./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/security.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_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/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_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/security.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/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_42f26664-167f-4549-b25f-65b674347351/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 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:41:58,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:41:58,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:41:58,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:41:59,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:41:59,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:41:59,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:41:59,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:41:59,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:41:59,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:41:59,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:41:59,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:41:59,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:41:59,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:41:59,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:41:59,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:41:59,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:41:59,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:41:59,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:41:59,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:41:59,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:41:59,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:41:59,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:41:59,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:41:59,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:41:59,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:41:59,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:41:59,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:41:59,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:41:59,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:41:59,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:41:59,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:41:59,067 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:41:59,068 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:41:59,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:41:59,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:41:59,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:41:59,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:41:59,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:41:59,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:41:59,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:41:59,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:41:59,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:41:59,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:41:59,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:41:59,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:41:59,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:41:59,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:41:59,137 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:41:59,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:41:59,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:41:59,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:41:59,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:41:59,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:41:59,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:41:59,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:41:59,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:41:59,141 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:41:59,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:41:59,142 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:41:59,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:41:59,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:41:59,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:41:59,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:41:59,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:41:59,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:41:59,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:41:59,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:41:59,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:41:59,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:41:59,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:41:59,145 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:41:59,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:41:59,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:41:59,146 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_42f26664-167f-4549-b25f-65b674347351/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-11-02 22:41:59,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:41:59,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:41:59,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:41:59,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:41:59,576 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:41:59,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/weaver/security.wvr.c [2021-11-02 22:41:59,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/data/b9738e518/564e1687db9e4ca0b6c3229e8836b99f/FLAG70a3e7ed9 [2021-11-02 22:42:00,184 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:42:00,187 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/sv-benchmarks/c/weaver/security.wvr.c [2021-11-02 22:42:00,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/data/b9738e518/564e1687db9e4ca0b6c3229e8836b99f/FLAG70a3e7ed9 [2021-11-02 22:42:00,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/data/b9738e518/564e1687db9e4ca0b6c3229e8836b99f [2021-11-02 22:42:00,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:42:00,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:42:00,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:42:00,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:42:00,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:42:00,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6663e60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00, skipping insertion in model container [2021-11-02 22:42:00,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:42:00,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:42:00,781 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_42f26664-167f-4549-b25f-65b674347351/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-11-02 22:42:00,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:42:00,797 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:42:00,845 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_42f26664-167f-4549-b25f-65b674347351/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-11-02 22:42:00,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:42:00,869 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:42:00,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00 WrapperNode [2021-11-02 22:42:00,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:42:00,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:42:00,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:42:00,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:42:00,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:42:00,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:42:00,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:42:00,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:42:00,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:42:00,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:42:00,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:42:00,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:42:00,978 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (1/1) ... [2021-11-02 22:42:00,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:42:01,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:01,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:42:01,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:42:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-02 22:42:01,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-02 22:42:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-02 22:42:01,078 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-02 22:42:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:42:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:42:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:42:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:42:01,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:42:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:42:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:42:01,081 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 22:42:01,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:42:01,490 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-02 22:42:01,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:01 BoogieIcfgContainer [2021-11-02 22:42:01,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:42:01,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:42:01,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:42:01,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:42:01,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:42:00" (1/3) ... [2021-11-02 22:42:01,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a8cd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:42:01, skipping insertion in model container [2021-11-02 22:42:01,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:00" (2/3) ... [2021-11-02 22:42:01,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a8cd16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:42:01, skipping insertion in model container [2021-11-02 22:42:01,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:01" (3/3) ... [2021-11-02 22:42:01,506 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-11-02 22:42:01,517 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 22:42:01,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:42:01,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:42:01,517 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 22:42:01,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,567 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,568 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,570 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,572 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,573 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,573 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,573 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,574 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,576 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,580 