23,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 618 transitions, 11308 flow [2021-11-02 22:25:23,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 618 transitions, 10826 flow, removed 101 selfloop flow, removed 17 redundant places. [2021-11-02 22:25:23,812 INFO L242 Difference]: Finished difference. Result has 318 places, 487 transitions, 7809 flow [2021-11-02 22:25:23,812 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7048, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7809, PETRI_PLACES=318, PETRI_TRANSITIONS=487} [2021-11-02 22:25:23,813 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2021-11-02 22:25:23,813 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 487 transitions, 7809 flow [2021-11-02 22:25:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:23,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:23,814 INFO L254 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] [2021-11-02 22:25:23,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:24,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:25:24,030 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2088785773, now seen corresponding path program 4 times [2021-11-02 22:25:24,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:24,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943146549] [2021-11-02 22:25:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:24,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:24,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:24,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943146549] [2021-11-02 22:25:24,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943146549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:24,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801576123] [2021-11-02 22:25:24,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:25:24,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:24,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:24,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:24,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:25:24,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:25:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:25:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:25,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801576123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:25,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:25,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:25:25,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544870389] [2021-11-02 22:25:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:25,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:25,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:25,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:25,153 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 487 transitions, 7809 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:25,153 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:25,154 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:25,154 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:26,245 INFO L129 PetriNetUnfolder]: 540/1505 cut-off events. [2021-11-02 22:25:26,246 INFO L130 PetriNetUnfolder]: For 34578/34578 co-relation queries the response was YES. [2021-11-02 22:25:26,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11397 conditions, 1505 events. 540/1505 cut-off events. For 34578/34578 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 10475 event pairs, 41 based on Foata normal form. 1/1505 useless extension candidates. Maximal degree in co-relation 11297. Up to 249 conditions per place. [2021-11-02 22:25:26,288 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 345 selfloop transitions, 222 changer transitions 17/618 dead transitions. [2021-11-02 22:25:26,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 618 transitions, 11513 flow [2021-11-02 22:25:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:25:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-02 22:25:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1613 transitions. [2021-11-02 22:25:26,292 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6187188339087073 [2021-11-02 22:25:26,292 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1613 transitions. [2021-11-02 22:25:26,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1613 transitions. [2021-11-02 22:25:26,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:26,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1613 transitions. [2021-11-02 22:25:26,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 48.878787878787875) internal successors, (1613), 33 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:26,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 79.0) internal successors, (2686), 34 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:26,302 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 79.0) internal successors, (2686), 34 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:26,302 INFO L186 Difference]: Start difference. First operand has 318 places, 487 transitions, 7809 flow. Second operand 33 states and 1613 transitions. [2021-11-02 22:25:26,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 618 transitions, 11513 flow [2021-11-02 22:25:26,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 618 transitions, 10981 flow, removed 96 selfloop flow, removed 20 redundant places. [2021-11-02 22:25:26,654 INFO L242 Difference]: Finished difference. Result has 334 places, 488 transitions, 7860 flow [2021-11-02 22:25:26,655 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7860, PETRI_PLACES=334, PETRI_TRANSITIONS=488} [2021-11-02 22:25:26,655 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 264 predicate places. [2021-11-02 22:25:26,656 INFO L470 AbstractCegarLoop]: Abstraction has has 334 places, 488 transitions, 7860 flow [2021-11-02 22:25:26,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:26,657 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:26,657 INFO L254 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] [2021-11-02 22:25:26,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:26,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 22:25:26,886 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -549799151, now seen corresponding path program 5 times [2021-11-02 22:25:26,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:26,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619474592] [2021-11-02 22:25:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:26,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:27,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619474592] [2021-11-02 22:25:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619474592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:27,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361971228] [2021-11-02 22:25:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:25:27,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:27,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:27,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:27,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:25:27,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:25:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:27,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361971228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:27,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:27,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:25:27,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302859188] [2021-11-02 22:25:27,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:27,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:27,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:27,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 488 transitions, 7860 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:27,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:27,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:27,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:29,247 INFO L129 PetriNetUnfolder]: 549/1588 cut-off events. [2021-11-02 22:25:29,247 INFO L130 PetriNetUnfolder]: For 37224/37224 co-relation queries the response was YES. [2021-11-02 22:25:29,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12123 conditions, 1588 events. 549/1588 cut-off events. For 37224/37224 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11491 event pairs, 10 based on Foata normal form. 1/1588 useless extension candidates. Maximal degree in co-relation 12018. Up to 247 conditions per place. [2021-11-02 22:25:29,289 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 322 selfloop transitions, 303 changer transitions 10/669 dead transitions. [2021-11-02 22:25:29,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 669 transitions, 12514 flow [2021-11-02 22:25:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:25:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-02 22:25:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1449 transitions. [2021-11-02 22:25:29,293 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6324749017896115 [2021-11-02 22:25:29,294 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1449 transitions. [2021-11-02 22:25:29,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1449 transitions. [2021-11-02 22:25:29,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:29,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1449 transitions. [2021-11-02 22:25:29,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 49.96551724137931) internal successors, (1449), 29 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:29,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 79.0) internal successors, (2370), 30 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:29,303 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 79.0) internal successors, (2370), 30 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:29,303 INFO L186 Difference]: Start difference. First operand has 334 places, 488 transitions, 7860 flow. Second operand 29 states and 1449 transitions. [2021-11-02 22:25:29,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 669 transitions, 12514 flow [2021-11-02 22:25:29,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 669 transitions, 11871 flow, removed 83 selfloop flow, removed 22 redundant places. [2021-11-02 22:25:29,522 INFO L242 Difference]: Finished difference. Result has 341 places, 534 transitions, 8802 flow [2021-11-02 22:25:29,523 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7323, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8802, PETRI_PLACES=341, PETRI_TRANSITIONS=534} [2021-11-02 22:25:29,523 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 271 predicate places. [2021-11-02 22:25:29,523 INFO L470 AbstractCegarLoop]: Abstraction has has 341 places, 534 transitions, 8802 flow [2021-11-02 22:25:29,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:29,524 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:29,524 INFO L254 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] [2021-11-02 22:25:29,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-02 22:25:29,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:25:29,725 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2125469967, now seen corresponding path program 6 times [2021-11-02 22:25:29,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:29,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607014936] [2021-11-02 22:25:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:29,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:29,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:29,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607014936] [2021-11-02 22:25:29,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607014936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:29,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723997108] [2021-11-02 22:25:29,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:25:29,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:29,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:29,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:29,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:25:30,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-02 22:25:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723997108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:31,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:31,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:31,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893924762] [2021-11-02 22:25:31,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:31,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:31,104 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:31,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 534 transitions, 8802 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:31,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:31,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:31,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:32,169 INFO L129 PetriNetUnfolder]: 544/1580 cut-off events. [2021-11-02 22:25:32,170 INFO L130 PetriNetUnfolder]: For 38550/38550 co-relation queries the response was YES. [2021-11-02 22:25:32,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12393 conditions, 1580 events. 544/1580 cut-off events. For 38550/38550 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11350 event pairs, 41 based on Foata normal form. 1/1580 useless extension candidates. Maximal degree in co-relation 12286. Up to 298 conditions per place. [2021-11-02 22:25:32,204 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 364 selfloop transitions, 245 changer transitions 11/654 dead transitions. [2021-11-02 22:25:32,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 654 transitions, 12525 flow [2021-11-02 22:25:32,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:25:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 22:25:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1348 transitions. [2021-11-02 22:25:32,208 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6319737458977965 [2021-11-02 22:25:32,209 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1348 transitions. [2021-11-02 22:25:32,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1348 transitions. [2021-11-02 22:25:32,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:32,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1348 transitions. [2021-11-02 22:25:32,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 49.925925925925924) internal successors, (1348), 27 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:32,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:32,218 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:32,218 INFO L186 Difference]: Start difference. First operand has 341 places, 534 transitions, 8802 flow. Second operand 27 states and 1348 transitions. [2021-11-02 22:25:32,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 654 transitions, 12525 flow [2021-11-02 22:25:32,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 654 transitions, 11864 flow, removed 159 selfloop flow, removed 20 redundant places. [2021-11-02 22:25:32,552 INFO L242 Difference]: Finished difference. Result has 347 places, 531 transitions, 8788 flow [2021-11-02 22:25:32,553 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8788, PETRI_PLACES=347, PETRI_TRANSITIONS=531} [2021-11-02 22:25:32,554 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 277 predicate places. [2021-11-02 22:25:32,554 INFO L470 AbstractCegarLoop]: Abstraction has has 347 places, 531 transitions, 8788 flow [2021-11-02 22:25:32,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:32,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:32,555 INFO L254 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] [2021-11-02 22:25:32,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:32,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:25:32,778 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash -551820843, now seen corresponding path program 7 times [2021-11-02 22:25:32,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:32,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670686097] [2021-11-02 22:25:32,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:32,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:33,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:33,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670686097] [2021-11-02 22:25:33,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670686097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:33,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815942843] [2021-11-02 22:25:33,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:25:33,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:33,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:33,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:33,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:25:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:33,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:34,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815942843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:34,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:34,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:34,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546432626] [2021-11-02 22:25:34,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:34,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:34,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:34,183 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:34,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 531 transitions, 8788 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:34,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:34,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:34,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:35,351 INFO L129 PetriNetUnfolder]: 541/1557 cut-off events. [2021-11-02 22:25:35,352 INFO L130 PetriNetUnfolder]: For 36548/36548 co-relation queries the response was YES. [2021-11-02 22:25:35,365 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12143 conditions, 1557 events. 