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,581 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,595 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,596 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:42:01,613 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-02 22:42:01,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:42:01,688 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 22:42:01,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:42:01,704 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 166 flow [2021-11-02 22:42:01,771 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2021-11-02 22:42:01,771 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:42:01,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-11-02 22:42:01,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 166 flow [2021-11-02 22:42:01,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 65 transitions, 142 flow [2021-11-02 22:42:01,823 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2021-11-02 22:42:01,828 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:42:01,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:01,829 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] [2021-11-02 22:42:01,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 928103298, now seen corresponding path program 1 times [2021-11-02 22:42:01,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:01,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815060660] [2021-11-02 22:42:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:01,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:02,528 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 22:42:02,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:02,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815060660] [2021-11-02 22:42:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815060660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:02,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:02,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:42:02,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651737275] [2021-11-02 22:42:02,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:42:02,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:42:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:02,564 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 75 [2021-11-02 22:42:02,570 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 142 flow. Second operand has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:02,570 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:02,570 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 75 [2021-11-02 22:42:02,572 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:02,813 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-11-02 22:42:02,813 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-02 22:42:02,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 120 events. 12/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 4 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 99. Up to 26 conditions per place. [2021-11-02 22:42:02,816 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-11-02 22:42:02,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 242 flow [2021-11-02 22:42:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 598 transitions. [2021-11-02 22:42:02,846 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7973333333333333 [2021-11-02 22:42:02,847 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 598 transitions. [2021-11-02 22:42:02,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 598 transitions. [2021-11-02 22:42:02,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:02,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 598 transitions. [2021-11-02 22:42:02,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:02,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:02,875 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:02,877 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 142 flow. Second operand 10 states and 598 transitions. [2021-11-02 22:42:02,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 242 flow [2021-11-02 22:42:02,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-02 22:42:02,889 INFO L242 Difference]: Finished difference. Result has 80 places, 64 transitions, 151 flow [2021-11-02 22:42:02,890 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2021-11-02 22:42:02,891 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 11 predicate places. [2021-11-02 22:42:02,891 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 151 flow [2021-11-02 22:42:02,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:02,892 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:02,893 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] [2021-11-02 22:42:02,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:42:02,893 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:02,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:02,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1363361579, now seen corresponding path program 1 times [2021-11-02 22:42:02,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:02,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274295712] [2021-11-02 22:42:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:02,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:03,228 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 22:42:03,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:03,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274295712] [2021-11-02 22:42:03,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274295712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:03,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:03,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:03,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251151302] [2021-11-02 22:42:03,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:03,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:03,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:03,235 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:03,235 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:03,235 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:03,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:03,550 INFO L129 PetriNetUnfolder]: 13/171 cut-off events. [2021-11-02 22:42:03,551 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-11-02 22:42:03,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 171 events. 13/171 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 644 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 275. Up to 28 conditions per place. [2021-11-02 22:42:03,555 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 27 selfloop transitions, 5 changer transitions 5/82 dead transitions. [2021-11-02 22:42:03,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 293 flow [2021-11-02 22:42:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-11-02 22:42:03,559 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-11-02 22:42:03,559 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-11-02 22:42:03,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-11-02 22:42:03,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:03,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-11-02 22:42:03,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:03,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:03,566 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:03,567 INFO L186 Difference]: Start difference. First operand has 80 places, 64 transitions, 151 flow. Second operand 9 states and 521 transitions. [2021-11-02 22:42:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 293 flow [2021-11-02 22:42:03,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 268 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-11-02 22:42:03,575 INFO L242 Difference]: Finished difference. Result has 82 places, 66 transitions, 178 flow [2021-11-02 22:42:03,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2021-11-02 22:42:03,576 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2021-11-02 22:42:03,577 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 178 flow [2021-11-02 22:42:03,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:03,578 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:03,578 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] [2021-11-02 22:42:03,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:42:03,578 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1211883793, now seen corresponding path program 2 times [2021-11-02 22:42:03,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:03,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260591814] [2021-11-02 22:42:03,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:03,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:03,960 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 22:42:03,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:03,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260591814] [2021-11-02 22:42:03,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260591814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:03,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:03,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:03,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515444239] [2021-11-02 22:42:03,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:03,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:03,971 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:03,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:03,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:03,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:03,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:04,324 INFO L129 PetriNetUnfolder]: 15/260 cut-off events. [2021-11-02 22:42:04,325 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-11-02 22:42:04,327 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 260 events. 