541/1557 cut-off events. For 36548/36548 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11018 event pairs, 41 based on Foata normal form. 1/1557 useless extension candidates. Maximal degree in co-relation 12039. Up to 264 conditions per place. [2021-11-02 22:25:35,376 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 364 selfloop transitions, 218 changer transitions 37/653 dead transitions. [2021-11-02 22:25:35,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 653 transitions, 12421 flow [2021-11-02 22:25:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 22:25:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-02 22:25:35,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1352 transitions. [2021-11-02 22:25:35,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.63384903891233 [2021-11-02 22:25:35,379 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1352 transitions. [2021-11-02 22:25:35,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1352 transitions. [2021-11-02 22:25:35,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:35,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1352 transitions. [2021-11-02 22:25:35,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 50.074074074074076) internal successors, (1352), 27 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:35,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:35,389 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:35,389 INFO L186 Difference]: Start difference. First operand has 347 places, 531 transitions, 8788 flow. Second operand 27 states and 1352 transitions. [2021-11-02 22:25:35,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 653 transitions, 12421 flow [2021-11-02 22:25:35,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 653 transitions, 11930 flow, removed 17 selfloop flow, removed 23 redundant places. [2021-11-02 22:25:35,696 INFO L242 Difference]: Finished difference. Result has 350 places, 502 transitions, 8186 flow [2021-11-02 22:25:35,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8186, PETRI_PLACES=350, PETRI_TRANSITIONS=502} [2021-11-02 22:25:35,697 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 280 predicate places. [2021-11-02 22:25:35,697 INFO L470 AbstractCegarLoop]: Abstraction has has 350 places, 502 transitions, 8186 flow [2021-11-02 22:25:35,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:35,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:35,698 INFO L254 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] [2021-11-02 22:25:35,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:35,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:25:35,926 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:35,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:35,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1207474249, now seen corresponding path program 8 times [2021-11-02 22:25:35,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:35,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249829065] [2021-11-02 22:25:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:35,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:36,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:36,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249829065] [2021-11-02 22:25:36,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249829065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:36,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155729897] [2021-11-02 22:25:36,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:25:36,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:36,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:36,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:25:36,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:25:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:37,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155729897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:37,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:37,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:25:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252485606] [2021-11-02 22:25:37,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:37,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:37,116 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:37,118 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 502 transitions, 8186 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:37,118 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:37,118 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:37,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:38,568 INFO L129 PetriNetUnfolder]: 602/1729 cut-off events. [2021-11-02 22:25:38,568 INFO L130 PetriNetUnfolder]: For 43378/43378 co-relation queries the response was YES. [2021-11-02 22:25:38,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13742 conditions, 1729 events. 602/1729 cut-off events. For 43378/43378 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12587 event pairs, 10 based on Foata normal form. 1/1729 useless extension candidates. Maximal degree in co-relation 13638. Up to 286 conditions per place. [2021-11-02 22:25:38,613 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 257 selfloop transitions, 384 changer transitions 26/701 dead transitions. [2021-11-02 22:25:38,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 701 transitions, 13360 flow [2021-11-02 22:25:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:25:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-02 22:25:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1908 transitions. [2021-11-02 22:25:38,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6192794547224927 [2021-11-02 22:25:38,617 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1908 transitions. [2021-11-02 22:25:38,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1908 transitions. [2021-11-02 22:25:38,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:38,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1908 transitions. [2021-11-02 22:25:38,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 48.92307692307692) internal successors, (1908), 39 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:38,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:38,626 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:38,626 INFO L186 Difference]: Start difference. First operand has 350 places, 502 transitions, 8186 flow. Second operand 39 states and 1908 transitions. [2021-11-02 22:25:38,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 701 transitions, 13360 flow [2021-11-02 22:25:38,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 701 transitions, 12724 flow, removed 59 selfloop flow, removed 30 redundant places. [2021-11-02 22:25:38,814 INFO L242 Difference]: Finished difference. Result has 356 places, 575 transitions, 10206 flow [2021-11-02 22:25:38,815 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=7682, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10206, PETRI_PLACES=356, PETRI_TRANSITIONS=575} [2021-11-02 22:25:38,815 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 286 predicate places. [2021-11-02 22:25:38,815 INFO L470 AbstractCegarLoop]: Abstraction has has 356 places, 575 transitions, 10206 flow [2021-11-02 22:25:38,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:38,816 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:38,816 INFO L254 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] [2021-11-02 22:25:38,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:39,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 22:25:39,017 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2143230481, now seen corresponding path program 9 times [2021-11-02 22:25:39,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:39,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433935196] [2021-11-02 22:25:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:39,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:39,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:39,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433935196] [2021-11-02 22:25:39,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433935196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:39,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504190591] [2021-11-02 22:25:39,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:25:39,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:39,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:39,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:39,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:25:39,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:25:39,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:25:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504190591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:40,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:40,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:25:40,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718615004] [2021-11-02 22:25:40,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:40,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:40,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:40,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 575 transitions, 10206 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:40,168 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:40,168 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:40,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:41,780 INFO L129 PetriNetUnfolder]: 603/1787 cut-off events. [2021-11-02 22:25:41,780 INFO L130 PetriNetUnfolder]: For 47903/47903 co-relation queries the response was YES. [2021-11-02 22:25:41,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 1787 events. 603/1787 cut-off events. For 47903/47903 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13372 event pairs, 10 based on Foata normal form. 1/1787 useless extension candidates. Maximal degree in co-relation 14651. Up to 291 conditions per place. [2021-11-02 22:25:41,823 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 260 selfloop transitions, 409 changer transitions 13/716 dead transitions. [2021-11-02 22:25:41,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 716 transitions, 14562 flow [2021-11-02 22:25:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:25:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-02 22:25:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2044 transitions. [2021-11-02 22:25:41,827 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6160337552742616 [2021-11-02 22:25:41,828 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2044 transitions. [2021-11-02 22:25:41,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2044 transitions. [2021-11-02 22:25:41,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:41,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2044 transitions. [2021-11-02 22:25:41,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 48.666666666666664) internal successors, (2044), 42 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:41,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 79.0) internal successors, (3397), 43 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:41,841 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 79.0) internal successors, (3397), 43 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:41,842 INFO L186 Difference]: Start difference. First operand has 356 places, 575 transitions, 10206 flow. Second operand 42 states and 2044 transitions. [2021-11-02 22:25:41,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 716 transitions, 14562 flow [2021-11-02 22:25:42,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 716 transitions, 13802 flow, removed 117 selfloop flow, removed 27 redundant places. [2021-11-02 22:25:42,165 INFO L242 Difference]: Finished difference. Result has 373 places, 603 transitions, 11041 flow [2021-11-02 22:25:42,166 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=9529, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11041, PETRI_PLACES=373, PETRI_TRANSITIONS=603} [2021-11-02 22:25:42,166 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 303 predicate places. [2021-11-02 22:25:42,166 INFO L470 AbstractCegarLoop]: Abstraction has has 373 places, 603 transitions, 11041 flow [2021-11-02 22:25:42,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:42,166 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:42,167 INFO L254 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] [2021-11-02 22:25:42,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:42,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 22:25:42,367 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:42,368 INFO L85 PathProgramCache]: Analyzing trace with hash -607050531, now seen corresponding path program 10 times [2021-11-02 22:25:42,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:42,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143765161] [2021-11-02 22:25:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:42,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:42,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:42,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143765161] [2021-11-02 22:25:42,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143765161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:42,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583477462] [2021-11-02 22:25:42,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:25:42,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:42,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:42,598 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:42,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:25:43,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:25:43,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:25:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:43,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583477462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:43,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:43,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:25:43,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877100959] [2021-11-02 22:25:43,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:43,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:43,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:43,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 603 transitions, 11041 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:43,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:43,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:43,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:47,474 INFO L129 PetriNetUnfolder]: 748/2072 cut-off events. [2021-11-02 22:25:47,474 INFO L130 PetriNetUnfolder]: For 55070/55070 co-relation queries the response was YES. [2021-11-02 22:25:47,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17458 conditions, 2072 events. 