15/260 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1451 event pairs, 10 based on Foata normal form. 3/255 useless extension candidates. Maximal degree in co-relation 455. Up to 43 conditions per place. [2021-11-02 22:42:04,329 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 30 selfloop transitions, 4 changer transitions 13/92 dead transitions. [2021-11-02 22:42:04,329 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 404 flow [2021-11-02 22:42:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:42:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-11-02 22:42:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 745 transitions. [2021-11-02 22:42:04,334 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764102564102564 [2021-11-02 22:42:04,334 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 745 transitions. [2021-11-02 22:42:04,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 745 transitions. [2021-11-02 22:42:04,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:04,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 745 transitions. [2021-11-02 22:42:04,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 57.30769230769231) internal successors, (745), 13 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:04,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:04,345 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:04,345 INFO L186 Difference]: Start difference. First operand has 82 places, 66 transitions, 178 flow. Second operand 13 states and 745 transitions. [2021-11-02 22:42:04,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 404 flow [2021-11-02 22:42:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 370 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-11-02 22:42:04,355 INFO L242 Difference]: Finished difference. Result has 97 places, 67 transitions, 214 flow [2021-11-02 22:42:04,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=97, PETRI_TRANSITIONS=67} [2021-11-02 22:42:04,356 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-11-02 22:42:04,357 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 67 transitions, 214 flow [2021-11-02 22:42:04,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:04,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:04,359 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] [2021-11-02 22:42:04,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:42:04,359 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1708637851, now seen corresponding path program 3 times [2021-11-02 22:42:04,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:04,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414274575] [2021-11-02 22:42:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:04,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:04,676 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 22:42:04,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:04,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414274575] [2021-11-02 22:42:04,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414274575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:04,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:04,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:04,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79322451] [2021-11-02 22:42:04,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:04,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:04,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:04,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 67 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:04,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:04,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:04,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:05,041 INFO L129 PetriNetUnfolder]: 14/296 cut-off events. [2021-11-02 22:42:05,041 INFO L130 PetriNetUnfolder]: For 372/374 co-relation queries the response was YES. [2021-11-02 22:42:05,043 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 296 events. 14/296 cut-off events. For 372/374 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1781 event pairs, 12 based on Foata normal form. 3/292 useless extension candidates. Maximal degree in co-relation 611. Up to 43 conditions per place. [2021-11-02 22:42:05,044 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 38 selfloop transitions, 9 changer transitions 8/100 dead transitions. [2021-11-02 22:42:05,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 540 flow [2021-11-02 22:42:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:42:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:42:05,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 808 transitions. [2021-11-02 22:42:05,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695238095238095 [2021-11-02 22:42:05,049 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 808 transitions. [2021-11-02 22:42:05,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 808 transitions. [2021-11-02 22:42:05,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:05,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 808 transitions. [2021-11-02 22:42:05,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.714285714285715) internal successors, (808), 14 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,058 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,058 INFO L186 Difference]: Start difference. First operand has 97 places, 67 transitions, 214 flow. Second operand 14 states and 808 transitions. [2021-11-02 22:42:05,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 540 flow [2021-11-02 22:42:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 438 flow, removed 50 selfloop flow, removed 10 redundant places. [2021-11-02 22:42:05,067 INFO L242 Difference]: Finished difference. Result has 103 places, 74 transitions, 296 flow [2021-11-02 22:42:05,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=296, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2021-11-02 22:42:05,068 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 34 predicate places. [2021-11-02 22:42:05,069 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 296 flow [2021-11-02 22:42:05,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:05,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:05,069 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] [2021-11-02 22:42:05,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:42:05,070 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -567228287, now seen corresponding path program 4 times [2021-11-02 22:42:05,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:05,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199932886] [2021-11-02 22:42:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:05,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:05,265 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 22:42:05,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:05,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199932886] [2021-11-02 22:42:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199932886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:05,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:05,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:05,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325245284] [2021-11-02 22:42:05,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:05,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:05,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:05,270 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:05,271 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 296 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:05,271 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:05,271 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:05,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:05,483 INFO L129 PetriNetUnfolder]: 12/279 cut-off events. [2021-11-02 22:42:05,483 INFO L130 PetriNetUnfolder]: For 408/415 co-relation queries the response was YES. [2021-11-02 22:42:05,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 279 events. 12/279 cut-off events. For 408/415 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1657 event pairs, 1 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 605. Up to 52 conditions per place. [2021-11-02 22:42:05,486 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 42 selfloop transitions, 6 changer transitions 8/101 dead transitions. [2021-11-02 22:42:05,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 589 flow [2021-11-02 22:42:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-11-02 22:42:05,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-11-02 22:42:05,490 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-11-02 22:42:05,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-11-02 22:42:05,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:05,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-11-02 22:42:05,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,496 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,496 INFO L186 Difference]: Start difference. First operand has 103 places, 74 transitions, 296 flow. Second operand 9 states and 530 transitions. [2021-11-02 22:42:05,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 589 flow [2021-11-02 22:42:05,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 525 flow, removed 32 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:05,504 INFO L242 Difference]: Finished difference. Result has 106 places, 75 transitions, 321 flow [2021-11-02 22:42:05,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2021-11-02 22:42:05,505 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 37 predicate places. [2021-11-02 22:42:05,505 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 321 flow [2021-11-02 22:42:05,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:05,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:05,506 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] [2021-11-02 22:42:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:42:05,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -623879787, now seen corresponding path program 5 times [2021-11-02 22:42:05,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:05,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617379279] [2021-11-02 22:42:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:05,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:05,674 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 22:42:05,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:05,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617379279] [2021-11-02 22:42:05,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617379279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:05,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:05,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101546958] [2021-11-02 22:42:05,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:05,679 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:05,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 321 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:05,680 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:05,680 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:05,680 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:05,890 INFO L129 PetriNetUnfolder]: 11/266 cut-off events. [2021-11-02 22:42:05,891 INFO L130 PetriNetUnfolder]: For 513/530 co-relation queries the response was YES. [2021-11-02 22:42:05,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 266 events. 11/266 cut-off events. For 513/530 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1523 event pairs, 10 based on Foata normal form. 4/263 useless extension candidates. Maximal degree in co-relation 576. Up to 43 conditions per place. [2021-11-02 22:42:05,893 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 8/92 dead transitions. [2021-11-02 22:42:05,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 92 transitions, 521 flow [2021-11-02 22:42:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2021-11-02 22:42:05,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7792592592592592 [2021-11-02 22:42:05,897 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2021-11-02 22:42:05,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2021-11-02 22:42:05,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:05,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2021-11-02 22:42:05,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,903 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:05,903 INFO L186 Difference]: Start difference. First operand has 106 places, 75 transitions, 321 flow. Second operand 9 states and 526 transitions. [2021-11-02 22:42:05,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 92 transitions, 521 flow [2021-11-02 22:42:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 479 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:05,915 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 300 flow [2021-11-02 22:42:05,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=300, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-11-02 22:42:05,915 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-11-02 22:42:05,918 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 300 flow [2021-11-02 22:42:05,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:05,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:05,918 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] [2021-11-02 22:42:05,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:42:05,919 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -95163099, now seen corresponding path program 6 times [2021-11-02 22:42:05,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:05,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330201407] [2021-11-02 22:42:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:05,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:06,128 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 22:42:06,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:06,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330201407] [2021-11-02 22:42:06,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330201407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:06,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:06,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:06,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580862497] [2021-11-02 22:42:06,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:06,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:06,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:06,139 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:06,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 300 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:06,140 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:06,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:06,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:06,339 INFO L129 PetriNetUnfolder]: 11/232 cut-off events. [2021-11-02 22:42:06,340 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2021-11-02 22:42:06,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 232 events. 11/232 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1208 event pairs, 10 based on Foata normal form. 3/229 useless extension candidates. Maximal degree in co-relation 498. Up to 43 conditions per place. [2021-11-02 22:42:06,344 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 2 changer transitions 10/85 dead transitions. [2021-11-02 22:42:06,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 459 flow [2021-11-02 22:42:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-11-02 22:42:06,347 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-11-02 22:42:06,348 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-11-02 22:42:06,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-11-02 22:42:06,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:06,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-11-02 22:42:06,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,354 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,354 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 300 flow. Second operand 9 states and 521 transitions. [2021-11-02 22:42:06,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 459 flow [2021-11-02 22:42:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 85 transitions, 415 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-11-02 22:42:06,362 INFO L242 Difference]: Finished difference. Result has 108 places, 69 transitions, 250 flow [2021-11-02 22:42:06,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=108, PETRI_TRANSITIONS=69} [2021-11-02 22:42:06,363 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-11-02 22:42:06,363 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 69 transitions, 250 flow [2021-11-02 22:42:06,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:06,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:06,364 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] [2021-11-02 22:42:06,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:42:06,365 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -607430529, now seen corresponding path program 7 times [2021-11-02 22:42:06,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:06,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630550419] [2021-11-02 22:42:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:06,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:06,630 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 22:42:06,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:06,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630550419] [2021-11-02 22:42:06,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630550419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:06,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:06,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:06,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139076754] [2021-11-02 22:42:06,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:06,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:06,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:06,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:06,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 69 transitions, 250 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:06,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:06,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:06,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:06,831 INFO L129 PetriNetUnfolder]: 11/192 cut-off events. [2021-11-02 22:42:06,831 INFO L130 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2021-11-02 22:42:06,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 192 events. 11/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 830 event pairs, 0 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 404. Up to 33 conditions per place. [2021-11-02 22:42:06,833 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 5 changer transitions 6/82 dead transitions. [2021-11-02 22:42:06,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 82 transitions, 390 flow [2021-11-02 22:42:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-11-02 22:42:06,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7688888888888888 [2021-11-02 22:42:06,837 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-11-02 22:42:06,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-11-02 22:42:06,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:06,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-11-02 22:42:06,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,847 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:06,847 INFO L186 Difference]: Start difference. First operand has 108 places, 69 transitions, 250 flow. Second operand 9 states and 519 transitions. [2021-11-02 22:42:06,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 82 transitions, 390 flow [2021-11-02 22:42:06,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 351 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-11-02 22:42:06,853 INFO L242 Difference]: Finished difference. Result has 101 places, 68 transitions, 237 flow [2021-11-02 22:42:06,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2021-11-02 22:42:06,853 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 32 predicate places. [2021-11-02 22:42:06,854 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 237 flow [2021-11-02 22:42:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:06,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:06,855 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] [2021-11-02 22:42:06,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:42:06,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1515168241, now seen corresponding path program 8 times [2021-11-02 22:42:06,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:06,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179073229] [2021-11-02 22:42:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:06,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:07,110 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 22:42:07,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:07,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179073229] [2021-11-02 22:42:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179073229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:07,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:07,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:07,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789561116] [2021-11-02 22:42:07,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:07,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:07,115 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:07,116 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:07,116 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:07,116 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:07,117 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:07,300 INFO L129 PetriNetUnfolder]: 11/175 cut-off events. [2021-11-02 22:42:07,301 INFO L130 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2021-11-02 22:42:07,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 175 events. 