748/2072 cut-off events. For 55070/55070 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15445 event pairs, 31 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 17345. Up to 359 conditions per place. [2021-11-02 22:25:47,515 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 412 selfloop transitions, 538 changer transitions 11/995 dead transitions. [2021-11-02 22:25:47,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 995 transitions, 20568 flow [2021-11-02 22:25:47,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-02 22:25:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-11-02 22:25:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 4895 transitions. [2021-11-02 22:25:47,526 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5957887049659202 [2021-11-02 22:25:47,526 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 4895 transitions. [2021-11-02 22:25:47,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 4895 transitions. [2021-11-02 22:25:47,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:47,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 4895 transitions. [2021-11-02 22:25:47,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 47.06730769230769) internal successors, (4895), 104 states have internal predecessors, (4895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:47,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 79.0) internal successors, (8295), 105 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:47,550 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 79.0) internal successors, (8295), 105 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:47,551 INFO L186 Difference]: Start difference. First operand has 373 places, 603 transitions, 11041 flow. Second operand 104 states and 4895 transitions. [2021-11-02 22:25:47,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 995 transitions, 20568 flow [2021-11-02 22:25:47,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 995 transitions, 19280 flow, removed 125 selfloop flow, removed 30 redundant places. [2021-11-02 22:25:47,917 INFO L242 Difference]: Finished difference. Result has 447 places, 817 transitions, 14705 flow [2021-11-02 22:25:47,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=10241, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=14705, PETRI_PLACES=447, PETRI_TRANSITIONS=817} [2021-11-02 22:25:47,919 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 377 predicate places. [2021-11-02 22:25:47,919 INFO L470 AbstractCegarLoop]: Abstraction has has 447 places, 817 transitions, 14705 flow [2021-11-02 22:25:47,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:47,920 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:47,920 INFO L254 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] [2021-11-02 22:25:47,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:48,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:48,134 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:48,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1366806439, now seen corresponding path program 11 times [2021-11-02 22:25:48,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:48,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373006667] [2021-11-02 22:25:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:48,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:48,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:48,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373006667] [2021-11-02 22:25:48,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373006667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:48,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375480887] [2021-11-02 22:25:48,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:25:48,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:48,378 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:48,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:25:48,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:25:48,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:49,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375480887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:49,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:49,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:49,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849308847] [2021-11-02 22:25:49,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:49,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:49,578 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:49,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 817 transitions, 14705 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:49,579 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:49,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:49,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:51,097 INFO L129 PetriNetUnfolder]: 751/2102 cut-off events. [2021-11-02 22:25:51,097 INFO L130 PetriNetUnfolder]: For 53626/53626 co-relation queries the response was YES. [2021-11-02 22:25:51,121 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17503 conditions, 2102 events. 751/2102 cut-off events. For 53626/53626 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15838 event pairs, 31 based on Foata normal form. 1/2102 useless extension candidates. Maximal degree in co-relation 17389. Up to 356 conditions per place. [2021-11-02 22:25:51,135 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 436 selfloop transitions, 486 changer transitions 27/983 dead transitions. [2021-11-02 22:25:51,135 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 983 transitions, 20187 flow [2021-11-02 22:25:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:25:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 22:25:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1777 transitions. [2021-11-02 22:25:51,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6248241912798875 [2021-11-02 22:25:51,138 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1777 transitions. [2021-11-02 22:25:51,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1777 transitions. [2021-11-02 22:25:51,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:51,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1777 transitions. [2021-11-02 22:25:51,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 49.361111111111114) internal successors, (1777), 36 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:51,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 79.0) internal successors, (2923), 37 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:51,146 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 79.0) internal successors, (2923), 37 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:51,147 INFO L186 Difference]: Start difference. First operand has 447 places, 817 transitions, 14705 flow. Second operand 36 states and 1777 transitions. [2021-11-02 22:25:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 983 transitions, 20187 flow [2021-11-02 22:25:51,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 983 transitions, 19520 flow, removed 39 selfloop flow, removed 36 redundant places. [2021-11-02 22:25:51,539 INFO L242 Difference]: Finished difference. Result has 449 places, 812 transitions, 14996 flow [2021-11-02 22:25:51,540 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=14084, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14996, PETRI_PLACES=449, PETRI_TRANSITIONS=812} [2021-11-02 22:25:51,541 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 379 predicate places. [2021-11-02 22:25:51,541 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 812 transitions, 14996 flow [2021-11-02 22:25:51,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:51,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:51,542 INFO L254 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] [2021-11-02 22:25:51,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:51,758 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash -164506407, now seen corresponding path program 12 times [2021-11-02 22:25:51,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:51,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868895077] [2021-11-02 22:25:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:51,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:51,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:51,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868895077] [2021-11-02 22:25:51,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868895077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:51,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745155374] [2021-11-02 22:25:51,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:25:51,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:51,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:51,998 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:25:52,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-02 22:25:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:25:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:52,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:53,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745155374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:53,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:53,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:53,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938851571] [2021-11-02 22:25:53,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:53,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:53,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:53,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 812 transitions, 14996 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:53,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:53,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:53,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:55,457 INFO L129 PetriNetUnfolder]: 750/2101 cut-off events. [2021-11-02 22:25:55,457 INFO L130 PetriNetUnfolder]: For 54695/54695 co-relation queries the response was YES. [2021-11-02 22:25:55,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17742 conditions, 2101 events. 750/2101 cut-off events. For 54695/54695 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15900 event pairs, 31 based on Foata normal form. 1/2101 useless extension candidates. Maximal degree in co-relation 17625. Up to 361 conditions per place. [2021-11-02 22:25:55,497 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 385 selfloop transitions, 544 changer transitions 22/985 dead transitions. [2021-11-02 22:25:55,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 985 transitions, 20588 flow [2021-11-02 22:25:55,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 22:25:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-11-02 22:25:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2767 transitions. [2021-11-02 22:25:55,501 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6038847664775208 [2021-11-02 22:25:55,501 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2767 transitions. [2021-11-02 22:25:55,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2767 transitions. [2021-11-02 22:25:55,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:25:55,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2767 transitions. [2021-11-02 22:25:55,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 47.706896551724135) internal successors, (2767), 58 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:55,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 79.0) internal successors, (4661), 59 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:55,515 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 79.0) internal successors, (4661), 59 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:55,515 INFO L186 Difference]: Start difference. First operand has 449 places, 812 transitions, 14996 flow. Second operand 58 states and 2767 transitions. [2021-11-02 22:25:55,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 985 transitions, 20588 flow [2021-11-02 22:25:55,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 985 transitions, 19615 flow, removed 32 selfloop flow, removed 27 redundant places. [2021-11-02 22:25:55,923 INFO L242 Difference]: Finished difference. Result has 480 places, 816 transitions, 15221 flow [2021-11-02 22:25:55,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=14056, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15221, PETRI_PLACES=480, PETRI_TRANSITIONS=816} [2021-11-02 22:25:55,925 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 410 predicate places. [2021-11-02 22:25:55,925 INFO L470 AbstractCegarLoop]: Abstraction has has 480 places, 816 transitions, 15221 flow [2021-11-02 22:25:55,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:55,926 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:25:55,926 INFO L254 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] [2021-11-02 22:25:55,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:25:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 22:25:56,154 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:25:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:25:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2139441153, now seen corresponding path program 13 times [2021-11-02 22:25:56,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:25:56,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523470937] [2021-11-02 22:25:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:25:56,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:25:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:25:56,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523470937] [2021-11-02 22:25:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523470937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:56,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927641450] [2021-11-02 22:25:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:25:56,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:25:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:56,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:25:56,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:25:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:25:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:25:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:25:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:25:57,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927641450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:25:57,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:25:57,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:25:57,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774654290] [2021-11-02 22:25:57,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:25:57,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:25:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:25:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:25:57,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:25:57,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 816 transitions, 15221 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:25:57,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:25:57,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:25:57,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:25:59,974 INFO L129 PetriNetUnfolder]: 742/2081 cut-off events. [2021-11-02 22:25:59,974 INFO L130 PetriNetUnfolder]: For 54912/54912 co-relation queries the response was YES. [2021-11-02 22:26:00,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17771 conditions, 2081 events. 742/2081 cut-off events. For 54912/54912 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15715 event pairs, 31 based on Foata normal form. 1/2081 useless extension candidates. Maximal degree in co-relation 17651. Up to 359 conditions per place. [2021-11-02 22:26:00,019 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 385 selfloop transitions, 530 changer transitions 22/971 dead transitions. [2021-11-02 22:26:00,020 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 971 transitions, 20553 flow [2021-11-02 22:26:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 22:26:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-11-02 22:26:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 2803 transitions. [2021-11-02 22:26:00,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6013730959021669 [2021-11-02 22:26:00,026 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 2803 transitions. [2021-11-02 22:26:00,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 2803 transitions. [2021-11-02 22:26:00,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:00,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 2803 transitions. [2021-11-02 22:26:00,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 47.50847457627118) internal successors, (2803), 59 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:00,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 79.0) internal successors, (4740), 60 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:00,041 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 79.0) internal successors, (4740), 60 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:00,042 INFO L186 Difference]: Start difference. First operand has 480 places, 816 transitions, 15221 flow. Second operand 59 states and 2803 transitions. [2021-11-02 22:26:00,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 971 transitions, 20553 flow [2021-11-02 22:26:00,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 971 transitions, 19581 flow, removed 36 selfloop flow, removed 45 redundant places. [2021-11-02 22:26:00,461 INFO L242 Difference]: Finished difference. Result has 499 places, 806 transitions, 15177 flow [2021-11-02 22:26:00,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=14271, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=15177, PETRI_PLACES=499, PETRI_TRANSITIONS=806} [2021-11-02 22:26:00,462 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 429 predicate places. [2021-11-02 22:26:00,463 INFO L470 AbstractCegarLoop]: Abstraction has has 499 places, 806 transitions, 15177 flow [2021-11-02 22:26:00,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:00,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:00,463 INFO L254 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] [2021-11-02 22:26:00,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:00,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-02 22:26:00,690 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1680103107, now seen corresponding path program 14 times [2021-11-02 22:26:00,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:00,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83476913] [2021-11-02 22:26:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:00,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:00,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:00,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83476913] [2021-11-02 22:26:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83476913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:00,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298273986] [2021-11-02 22:26:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:26:00,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:00,954 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:00,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:26:01,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:26:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:01,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:26:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:02,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298273986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:02,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:02,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:26:02,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239418120] [2021-11-02 22:26:02,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:02,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:02,262 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:02,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 806 transitions, 15177 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:02,264 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:02,264 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:02,264 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:04,773 INFO L129 PetriNetUnfolder]: 734/2055 cut-off events. [2021-11-02 22:26:04,773 INFO L130 PetriNetUnfolder]: For 56723/56723 co-relation queries the response was YES. [2021-11-02 22:26:04,800 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17717 conditions, 2055 events. 