11/175 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 0 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 369. Up to 33 conditions per place. [2021-11-02 22:42:07,303 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-11-02 22:42:07,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 380 flow [2021-11-02 22:42:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:07,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-11-02 22:42:07,306 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-11-02 22:42:07,306 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-11-02 22:42:07,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-11-02 22:42:07,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:07,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-11-02 22:42:07,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,312 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,312 INFO L186 Difference]: Start difference. First operand has 101 places, 68 transitions, 237 flow. Second operand 9 states and 520 transitions. [2021-11-02 22:42:07,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 380 flow [2021-11-02 22:42:07,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 329 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-11-02 22:42:07,319 INFO L242 Difference]: Finished difference. Result has 97 places, 65 transitions, 189 flow [2021-11-02 22:42:07,319 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=189, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2021-11-02 22:42:07,320 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-11-02 22:42:07,320 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 189 flow [2021-11-02 22:42:07,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:07,320 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:07,321 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] [2021-11-02 22:42:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:42:07,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1185092991, now seen corresponding path program 9 times [2021-11-02 22:42:07,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:07,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801537375] [2021-11-02 22:42:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:07,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:07,506 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 22:42:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:07,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801537375] [2021-11-02 22:42:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801537375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:07,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:07,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828856095] [2021-11-02 22:42:07,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:07,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:07,510 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:07,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:07,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:07,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:07,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:07,686 INFO L129 PetriNetUnfolder]: 10/166 cut-off events. [2021-11-02 22:42:07,686 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-11-02 22:42:07,687 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 166 events. 10/166 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 623 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 325. Up to 30 conditions per place. [2021-11-02 22:42:07,688 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 21 selfloop transitions, 5 changer transitions 6/77 dead transitions. [2021-11-02 22:42:07,688 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 313 flow [2021-11-02 22:42:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 516 transitions. [2021-11-02 22:42:07,691 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644444444444445 [2021-11-02 22:42:07,691 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 516 transitions. [2021-11-02 22:42:07,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 516 transitions. [2021-11-02 22:42:07,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:07,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 516 transitions. [2021-11-02 22:42:07,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,697 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:07,697 INFO L186 Difference]: Start difference. First operand has 97 places, 65 transitions, 189 flow. Second operand 9 states and 516 transitions. [2021-11-02 22:42:07,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 313 flow [2021-11-02 22:42:07,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 280 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-11-02 22:42:07,701 INFO L242 Difference]: Finished difference. Result has 92 places, 65 transitions, 187 flow [2021-11-02 22:42:07,701 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=187, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2021-11-02 22:42:07,701 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-11-02 22:42:07,701 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 187 flow [2021-11-02 22:42:07,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:07,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:07,702 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] [2021-11-02 22:42:07,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:42:07,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash 678766821, now seen corresponding path program 10 times [2021-11-02 22:42:07,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:07,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488054871] [2021-11-02 22:42:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:07,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:07,839 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 22:42:07,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:07,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488054871] [2021-11-02 22:42:07,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488054871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:07,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:07,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:42:07,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934421847] [2021-11-02 22:42:07,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:07,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:07,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-11-02 22:42:07,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:07,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:07,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-11-02 22:42:07,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:08,019 INFO L129 PetriNetUnfolder]: 10/150 cut-off events. [2021-11-02 22:42:08,019 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-11-02 22:42:08,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 150 events. 10/150 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 296. Up to 28 conditions per place. [2021-11-02 22:42:08,021 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 19 selfloop transitions, 3 changer transitions 10/75 dead transitions. [2021-11-02 22:42:08,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 299 flow [2021-11-02 22:42:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:42:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2021-11-02 22:42:08,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-11-02 22:42:08,024 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2021-11-02 22:42:08,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2021-11-02 22:42:08,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:08,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2021-11-02 22:42:08,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,030 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,031 INFO L186 Difference]: Start difference. First operand has 92 places, 65 transitions, 187 flow. Second operand 9 states and 515 transitions. [2021-11-02 22:42:08,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 299 flow [2021-11-02 22:42:08,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 271 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-11-02 22:42:08,034 INFO L242 Difference]: Finished difference. Result has 92 places, 61 transitions, 161 flow [2021-11-02 22:42:08,035 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=161, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2021-11-02 22:42:08,035 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-11-02 22:42:08,035 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 161 flow [2021-11-02 22:42:08,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 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 22:42:08,036 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:08,036 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] [2021-11-02 22:42:08,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:42:08,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash -436103984, now seen corresponding path program 1 times [2021-11-02 22:42:08,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:08,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469120248] [2021-11-02 22:42:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:08,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:08,212 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 22:42:08,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:08,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469120248] [2021-11-02 22:42:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469120248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:08,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:08,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:08,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506527461] [2021-11-02 22:42:08,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:08,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:08,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:08,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 161 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:08,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:08,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:08,527 INFO L129 PetriNetUnfolder]: 13/165 cut-off events. [2021-11-02 22:42:08,527 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-11-02 22:42:08,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 165 events. 13/165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 627 event pairs, 0 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 324. Up to 17 conditions per place. [2021-11-02 22:42:08,529 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 30 selfloop transitions, 3 changer transitions 13/87 dead transitions. [2021-11-02 22:42:08,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 428 flow [2021-11-02 22:42:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:42:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-02 22:42:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 771 transitions. [2021-11-02 22:42:08,532 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7342857142857143 [2021-11-02 22:42:08,532 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 771 transitions. [2021-11-02 22:42:08,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 771 transitions. [2021-11-02 22:42:08,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:08,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 771 transitions. [2021-11-02 22:42:08,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,538 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,539 INFO L186 Difference]: Start difference. First operand has 92 places, 61 transitions, 161 flow. Second operand 14 states and 771 transitions. [2021-11-02 22:42:08,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 428 flow [2021-11-02 22:42:08,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 339 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-11-02 22:42:08,542 INFO L242 Difference]: Finished difference. Result has 91 places, 61 transitions, 172 flow [2021-11-02 22:42:08,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=172, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2021-11-02 22:42:08,543 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2021-11-02 22:42:08,543 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 172 flow [2021-11-02 22:42:08,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:08,543 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] [2021-11-02 22:42:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:42:08,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -693633984, now seen corresponding path program 2 times [2021-11-02 22:42:08,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:08,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666496384] [2021-11-02 22:42:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:08,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:08,698 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 22:42:08,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:08,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666496384] [2021-11-02 22:42:08,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666496384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:08,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:08,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:08,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41240504] [2021-11-02 22:42:08,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:08,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:08,702 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:08,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:08,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:08,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:08,914 INFO L129 PetriNetUnfolder]: 11/156 cut-off events. [2021-11-02 22:42:08,914 INFO L130 PetriNetUnfolder]: For 86/88 co-relation queries the response was YES. [2021-11-02 22:42:08,915 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 156 events. 11/156 cut-off events. For 86/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 537 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 314. Up to 20 conditions per place. [2021-11-02 22:42:08,915 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 22 selfloop transitions, 5 changer transitions 7/75 dead transitions. [2021-11-02 22:42:08,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 302 flow [2021-11-02 22:42:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-11-02 22:42:08,918 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-11-02 22:42:08,918 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-11-02 22:42:08,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-11-02 22:42:08,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:08,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-11-02 22:42:08,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,922 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,922 INFO L186 Difference]: Start difference. First operand has 91 places, 61 transitions, 172 flow. Second operand 10 states and 554 transitions. [2021-11-02 22:42:08,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 302 flow [2021-11-02 22:42:08,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 249 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-11-02 22:42:08,926 INFO L242 Difference]: Finished difference. Result has 85 places, 61 transitions, 169 flow [2021-11-02 22:42:08,926 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=169, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2021-11-02 22:42:08,926 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2021-11-02 22:42:08,926 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 169 flow [2021-11-02 22:42:08,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:08,927 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:08,927 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] [2021-11-02 22:42:08,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:42:08,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:08,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1829380162, now seen corresponding path program 3 times [2021-11-02 22:42:08,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:08,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843972789] [2021-11-02 22:42:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:08,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:09,077 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 22:42:09,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:09,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843972789] [2021-11-02 22:42:09,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843972789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:09,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:09,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:09,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506261454] [2021-11-02 22:42:09,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:09,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:09,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:09,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:09,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 169 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:09,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:09,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:09,310 INFO L129 PetriNetUnfolder]: 12/198 cut-off events. [2021-11-02 22:42:09,311 INFO L130 PetriNetUnfolder]: For 120/122 co-relation queries the response was YES. [2021-11-02 22:42:09,312 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 198 events. 12/198 cut-off events. For 120/122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 851 event pairs, 0 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 393. Up to 27 conditions per place. [2021-11-02 22:42:09,313 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 4 changer transitions 7/87 dead transitions. [2021-11-02 22:42:09,313 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 433 flow [2021-11-02 22:42:09,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 562 transitions. [2021-11-02 22:42:09,340 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7493333333333333 [2021-11-02 22:42:09,340 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 562 transitions. [2021-11-02 22:42:09,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 562 transitions. [2021-11-02 22:42:09,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:09,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 562 transitions. [2021-11-02 22:42:09,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,345 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,346 INFO L186 Difference]: Start difference. First operand has 85 places, 61 transitions, 169 flow. Second operand 10 states and 562 transitions. [2021-11-02 22:42:09,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 433 flow [2021-11-02 22:42:09,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 376 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-11-02 22:42:09,349 INFO L242 Difference]: Finished difference. Result has 88 places, 63 transitions, 186 flow [2021-11-02 22:42:09,349 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2021-11-02 22:42:09,350 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2021-11-02 22:42:09,350 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 186 flow [2021-11-02 22:42:09,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,351 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:09,351 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] [2021-11-02 22:42:09,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:42:09,351 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1575729550, now seen corresponding path program 4 times [2021-11-02 22:42:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:09,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23031710] [2021-11-02 22:42:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:09,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:09,510 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 22:42:09,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:09,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23031710] [2021-11-02 22:42:09,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23031710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:09,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:09,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:09,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711302712] [2021-11-02 22:42:09,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:09,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:09,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:09,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:09,514 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:09,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:09,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:09,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:09,758 INFO L129 PetriNetUnfolder]: 12/259 cut-off events. [2021-11-02 22:42:09,758 INFO L130 PetriNetUnfolder]: For 170/178 co-relation queries the response was YES. [2021-11-02 22:42:09,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 259 events. 