734/2055 cut-off events. For 56723/56723 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15397 event pairs, 31 based on Foata normal form. 1/2055 useless extension candidates. Maximal degree in co-relation 17591. Up to 359 conditions per place. [2021-11-02 22:26:04,816 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 388 selfloop transitions, 539 changer transitions 16/977 dead transitions. [2021-11-02 22:26:04,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 977 transitions, 20860 flow [2021-11-02 22:26:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-02 22:26:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-11-02 22:26:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 3197 transitions. [2021-11-02 22:26:04,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6040052900056678 [2021-11-02 22:26:04,821 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 3197 transitions. [2021-11-02 22:26:04,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 3197 transitions. [2021-11-02 22:26:04,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:04,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 3197 transitions. [2021-11-02 22:26:04,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 47.71641791044776) internal successors, (3197), 67 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:04,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 79.0) internal successors, (5372), 68 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:04,835 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 79.0) internal successors, (5372), 68 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:04,835 INFO L186 Difference]: Start difference. First operand has 499 places, 806 transitions, 15177 flow. Second operand 67 states and 3197 transitions. [2021-11-02 22:26:04,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 977 transitions, 20860 flow [2021-11-02 22:26:05,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 977 transitions, 19586 flow, removed 83 selfloop flow, removed 58 redundant places. [2021-11-02 22:26:05,296 INFO L242 Difference]: Finished difference. Result has 503 places, 801 transitions, 15022 flow [2021-11-02 22:26:05,297 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=13961, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=15022, PETRI_PLACES=503, PETRI_TRANSITIONS=801} [2021-11-02 22:26:05,297 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 433 predicate places. [2021-11-02 22:26:05,298 INFO L470 AbstractCegarLoop]: Abstraction has has 503 places, 801 transitions, 15022 flow [2021-11-02 22:26:05,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:05,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:05,298 INFO L254 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] [2021-11-02 22:26:05,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 22:26:05,506 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash 232028347, now seen corresponding path program 15 times [2021-11-02 22:26:05,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:05,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112250940] [2021-11-02 22:26:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:05,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:05,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:05,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112250940] [2021-11-02 22:26:05,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112250940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:05,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123783386] [2021-11-02 22:26:05,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:26:05,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:05,722 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:05,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:26:06,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:26:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:26:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:07,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123783386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:07,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:07,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:26:07,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226643236] [2021-11-02 22:26:07,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:07,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:07,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:07,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 801 transitions, 15022 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:07,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:07,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:07,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:09,922 INFO L129 PetriNetUnfolder]: 743/2101 cut-off events. [2021-11-02 22:26:09,922 INFO L130 PetriNetUnfolder]: For 55837/55837 co-relation queries the response was YES. [2021-11-02 22:26:09,947 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17877 conditions, 2101 events. 743/2101 cut-off events. For 55837/55837 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15983 event pairs, 31 based on Foata normal form. 1/2101 useless extension candidates. Maximal degree in co-relation 17753. Up to 372 conditions per place. [2021-11-02 22:26:09,961 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 376 selfloop transitions, 587 changer transitions 18/1015 dead transitions. [2021-11-02 22:26:09,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1015 transitions, 21321 flow [2021-11-02 22:26:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 22:26:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-11-02 22:26:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3544 transitions. [2021-11-02 22:26:09,965 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5981434599156118 [2021-11-02 22:26:09,965 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3544 transitions. [2021-11-02 22:26:09,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3544 transitions. [2021-11-02 22:26:09,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:09,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3544 transitions. [2021-11-02 22:26:09,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 47.25333333333333) internal successors, (3544), 75 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:09,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 79.0) internal successors, (6004), 76 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:09,980 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 79.0) internal successors, (6004), 76 states have internal predecessors, (6004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:09,980 INFO L186 Difference]: Start difference. First operand has 503 places, 801 transitions, 15022 flow. Second operand 75 states and 3544 transitions. [2021-11-02 22:26:09,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1015 transitions, 21321 flow [2021-11-02 22:26:10,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 1015 transitions, 20128 flow, removed 38 selfloop flow, removed 64 redundant places. [2021-11-02 22:26:10,503 INFO L242 Difference]: Finished difference. Result has 521 places, 853 transitions, 16036 flow [2021-11-02 22:26:10,504 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=13955, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=16036, PETRI_PLACES=521, PETRI_TRANSITIONS=853} [2021-11-02 22:26:10,505 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 451 predicate places. [2021-11-02 22:26:10,505 INFO L470 AbstractCegarLoop]: Abstraction has has 521 places, 853 transitions, 16036 flow [2021-11-02 22:26:10,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:10,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:10,506 INFO L254 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] [2021-11-02 22:26:10,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:10,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 22:26:10,722 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1600480449, now seen corresponding path program 16 times [2021-11-02 22:26:10,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:10,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310589643] [2021-11-02 22:26:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:10,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:10,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:10,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310589643] [2021-11-02 22:26:10,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310589643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:10,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243618448] [2021-11-02 22:26:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:26:10,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:10,914 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:26:11,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:26:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:26:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:12,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243618448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:12,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:12,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:26:12,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970400067] [2021-11-02 22:26:12,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:12,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:12,312 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:12,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 853 transitions, 16036 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:12,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:12,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:12,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:16,073 INFO L129 PetriNetUnfolder]: 743/2120 cut-off events. [2021-11-02 22:26:16,073 INFO L130 PetriNetUnfolder]: For 56235/56235 co-relation queries the response was YES. [2021-11-02 22:26:16,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18211 conditions, 2120 events. 743/2120 cut-off events. For 56235/56235 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16224 event pairs, 37 based on Foata normal form. 1/2120 useless extension candidates. Maximal degree in co-relation 18078. Up to 327 conditions per place. [2021-11-02 22:26:16,128 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 420 selfloop transitions, 586 changer transitions 10/1050 dead transitions. [2021-11-02 22:26:16,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1050 transitions, 22343 flow [2021-11-02 22:26:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-02 22:26:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-11-02 22:26:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 5192 transitions. [2021-11-02 22:26:16,133 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5920857566427187 [2021-11-02 22:26:16,134 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 5192 transitions. [2021-11-02 22:26:16,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 5192 transitions. [2021-11-02 22:26:16,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:16,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 5192 transitions. [2021-11-02 22:26:16,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 46.77477477477478) internal successors, (5192), 111 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:16,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 79.0) internal successors, (8848), 112 states have internal predecessors, (8848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:16,155 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 79.0) internal successors, (8848), 112 states have internal predecessors, (8848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:16,156 INFO L186 Difference]: Start difference. First operand has 521 places, 853 transitions, 16036 flow. Second operand 111 states and 5192 transitions. [2021-11-02 22:26:16,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1050 transitions, 22343 flow [2021-11-02 22:26:16,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 1050 transitions, 21107 flow, removed 191 selfloop flow, removed 53 redundant places. [2021-11-02 22:26:16,555 INFO L242 Difference]: Finished difference. Result has 579 places, 884 transitions, 16694 flow [2021-11-02 22:26:16,557 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=15033, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=16694, PETRI_PLACES=579, PETRI_TRANSITIONS=884} [2021-11-02 22:26:16,557 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 509 predicate places. [2021-11-02 22:26:16,557 INFO L470 AbstractCegarLoop]: Abstraction has has 579 places, 884 transitions, 16694 flow [2021-11-02 22:26:16,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:16,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:16,558 INFO L254 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] [2021-11-02 22:26:16,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:16,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:26:16,786 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:16,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash 173980563, now seen corresponding path program 17 times [2021-11-02 22:26:16,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:16,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165854152] [2021-11-02 22:26:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:16,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:16,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:16,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165854152] [2021-11-02 22:26:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165854152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:16,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998775413] [2021-11-02 22:26:16,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:26:16,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:16,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:16,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:26:17,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 22:26:17,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:17,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:26:17,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:18,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998775413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:18,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:18,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:26:18,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196107562] [2021-11-02 22:26:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:18,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:18,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:18,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 884 transitions, 16694 flow. Second operand has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:18,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:18,225 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:18,225 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:20,387 INFO L129 PetriNetUnfolder]: 1074/2815 cut-off events. [2021-11-02 22:26:20,387 INFO L130 PetriNetUnfolder]: For 77445/77445 co-relation queries the response was YES. [2021-11-02 22:26:20,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25601 conditions, 2815 events. 