12/259 cut-off events. For 170/178 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1388 event pairs, 3 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 525. Up to 49 conditions per place. [2021-11-02 22:42:09,761 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 29 selfloop transitions, 7 changer transitions 7/84 dead transitions. [2021-11-02 22:42:09,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 383 flow [2021-11-02 22:42:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2021-11-02 22:42:09,763 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453333333333333 [2021-11-02 22:42:09,763 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 559 transitions. [2021-11-02 22:42:09,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 559 transitions. [2021-11-02 22:42:09,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:09,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 559 transitions. [2021-11-02 22:42:09,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.9) internal successors, (559), 10 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 22:42:09,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,773 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,773 INFO L186 Difference]: Start difference. First operand has 88 places, 63 transitions, 186 flow. Second operand 10 states and 559 transitions. [2021-11-02 22:42:09,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 383 flow [2021-11-02 22:42:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 352 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:09,778 INFO L242 Difference]: Finished difference. Result has 94 places, 66 transitions, 232 flow [2021-11-02 22:42:09,778 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=66} [2021-11-02 22:42:09,779 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2021-11-02 22:42:09,779 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 66 transitions, 232 flow [2021-11-02 22:42:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:09,780 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] [2021-11-02 22:42:09,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:42:09,781 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2058148696, now seen corresponding path program 5 times [2021-11-02 22:42:09,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:09,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031867483] [2021-11-02 22:42:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:09,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:09,952 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 22:42:09,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:09,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031867483] [2021-11-02 22:42:09,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031867483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:09,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:09,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:09,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848569074] [2021-11-02 22:42:09,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:09,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:09,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:09,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:09,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 66 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:09,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:09,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:10,290 INFO L129 PetriNetUnfolder]: 9/283 cut-off events. [2021-11-02 22:42:10,291 INFO L130 PetriNetUnfolder]: For 306/316 co-relation queries the response was YES. [2021-11-02 22:42:10,292 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 283 events. 9/283 cut-off events. For 306/316 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1615 event pairs, 2 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 614. Up to 44 conditions per place. [2021-11-02 22:42:10,293 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 36 selfloop transitions, 10 changer transitions 13/100 dead transitions. [2021-11-02 22:42:10,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 588 flow [2021-11-02 22:42:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:42:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-02 22:42:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 832 transitions. [2021-11-02 22:42:10,297 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7395555555555555 [2021-11-02 22:42:10,297 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 832 transitions. [2021-11-02 22:42:10,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 832 transitions. [2021-11-02 22:42:10,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:10,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 832 transitions. [2021-11-02 22:42:10,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.46666666666667) internal successors, (832), 15 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,306 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,307 INFO L186 Difference]: Start difference. First operand has 94 places, 66 transitions, 232 flow. Second operand 15 states and 832 transitions. [2021-11-02 22:42:10,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 588 flow [2021-11-02 22:42:10,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 542 flow, removed 16 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:10,313 INFO L242 Difference]: Finished difference. Result has 110 places, 72 transitions, 338 flow [2021-11-02 22:42:10,313 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=338, PETRI_PLACES=110, PETRI_TRANSITIONS=72} [2021-11-02 22:42:10,313 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-11-02 22:42:10,314 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 72 transitions, 338 flow [2021-11-02 22:42:10,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:10,315 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] [2021-11-02 22:42:10,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:42:10,315 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1161562930, now seen corresponding path program 6 times [2021-11-02 22:42:10,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:10,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197532003] [2021-11-02 22:42:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:10,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:10,515 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 22:42:10,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197532003] [2021-11-02 22:42:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197532003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:10,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:10,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:10,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295769129] [2021-11-02 22:42:10,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:10,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:10,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:10,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:10,523 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:10,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 72 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:10,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:10,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:10,869 INFO L129 PetriNetUnfolder]: 11/354 cut-off events. [2021-11-02 22:42:10,869 INFO L130 PetriNetUnfolder]: For 692/706 co-relation queries the response was YES. [2021-11-02 22:42:10,870 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 354 events. 11/354 cut-off events. For 692/706 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2330 event pairs, 6 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 908. Up to 42 conditions per place. [2021-11-02 22:42:10,871 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 38 selfloop transitions, 18 changer transitions 13/110 dead transitions. [2021-11-02 22:42:10,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 787 flow [2021-11-02 22:42:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:42:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 22:42:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 887 transitions. [2021-11-02 22:42:10,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7391666666666666 [2021-11-02 22:42:10,877 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 887 transitions. [2021-11-02 22:42:10,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 887 transitions. [2021-11-02 22:42:10,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:10,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 887 transitions. [2021-11-02 22:42:10,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.4375) internal successors, (887), 16 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,884 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,884 INFO L186 Difference]: Start difference. First operand has 110 places, 72 transitions, 338 flow. Second operand 16 states and 887 transitions. [2021-11-02 22:42:10,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 787 flow [2021-11-02 22:42:10,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 710 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-11-02 22:42:10,892 INFO L242 Difference]: Finished difference. Result has 123 places, 80 transitions, 502 flow [2021-11-02 22:42:10,893 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=502, PETRI_PLACES=123, PETRI_TRANSITIONS=80} [2021-11-02 22:42:10,893 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 54 predicate places. [2021-11-02 22:42:10,893 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 80 transitions, 502 flow [2021-11-02 22:42:10,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:10,894 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:10,894 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] [2021-11-02 22:42:10,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:42:10,895 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:10,895 INFO L85 PathProgramCache]: Analyzing trace with hash -265714934, now seen corresponding path program 7 times [2021-11-02 22:42:10,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:10,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75323607] [2021-11-02 22:42:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:10,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:11,041 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 22:42:11,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:11,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75323607] [2021-11-02 22:42:11,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75323607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:11,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:11,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:11,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123703908] [2021-11-02 22:42:11,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:11,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:11,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:11,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:11,045 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:11,046 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 80 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,046 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:11,046 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:11,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:11,258 INFO L129 PetriNetUnfolder]: 10/343 cut-off events. [2021-11-02 22:42:11,258 INFO L130 PetriNetUnfolder]: For 1123/1143 co-relation queries the response was YES. [2021-11-02 22:42:11,260 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 343 events. 10/343 cut-off events. For 1123/1143 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2240 event pairs, 4 based on Foata normal form. 3/343 useless extension candidates. Maximal degree in co-relation 955. Up to 57 conditions per place. [2021-11-02 22:42:11,261 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 47 selfloop transitions, 7 changer transitions 11/106 dead transitions. [2021-11-02 22:42:11,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 106 transitions, 904 flow [2021-11-02 22:42:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-11-02 22:42:11,264 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-11-02 22:42:11,264 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-11-02 22:42:11,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-11-02 22:42:11,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:11,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-11-02 22:42:11,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,269 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,269 INFO L186 Difference]: Start difference. First operand has 123 places, 80 transitions, 502 flow. Second operand 10 states and 561 transitions. [2021-11-02 22:42:11,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 106 transitions, 904 flow [2021-11-02 22:42:11,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 842 flow, removed 31 selfloop flow, removed 8 redundant places. [2021-11-02 22:42:11,279 INFO L242 Difference]: Finished difference. Result has 124 places, 83 transitions, 545 flow [2021-11-02 22:42:11,279 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2021-11-02 22:42:11,280 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2021-11-02 22:42:11,280 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 545 flow [2021-11-02 22:42:11,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,280 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:11,281 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] [2021-11-02 22:42:11,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:42:11,281 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -391569458, now seen corresponding path program 8 times [2021-11-02 22:42:11,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:11,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370232947] [2021-11-02 22:42:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:11,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:11,424 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 22:42:11,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:11,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370232947] [2021-11-02 22:42:11,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370232947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:11,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:11,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:11,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268340205] [2021-11-02 22:42:11,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:11,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:11,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:11,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:11,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:11,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:11,743 INFO L129 PetriNetUnfolder]: 10/317 cut-off events. [2021-11-02 22:42:11,744 INFO L130 PetriNetUnfolder]: For 1160/1192 co-relation queries the response was YES. [2021-11-02 22:42:11,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 317 events. 10/317 cut-off events. For 1160/1192 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 5 based on Foata normal form. 12/326 useless extension candidates. Maximal degree in co-relation 909. Up to 64 conditions per place. [2021-11-02 22:42:11,772 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 31 selfloop transitions, 5 changer transitions 29/106 dead transitions. [2021-11-02 22:42:11,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 106 transitions, 926 flow [2021-11-02 22:42:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:42:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-11-02 22:42:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2021-11-02 22:42:11,774 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7324444444444445 [2021-11-02 22:42:11,775 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2021-11-02 22:42:11,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2021-11-02 22:42:11,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:11,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2021-11-02 22:42:11,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,781 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,781 INFO L186 Difference]: Start difference. First operand has 124 places, 83 transitions, 545 flow. Second operand 15 states and 824 transitions. [2021-11-02 22:42:11,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 106 transitions, 926 flow [2021-11-02 22:42:11,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 106 transitions, 891 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-11-02 22:42:11,791 INFO L242 Difference]: Finished difference. Result has 136 places, 73 transitions, 396 flow [2021-11-02 22:42:11,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=396, PETRI_PLACES=136, PETRI_TRANSITIONS=73} [2021-11-02 22:42:11,793 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2021-11-02 22:42:11,793 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 73 transitions, 396 flow [2021-11-02 22:42:11,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,794 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:11,794 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] [2021-11-02 22:42:11,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:42:11,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:11,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash -657014896, now seen corresponding path program 9 times [2021-11-02 22:42:11,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:11,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285749862] [2021-11-02 22:42:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:11,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:11,952 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 22:42:11,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:11,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285749862] [2021-11-02 22:42:11,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285749862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:11,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:11,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:11,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734465759] [2021-11-02 22:42:11,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:11,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:11,955 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:11,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 73 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:11,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:11,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:11,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:12,241 INFO L129 PetriNetUnfolder]: 7/278 cut-off events. [2021-11-02 22:42:12,242 INFO L130 PetriNetUnfolder]: For 993/1015 co-relation queries the response was YES. [2021-11-02 22:42:12,243 INFO L84 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 278 events. 7/278 cut-off events. For 993/1015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1601 event pairs, 5 based on Foata normal form. 7/283 useless extension candidates. Maximal degree in co-relation 813. Up to 41 conditions per place. [2021-11-02 22:42:12,244 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 40 selfloop transitions, 11 changer transitions 14/106 dead transitions. [2021-11-02 22:42:12,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 106 transitions, 816 flow [2021-11-02 22:42:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:42:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 22:42:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 890 transitions. [2021-11-02 22:42:12,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-11-02 22:42:12,247 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 890 transitions. [2021-11-02 22:42:12,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 890 transitions. [2021-11-02 22:42:12,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:12,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 890 transitions. [2021-11-02 22:42:12,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,254 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,254 INFO L186 Difference]: Start difference. First operand has 136 places, 73 transitions, 396 flow. Second operand 16 states and 890 transitions. [2021-11-02 22:42:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 106 transitions, 816 flow [2021-11-02 22:42:12,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 106 transitions, 667 flow, removed 69 selfloop flow, removed 15 redundant places. [2021-11-02 22:42:12,263 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 445 flow [2021-11-02 22:42:12,263 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-11-02 22:42:12,263 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-11-02 22:42:12,264 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 445 flow [2021-11-02 22:42:12,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,265 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:12,265 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] [2021-11-02 22:42:12,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:42:12,266 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash -760491658, now seen corresponding path program 10 times [2021-11-02 22:42:12,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:12,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186471278] [2021-11-02 22:42:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:12,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:12,421 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 22:42:12,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:12,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186471278] [2021-11-02 22:42:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186471278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:12,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:12,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:12,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241073027] [2021-11-02 22:42:12,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:12,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:12,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:12,426 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 445 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,426 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:12,426 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:12,426 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:12,658 INFO L129 PetriNetUnfolder]: 6/270 cut-off events. [2021-11-02 22:42:12,659 INFO L130 PetriNetUnfolder]: For 802/823 co-relation queries the response was YES. [2021-11-02 22:42:12,660 INFO L84 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 270 events. 6/270 cut-off events. For 802/823 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1531 event pairs, 5 based on Foata normal form. 5/273 useless extension candidates. Maximal degree in co-relation 758. Up to 51 conditions per place. [2021-11-02 22:42:12,661 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2021-