1074/2815 cut-off events. For 77445/77445 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 21870 event pairs, 31 based on Foata normal form. 1/2815 useless extension candidates. Maximal degree in co-relation 25468. Up to 423 conditions per place. [2021-11-02 22:26:20,455 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 465 selfloop transitions, 913 changer transitions 19/1431 dead transitions. [2021-11-02 22:26:20,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 1431 transitions, 30524 flow [2021-11-02 22:26:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 22:26:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-11-02 22:26:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2335 transitions. [2021-11-02 22:26:20,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6032033066391114 [2021-11-02 22:26:20,458 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2335 transitions. [2021-11-02 22:26:20,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2335 transitions. [2021-11-02 22:26:20,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:20,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2335 transitions. [2021-11-02 22:26:20,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 47.6530612244898) internal successors, (2335), 49 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:20,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 79.0) internal successors, (3950), 50 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:20,468 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 79.0) internal successors, (3950), 50 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:20,468 INFO L186 Difference]: Start difference. First operand has 579 places, 884 transitions, 16694 flow. Second operand 49 states and 2335 transitions. [2021-11-02 22:26:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 1431 transitions, 30524 flow [2021-11-02 22:26:21,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1431 transitions, 29377 flow, removed 19 selfloop flow, removed 74 redundant places. [2021-11-02 22:26:21,093 INFO L242 Difference]: Finished difference. Result has 571 places, 1290 transitions, 26737 flow [2021-11-02 22:26:21,094 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=15964, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=520, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26737, PETRI_PLACES=571, PETRI_TRANSITIONS=1290} [2021-11-02 22:26:21,094 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 501 predicate places. [2021-11-02 22:26:21,095 INFO L470 AbstractCegarLoop]: Abstraction has has 571 places, 1290 transitions, 26737 flow [2021-11-02 22:26:21,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:21,095 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:21,095 INFO L254 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] [2021-11-02 22:26:21,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:21,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-02 22:26:21,296 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:21,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -610212803, now seen corresponding path program 18 times [2021-11-02 22:26:21,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:21,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766730505] [2021-11-02 22:26:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:21,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:21,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:21,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766730505] [2021-11-02 22:26:21,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766730505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:21,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772908655] [2021-11-02 22:26:21,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:26:21,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:21,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:21,499 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:21,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:26:22,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 22:26:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:26:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:22,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772908655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:22,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:22,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:26:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625032415] [2021-11-02 22:26:22,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:22,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:22,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:22,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 1290 transitions, 26737 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:22,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:22,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:22,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:26,069 INFO L129 PetriNetUnfolder]: 1398/3452 cut-off events. [2021-11-02 22:26:26,069 INFO L130 PetriNetUnfolder]: For 115747/115747 co-relation queries the response was YES. [2021-11-02 22:26:26,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35125 conditions, 3452 events. 1398/3452 cut-off events. For 115747/115747 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27221 event pairs, 31 based on Foata normal form. 1/3452 useless extension candidates. Maximal degree in co-relation 34973. Up to 516 conditions per place. [2021-11-02 22:26:26,164 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 480 selfloop transitions, 1372 changer transitions 18/1904 dead transitions. [2021-11-02 22:26:26,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1904 transitions, 43524 flow [2021-11-02 22:26:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-02 22:26:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-11-02 22:26:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3055 transitions. [2021-11-02 22:26:26,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5949367088607594 [2021-11-02 22:26:26,167 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3055 transitions. [2021-11-02 22:26:26,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3055 transitions. [2021-11-02 22:26:26,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:26,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3055 transitions. [2021-11-02 22:26:26,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 47.0) internal successors, (3055), 65 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:26,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 79.0) internal successors, (5214), 66 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:26,180 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 79.0) internal successors, (5214), 66 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:26,180 INFO L186 Difference]: Start difference. First operand has 571 places, 1290 transitions, 26737 flow. Second operand 65 states and 3055 transitions. [2021-11-02 22:26:26,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1904 transitions, 43524 flow [2021-11-02 22:26:27,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 1904 transitions, 42712 flow, removed 229 selfloop flow, removed 11 redundant places. [2021-11-02 22:26:27,620 INFO L242 Difference]: Finished difference. Result has 641 places, 1781 transitions, 40626 flow [2021-11-02 22:26:27,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=26138, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=922, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=40626, PETRI_PLACES=641, PETRI_TRANSITIONS=1781} [2021-11-02 22:26:27,622 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 571 predicate places. [2021-11-02 22:26:27,622 INFO L470 AbstractCegarLoop]: Abstraction has has 641 places, 1781 transitions, 40626 flow [2021-11-02 22:26:27,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:27,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:27,623 INFO L254 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] [2021-11-02 22:26:27,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:27,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 22:26:27,838 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash 757871317, now seen corresponding path program 19 times [2021-11-02 22:26:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:27,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296292586] [2021-11-02 22:26:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:27,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:28,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:28,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296292586] [2021-11-02 22:26:28,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296292586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:28,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131727216] [2021-11-02 22:26:28,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:26:28,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:28,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:28,066 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:28,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:26:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:28,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:26:28,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:29,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131727216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:29,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:29,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:26:29,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120300903] [2021-11-02 22:26:29,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:29,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:29,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:29,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:29,423 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:29,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 641 places, 1781 transitions, 40626 flow. Second operand has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:29,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:29,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:29,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:32,799 INFO L129 PetriNetUnfolder]: 1393/3410 cut-off events. [2021-11-02 22:26:32,799 INFO L130 PetriNetUnfolder]: For 130346/130346 co-relation queries the response was YES. [2021-11-02 22:26:32,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37482 conditions, 3410 events. 1393/3410 cut-off events. For 130346/130346 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26684 event pairs, 92 based on Foata normal form. 1/3410 useless extension candidates. Maximal degree in co-relation 37313. Up to 1925 conditions per place. [2021-11-02 22:26:32,883 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1322 selfloop transitions, 466 changer transitions 5/1827 dead transitions. [2021-11-02 22:26:32,883 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 1827 transitions, 45233 flow [2021-11-02 22:26:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:26:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 22:26:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1154 transitions. [2021-11-02 22:26:32,885 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6086497890295358 [2021-11-02 22:26:32,885 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1154 transitions. [2021-11-02 22:26:32,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1154 transitions. [2021-11-02 22:26:32,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:32,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1154 transitions. [2021-11-02 22:26:32,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 48.083333333333336) internal successors, (1154), 24 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:32,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:32,890 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:32,890 INFO L186 Difference]: Start difference. First operand has 641 places, 1781 transitions, 40626 flow. Second operand 24 states and 1154 transitions. [2021-11-02 22:26:32,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 1827 transitions, 45233 flow [2021-11-02 22:26:34,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1827 transitions, 43863 flow, removed 284 selfloop flow, removed 31 redundant places. [2021-11-02 22:26:34,340 INFO L242 Difference]: Finished difference. Result has 636 places, 1786 transitions, 40308 flow [2021-11-02 22:26:34,342 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=39271, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=40308, PETRI_PLACES=636, PETRI_TRANSITIONS=1786} [2021-11-02 22:26:34,342 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 566 predicate places. [2021-11-02 22:26:34,342 INFO L470 AbstractCegarLoop]: Abstraction has has 636 places, 1786 transitions, 40308 flow [2021-11-02 22:26:34,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:34,342 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:34,342 INFO L254 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] [2021-11-02 22:26:34,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-02 22:26:34,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:34,554 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash -729129121, now seen corresponding path program 20 times [2021-11-02 22:26:34,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:34,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935976457] [2021-11-02 22:26:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:34,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:34,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:34,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935976457] [2021-11-02 22:26:34,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935976457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:34,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027418648] [2021-11-02 22:26:34,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:26:34,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:34,782 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:34,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:26:35,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:26:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:26:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027418648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:36,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:26:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265915388] [2021-11-02 22:26:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:36,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:36,350 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:36,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1786 transitions, 40308 flow. Second operand has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:36,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:36,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:36,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:40,836 INFO L129 PetriNetUnfolder]: 1768/4229 cut-off events. [2021-11-02 22:26:40,836 INFO L130 PetriNetUnfolder]: For 136205/136205 co-relation queries the response was YES. [2021-11-02 22:26:40,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45687 conditions, 4229 events. 1768/4229 cut-off events. For 136205/136205 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34402 event pairs, 86 based on Foata normal form. 1/4227 useless extension candidates. Maximal degree in co-relation 45517. Up to 2213 conditions per place. [2021-11-02 22:26:40,935 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1644 selfloop transitions, 796 changer transitions 9/2483 dead transitions. [2021-11-02 22:26:40,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 2483 transitions, 60983 flow [2021-11-02 22:26:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 22:26:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-11-02 22:26:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2042 transitions. [2021-11-02 22:26:40,937 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.601118634088902 [2021-11-02 22:26:40,937 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2042 transitions. [2021-11-02 22:26:40,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2042 transitions. [2021-11-02 22:26:40,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:40,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2042 transitions. [2021-11-02 22:26:40,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 47.48837209302326) internal successors, (2042), 43 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:40,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 79.0) internal successors, (3476), 44 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:40,941 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 79.0) internal successors, (3476), 44 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:40,941 INFO L186 Difference]: Start difference. First operand has 636 places, 1786 transitions, 40308 flow. Second operand 43 states and 2042 transitions. [2021-11-02 22:26:40,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 2483 transitions, 60983 flow [2021-11-02 22:26:42,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 658 places, 2483 transitions, 60189 flow, removed 19 selfloop flow, removed 16 redundant places. [2021-11-02 22:26:42,563 INFO L242 Difference]: Finished difference. Result has 672 places, 2184 transitions, 51537 flow [2021-11-02 22:26:42,564 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=39738, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=51537, PETRI_PLACES=672, PETRI_TRANSITIONS=2184} [2021-11-02 22:26:42,565 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 602 predicate places. [2021-11-02 22:26:42,565 INFO L470 AbstractCegarLoop]: Abstraction has has 672 places, 2184 transitions, 51537 flow [2021-11-02 22:26:42,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:42,565 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:42,565 INFO L254 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] [2021-11-02 22:26:42,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:42,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:42,766 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:42,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1699450771, now seen corresponding path program 21 times [2021-11-02 22:26:42,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:42,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177164389] [2021-11-02 22:26:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:42,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:42,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:42,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177164389] [2021-11-02 22:26:42,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177164389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:42,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510835394] [2021-11-02 22:26:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:26:42,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:42,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:42,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:42,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:26:43,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:26:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:26:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:44,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510835394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:44,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:44,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:26:44,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101063068] [2021-11-02 22:26:44,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:26:44,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:26:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:26:44,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:44,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 2184 transitions, 51537 flow. Second operand has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:44,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:44,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:44,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:49,563 INFO L129 PetriNetUnfolder]: 1850/4446 cut-off events. [2021-11-02 22:26:49,563 INFO L130 PetriNetUnfolder]: For 143206/143206 co-relation queries the response was YES. [2021-11-02 22:26:49,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48932 conditions, 4446 events. 1850/4446 cut-off events. For 143206/143206 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36805 event pairs, 86 based on Foata normal form. 1/4444 useless extension candidates. Maximal degree in co-relation 48751. Up to 2656 conditions per place. [2021-11-02 22:26:49,695 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1666 selfloop transitions, 663 changer transitions 7/2370 dead transitions. [2021-11-02 22:26:49,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 2370 transitions, 60036 flow [2021-11-02 22:26:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:26:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-11-02 22:26:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 1874 transitions. [2021-11-02 22:26:49,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5930379746835444 [2021-11-02 22:26:49,698 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 1874 transitions. [2021-11-02 22:26:49,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 1874 transitions. [2021-11-02 22:26:49,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:49,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 1874 transitions. [2021-11-02 22:26:49,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 46.85) internal successors, (1874), 40 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:49,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:49,705 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 79.0) internal successors, (3239), 41 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:49,706 INFO L186 Difference]: Start difference. First operand has 672 places, 2184 transitions, 51537 flow. Second operand 40 states and 1874 transitions. [2021-11-02 22:26:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 2370 transitions, 60036 flow [2021-11-02 22:26:51,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 2370 transitions, 59439 flow, removed 45 selfloop flow, removed 7 redundant places. [2021-11-02 22:26:51,760 INFO L242 Difference]: Finished difference. Result has 720 places, 2336 transitions, 55955 flow [2021-11-02 22:26:51,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=51011, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=55955, PETRI_PLACES=720, PETRI_TRANSITIONS=2336} [2021-11-02 22:26:51,763 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 650 predicate places. [2021-11-02 22:26:51,764 INFO L470 AbstractCegarLoop]: Abstraction has has 720 places, 2336 transitions, 55955 flow [2021-11-02 22:26:51,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:51,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:26:51,764 INFO L254 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] [2021-11-02 22:26:51,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:26:51,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 22:26:51,978 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:26:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:51,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1789749567, now seen corresponding path program 22 times [2021-11-02 22:26:51,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:51,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949939704] [2021-11-02 22:26:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:51,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:52,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:52,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949939704] [2021-11-02 22:26:52,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949939704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:52,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132531418] [2021-11-02 22:26:52,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:26:52,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:26:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:26:52,189 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:26:52,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:26:53,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:26:53,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:26:53,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:26:53,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:26:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:53,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132531418] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:26:53,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:26:53,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2021-11-02 22:26:53,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576968545] [2021-11-02 22:26:53,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:26:53,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:26:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:26:53,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:26:53,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2336 transitions, 55955 flow. Second operand has 24 states, 24 states have (on average 44.75) internal successors, (1074), 24 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:53,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:26:53,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:26:53,714 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:26:59,532 INFO L129 PetriNetUnfolder]: 1916/4631 cut-off events. [2021-11-02 22:26:59,533 INFO L130 PetriNetUnfolder]: For 151036/151036 co-relation queries the response was YES. [2021-11-02 22:26:59,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51563 conditions, 4631 events. 1916/4631 cut-off events. For 151036/151036 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38917 event pairs, 88 based on Foata normal form. 3/4631 useless extension candidates. Maximal degree in co-relation 51365. Up to 2729 conditions per place. [2021-11-02 22:26:59,666 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1756 selfloop transitions, 709 changer transitions 10/2509 dead transitions. [2021-11-02 22:26:59,666 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 2509 transitions, 64731 flow [2021-11-02 22:26:59,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 22:26:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-11-02 22:26:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1927 transitions. [2021-11-02 22:26:59,668 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5949367088607594 [2021-11-02 22:26:59,668 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 1927 transitions. [2021-11-02 22:26:59,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 1927 transitions. [2021-11-02 22:26:59,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:26:59,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 1927 transitions. [2021-11-02 22:26:59,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 47.0) internal successors, (1927), 41 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:59,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 79.0) internal successors, (3318), 42 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:59,672 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 79.0) internal successors, (3318), 42 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:59,673 INFO L186 Difference]: Start difference. First operand has 720 places, 2336 transitions, 55955 flow. Second operand 41 states and 1927 transitions. [2021-11-02 22:26:59,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 2509 transitions, 64731 flow [2021-11-02 22:27:01,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 2509 transitions, 64499 flow, removed 36 selfloop flow, removed 12 redundant places. [2021-11-02 22:27:01,922 INFO L242 Difference]: Finished difference. Result has 758 places, 2449 transitions, 60129 flow [2021-11-02 22:27:01,925 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=55752, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=60129, PETRI_PLACES=758, PETRI_TRANSITIONS=2449} [2021-11-02 22:27:01,925 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 688 predicate places. [2021-11-02 22:27:01,925 INFO L470 AbstractCegarLoop]: Abstraction has has 758 places, 2449 transitions, 60129 flow [2021-11-02 22:27:01,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 44.75) internal successors, (1074), 24 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:01,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:27:01,925 INFO L254 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] [2021-11-02 22:27:01,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:02,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 22:27:02,126 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:27:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash 744330903, now seen corresponding path program 23 times [2021-11-02 22:27:02,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:02,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800357751] [2021-11-02 22:27:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:02,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:02,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:02,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800357751] [2021-11-02 22:27:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800357751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:02,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86366116] [2021-11-02 22:27:02,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:27:02,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:02,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:02,313 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:02,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:27:03,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 22:27:03,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:27:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86366116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:03,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:27:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004951719] [2021-11-02 22:27:03,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:27:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:27:03,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:27:03,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:27:03,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 2449 transitions, 60129 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:03,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:27:03,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:27:03,691 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:27:11,226 INFO L129 PetriNetUnfolder]: 2611/6069 cut-off events. [2021-11-02 22:27:11,226 INFO L130 PetriNetUnfolder]: For 208769/208769 co-relation queries the response was YES. [2021-11-02 22:27:11,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70877 conditions, 6069 events. 2611/6069 cut-off events. For 208769/208769 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 52460 event pairs, 58 based on Foata normal form. 1/6067 useless extension candidates. Maximal degree in co-relation 70669. Up to 1335 conditions per place. [2021-11-02 22:27:11,437 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1147 selfloop transitions, 2272 changer transitions 19/3472 dead transitions. [2021-11-02 22:27:11,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 3472 transitions, 92723 flow [2021-11-02 22:27:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:27:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-02 22:27:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1538 transitions. [2021-11-02 22:27:11,450 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6083860759493671 [2021-11-02 22:27:11,450 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1538 transitions. [2021-11-02 22:27:11,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1538 transitions. [2021-11-02 22:27:11,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:27:11,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1538 transitions. [2021-11-02 22:27:11,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 48.0625) internal successors, (1538), 32 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:11,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 79.0) internal successors, (2607), 33 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:11,454 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 79.0) internal successors, (2607), 33 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:11,454 INFO L186 Difference]: Start difference. First operand has 758 places, 2449 transitions, 60129 flow. Second operand 32 states and 1538 transitions. [2021-11-02 22:27:11,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 3472 transitions, 92723 flow [2021-11-02 22:27:14,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 3472 transitions, 92058 flow, removed 34 selfloop flow, removed 12 redundant places. [2021-11-02 22:27:14,666 INFO L242 Difference]: Finished difference. Result has 793 places, 3315 transitions, 89928 flow [2021-11-02 22:27:14,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=59612, PETRI_DIFFERENCE_MINUEND_PLACES=742, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=89928, PETRI_PLACES=793, PETRI_TRANSITIONS=3315} [2021-11-02 22:27:14,670 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 723 predicate places. [2021-11-02 22:27:14,670 INFO L470 AbstractCegarLoop]: Abstraction has has 793 places, 3315 transitions, 89928 flow [2021-11-02 22:27:14,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:14,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:27:14,671 INFO L254 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] [2021-11-02 22:27:14,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:14,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 22:27:14,898 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:27:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -873450845, now seen corresponding path program 24 times [2021-11-02 22:27:14,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:14,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354284396] [2021-11-02 22:27:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:14,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:15,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:15,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354284396] [2021-11-02 22:27:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354284396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:15,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631075133] [2021-11-02 22:27:15,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:27:15,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:15,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:15,108 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:15,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:27:16,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 22:27:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:27:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:27:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631075133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:16,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:16,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:27:16,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712948639] [2021-11-02 22:27:16,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:27:16,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:27:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:27:16,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:27:16,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 3315 transitions, 89928 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:16,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:27:16,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:27:16,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:27:29,985 INFO L129 PetriNetUnfolder]: 3537/7969 cut-off events. [2021-11-02 22:27:29,985 INFO L130 PetriNetUnfolder]: For 325322/325322 co-relation queries the response was YES. [2021-11-02 22:27:30,277 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101453 conditions, 7969 events. 3537/7969 cut-off events. For 325322/325322 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 70950 event pairs, 65 based on Foata normal form. 1/7967 useless extension candidates. Maximal degree in co-relation 101228. Up to 2049 conditions per place. [2021-11-02 22:27:30,356 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 1536 selfloop transitions, 2988 changer transitions 19/4577 dead transitions. [2021-11-02 22:27:30,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 4577 transitions, 133231 flow [2021-11-02 22:27:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:27:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-02 22:27:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1772 transitions. [2021-11-02 22:27:30,358 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6062264796442012 [2021-11-02 22:27:30,358 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1772 transitions. [2021-11-02 22:27:30,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1772 transitions. [2021-11-02 22:27:30,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:27:30,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1772 transitions. [2021-11-02 22:27:30,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 47.891891891891895) internal successors, (1772), 37 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:30,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 79.0) internal successors, (3002), 38 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:30,362 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 79.0) internal successors, (3002), 38 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:30,362 INFO L186 Difference]: Start difference. First operand has 793 places, 3315 transitions, 89928 flow. Second operand 37 states and 1772 transitions. [2021-11-02 22:27:30,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 4577 transitions, 133231 flow [2021-11-02 22:27:36,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 4577 transitions, 132209 flow, removed 240 selfloop flow, removed 5 redundant places. [2021-11-02 22:27:36,236 INFO L242 Difference]: Finished difference. Result has 837 places, 4426 transitions, 129707 flow [2021-11-02 22:27:36,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=89281, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1900, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=129707, PETRI_PLACES=837, PETRI_TRANSITIONS=4426} [2021-11-02 22:27:36,240 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 767 predicate places. [2021-11-02 22:27:36,240 INFO L470 AbstractCegarLoop]: Abstraction has has 837 places, 4426 transitions, 129707 flow [2021-11-02 22:27:36,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:36,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:27:36,240 INFO L254 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] [2021-11-02 22:27:36,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:36,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:36,441 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:27:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 707102541, now seen corresponding path program 25 times [2021-11-02 22:27:36,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:36,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225611196] [2021-11-02 22:27:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:36,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:36,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:36,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225611196] [2021-11-02 22:27:36,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225611196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:36,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095188288] [2021-11-02 22:27:36,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:27:36,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:36,635 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:27:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:27:37,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:38,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095188288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:38,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:38,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:27:38,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514575902] [2021-11-02 22:27:38,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:27:38,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:27:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:27:38,079 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:27:38,080 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 4426 transitions, 129707 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:38,080 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:27:38,080 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:27:38,080 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:27:55,508 INFO L129 PetriNetUnfolder]: 3641/8187 cut-off events. [2021-11-02 22:27:55,508 INFO L130 PetriNetUnfolder]: For 369917/369917 co-relation queries the response was YES. [2021-11-02 22:27:55,715 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110273 conditions, 8187 events. 3641/8187 cut-off events. For 369917/369917 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 73263 event pairs, 135 based on Foata normal form. 1/8185 useless extension candidates. Maximal degree in co-relation 110035. Up to 5304 conditions per place. [2021-11-02 22:27:55,799 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 3391 selfloop transitions, 1245 changer transitions 7/4677 dead transitions. [2021-11-02 22:27:55,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 877 places, 4677 transitions, 146094 flow [2021-11-02 22:27:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 22:27:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-02 22:27:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2073 transitions. [2021-11-02 22:27:55,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5963751438434983 [2021-11-02 22:27:55,801 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2073 transitions. [2021-11-02 22:27:55,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2073 transitions. [2021-11-02 22:27:55,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:27:55,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2073 transitions. [2021-11-02 22:27:55,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 47.11363636363637) internal successors, (2073), 44 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:55,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 79.0) internal successors, (3555), 45 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:55,806 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 79.0) internal successors, (3555), 45 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:27:55,806 INFO L186 Difference]: Start difference. First operand has 837 places, 4426 transitions, 129707 flow. Second operand 44 states and 2073 transitions. [2021-11-02 22:27:55,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 877 places, 4677 transitions, 146094 flow [2021-11-02 22:28:02,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 871 places, 4677 transitions, 145306 flow, removed 100 selfloop flow, removed 6 redundant places. [2021-11-02 22:28:03,099 INFO L242 Difference]: Finished difference. Result has 883 places, 4612 transitions, 137531 flow [2021-11-02 22:28:03,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=128931, PETRI_DIFFERENCE_MINUEND_PLACES=828, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=137531, PETRI_PLACES=883, PETRI_TRANSITIONS=4612} [2021-11-02 22:28:03,103 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 813 predicate places. [2021-11-02 22:28:03,103 INFO L470 AbstractCegarLoop]: Abstraction has has 883 places, 4612 transitions, 137531 flow [2021-11-02 22:28:03,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:03,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:28:03,104 INFO L254 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] [2021-11-02 22:28:03,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-02 22:28:03,304 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:28:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash -396273231, now seen corresponding path program 26 times [2021-11-02 22:28:03,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:03,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766543284] [2021-11-02 22:28:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:03,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:03,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:03,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766543284] [2021-11-02 22:28:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766543284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:03,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513442229] [2021-11-02 22:28:03,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:28:03,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:03,549 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:28:04,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:28:04,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:28:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:05,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513442229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:05,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:05,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:28:05,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526794663] [2021-11-02 22:28:05,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:28:05,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:28:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:28:05,020 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:28:05,021 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 883 places, 4612 transitions, 137531 flow. Second operand has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:05,021 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:28:05,021 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:28:05,021 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:28:23,165 INFO L129 PetriNetUnfolder]: 3641/8211 cut-off events. [2021-11-02 22:28:23,165 INFO L130 PetriNetUnfolder]: For 382016/382016 co-relation queries the response was YES. [2021-11-02 22:28:23,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111414 conditions, 8211 events. 3641/8211 cut-off events. For 382016/382016 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 73724 event pairs, 136 based on Foata normal form. 1/8209 useless extension candidates. Maximal degree in co-relation 111167. Up to 5501 conditions per place. [2021-11-02 22:28:23,642 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 3568 selfloop transitions, 1038 changer transitions 7/4647 dead transitions. [2021-11-02 22:28:23,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 909 places, 4647 transitions, 147440 flow [2021-11-02 22:28:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:28:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 22:28:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1466 transitions. [2021-11-02 22:28:23,643 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5986116782360147 [2021-11-02 22:28:23,644 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1466 transitions. [2021-11-02 22:28:23,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1466 transitions. [2021-11-02 22:28:23,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:28:23,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1466 transitions. [2021-11-02 22:28:23,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 47.29032258064516) internal successors, (1466), 31 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:23,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 79.0) internal successors, (2528), 32 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:23,647 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 79.0) internal successors, (2528), 32 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:23,647 INFO L186 Difference]: Start difference. First operand has 883 places, 4612 transitions, 137531 flow. Second operand 31 states and 1466 transitions. [2021-11-02 22:28:23,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 909 places, 4647 transitions, 147440 flow [2021-11-02 22:28:30,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 896 places, 4647 transitions, 147255 flow, removed 39 selfloop flow, removed 13 redundant places. [2021-11-02 22:28:31,114 INFO L242 Difference]: Finished difference. Result has 902 places, 4621 transitions, 139629 flow [2021-11-02 22:28:31,118 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=137354, PETRI_DIFFERENCE_MINUEND_PLACES=866, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=139629, PETRI_PLACES=902, PETRI_TRANSITIONS=4621} [2021-11-02 22:28:31,118 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 832 predicate places. [2021-11-02 22:28:31,118 INFO L470 AbstractCegarLoop]: Abstraction has has 902 places, 4621 transitions, 139629 flow [2021-11-02 22:28:31,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.76) internal successors, (1119), 25 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:31,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:28:31,119 INFO L254 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] [2021-11-02 22:28:31,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:31,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 22:28:31,319 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:28:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1815279535, now seen corresponding path program 27 times [2021-11-02 22:28:31,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:31,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211669053] [2021-11-02 22:28:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:31,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:31,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:31,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211669053] [2021-11-02 22:28:31,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211669053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:31,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714260508] [2021-11-02 22:28:31,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:28:31,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:31,521 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:31,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:28:32,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:28:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:28:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:28:32,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:33,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714260508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:33,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:33,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-11-02 22:28:33,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414336070] [2021-11-02 22:28:33,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:28:33,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:28:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:28:33,022 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:28:33,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 902 places, 4621 transitions, 139629 flow. Second operand has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:33,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:28:33,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:28:33,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:28:55,798 INFO L129 PetriNetUnfolder]: 3641/8218 cut-off events. [2021-11-02 22:28:55,798 INFO L130 PetriNetUnfolder]: For 395525/395525 co-relation queries the response was YES. [2021-11-02 22:28:56,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112844 conditions, 8218 events. 3641/8218 cut-off events. For 395525/395525 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 73888 event pairs, 136 based on Foata normal form. 1/8216 useless extension candidates. Maximal degree in co-relation 112596. Up to 5504 conditions per place. [2021-11-02 22:28:56,509 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 3575 selfloop transitions, 1033 changer transitions 14/4656 dead transitions. [2021-11-02 22:28:56,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 4656 transitions, 149573 flow [2021-11-02 22:28:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:28:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-02 22:28:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1460 transitions. [2021-11-02 22:28:56,511 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5961616986525112 [2021-11-02 22:28:56,511 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1460 transitions. [2021-11-02 22:28:56,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1460 transitions. [2021-11-02 22:28:56,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:28:56,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1460 transitions. [2021-11-02 22:28:56,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 47.096774193548384) internal successors, (1460), 31 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:56,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 79.0) internal successors, (2528), 32 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:56,514 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 79.0) internal successors, (2528), 32 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:28:56,515 INFO L186 Difference]: Start difference. First operand has 902 places, 4621 transitions, 139629 flow. Second operand 31 states and 1460 transitions. [2021-11-02 22:28:56,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 4656 transitions, 149573 flow [2021-11-02 22:29:05,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 909 places, 4656 transitions, 148211 flow, removed 33 selfloop flow, removed 19 redundant places. [2021-11-02 22:29:05,634 INFO L242 Difference]: Finished difference. Result has 921 places, 4626 transitions, 140493 flow [2021-11-02 22:29:05,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=138277, PETRI_DIFFERENCE_MINUEND_PLACES=879, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=140493, PETRI_PLACES=921, PETRI_TRANSITIONS=4626} [2021-11-02 22:29:05,640 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 851 predicate places. [2021-11-02 22:29:05,640 INFO L470 AbstractCegarLoop]: Abstraction has has 921 places, 4626 transitions, 140493 flow [2021-11-02 22:29:05,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.68) internal successors, (1117), 25 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:05,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:29:05,641 INFO L254 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] [2021-11-02 22:29:05,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:05,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:05,854 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:29:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -642465205, now seen corresponding path program 28 times [2021-11-02 22:29:05,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:05,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210692534] [2021-11-02 22:29:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:05,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:06,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:06,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210692534] [2021-11-02 22:29:06,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210692534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:06,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811955956] [2021-11-02 22:29:06,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:29:06,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:06,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:06,104 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:06,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:29:07,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:29:07,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:29:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:29:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:07,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811955956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:07,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:07,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:29:07,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768763337] [2021-11-02 22:29:07,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:29:07,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:29:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:29:07,957 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:29:07,959 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 4626 transitions, 140493 flow. Second operand has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:07,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:29:07,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:29:07,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:29:40,074 INFO L129 PetriNetUnfolder]: 5469/11675 cut-off events. [2021-11-02 22:29:40,074 INFO L130 PetriNetUnfolder]: For 618910/618910 co-relation queries the response was YES. [2021-11-02 22:29:40,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168001 conditions, 11675 events. 5469/11675 cut-off events. For 618910/618910 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 104176 event pairs, 158 based on Foata normal form. 28/11699 useless extension candidates. Maximal degree in co-relation 167744. Up to 5711 conditions per place. [2021-11-02 22:29:41,094 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 4154 selfloop transitions, 3032 changer transitions 102/7322 dead transitions. [2021-11-02 22:29:41,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 7322 transitions, 233391 flow [2021-11-02 22:29:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 22:29:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-11-02 22:29:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2560 transitions. [2021-11-02 22:29:41,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6000937646507267 [2021-11-02 22:29:41,097 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2560 transitions. [2021-11-02 22:29:41,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2560 transitions. [2021-11-02 22:29:41,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:29:41,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2560 transitions. [2021-11-02 22:29:41,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 47.407407407407405) internal successors, (2560), 54 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:41,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 79.0) internal successors, (4345), 55 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:41,104 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 79.0) internal successors, (4345), 55 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:41,104 INFO L186 Difference]: Start difference. First operand has 921 places, 4626 transitions, 140493 flow. Second operand 54 states and 2560 transitions. [2021-11-02 22:29:41,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 7322 transitions, 233391 flow [2021-11-02 22:29:55,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 7322 transitions, 230414 flow, removed 30 selfloop flow, removed 25 redundant places. [2021-11-02 22:29:55,291 INFO L242 Difference]: Finished difference. Result has 985 places, 6547 transitions, 209017 flow [2021-11-02 22:29:55,297 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=138404, PETRI_DIFFERENCE_MINUEND_PLACES=887, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=209017, PETRI_PLACES=985, PETRI_TRANSITIONS=6547} [2021-11-02 22:29:55,297 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 915 predicate places. [2021-11-02 22:29:55,297 INFO L470 AbstractCegarLoop]: Abstraction has has 985 places, 6547 transitions, 209017 flow [2021-11-02 22:29:55,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.8) internal successors, (1120), 25 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:55,298 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:29:55,298 INFO L254 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] [2021-11-02 22:29:55,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:55,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:55,508 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:29:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1704765815, now seen corresponding path program 29 times [2021-11-02 22:29:55,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:55,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741469074] [2021-11-02 22:29:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:55,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:55,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:55,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741469074] [2021-11-02 22:29:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741469074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:55,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993064297] [2021-11-02 22:29:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:29:55,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:55,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:55,757 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:55,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:29:56,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 22:29:56,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:29:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:29:56,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:57,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993064297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:57,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:57,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-11-02 22:29:57,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522025425] [2021-11-02 22:29:57,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:29:57,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:29:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:29:57,501 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:29:57,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 985 places, 6547 transitions, 209017 flow. Second operand has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:29:57,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:29:57,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:29:57,502 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:30:57,480 INFO L129 PetriNetUnfolder]: 6995/14421 cut-off events. [2021-11-02 22:30:57,481 INFO L130 PetriNetUnfolder]: For 873540/873540 co-relation queries the response was YES. [2021-11-02 22:30:58,358 INFO L84 FinitePrefix]: Finished finitePrefix Result has 223833 conditions, 14421 events. 6995/14421 cut-off events. For 873540/873540 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 129279 event pairs, 83 based on Foata normal form. 1/14418 useless extension candidates. Maximal degree in co-relation 223540. Up to 4921 conditions per place. [2021-11-02 22:30:58,676 INFO L132 encePairwiseOnDemand]: 61/79 looper letters, 3249 selfloop transitions, 5317 changer transitions 36/8636 dead transitions. [2021-11-02 22:30:58,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 8636 transitions, 293762 flow [2021-11-02 22:30:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 22:30:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-11-02 22:30:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1857 transitions. [2021-11-02 22:30:58,678 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6027263875365141 [2021-11-02 22:30:58,678 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1857 transitions. [2021-11-02 22:30:58,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1857 transitions. [2021-11-02 22:30:58,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:30:58,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1857 transitions. [2021-11-02 22:30:58,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 47.61538461538461) internal successors, (1857), 39 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:58,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:58,683 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 79.0) internal successors, (3160), 40 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:30:58,683 INFO L186 Difference]: Start difference. First operand has 985 places, 6547 transitions, 209017 flow. Second operand 39 states and 1857 transitions. [2021-11-02 22:30:58,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 8636 transitions, 293762 flow [2021-11-02 22:31:23,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1014 places, 8636 transitions, 289951 flow, removed 1863 selfloop flow, removed 6 redundant places. [2021-11-02 22:31:23,730 INFO L242 Difference]: Finished difference. Result has 1034 places, 8131 transitions, 275262 flow [2021-11-02 22:31:23,738 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=206705, PETRI_DIFFERENCE_MINUEND_PLACES=976, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=275262, PETRI_PLACES=1034, PETRI_TRANSITIONS=8131} [2021-11-02 22:31:23,739 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 964 predicate places. [2021-11-02 22:31:23,739 INFO L470 AbstractCegarLoop]: Abstraction has has 1034 places, 8131 transitions, 275262 flow [2021-11-02 22:31:23,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 44.72) internal successors, (1118), 25 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:23,740 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:31:23,740 INFO L254 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] [2021-11-02 22:31:23,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:23,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:23,954 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:31:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1440980487, now seen corresponding path program 30 times [2021-11-02 22:31:23,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:23,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373726734] [2021-11-02 22:31:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:23,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:24,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:24,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373726734] [2021-11-02 22:31:24,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373726734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:24,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143790433] [2021-11-02 22:31:24,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:31:24,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:24,203 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:24,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f37cae56-0a4e-4033-a949-3e33cc7b47e3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:31:25,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 22:31:25,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:31:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:31:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:25,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143790433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:25,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-11-02 22:31:25,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392402146] [2021-11-02 22:31:25,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:31:25,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:31:25,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:31:25,968 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2021-11-02 22:31:25,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1034 places, 8131 transitions, 275262 flow. Second operand has 23 states, 23 states have (on average 44.69565217391305) internal successors, (1028), 23 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:31:25,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:31:25,968 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2021-11-02 22:31:25,968 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand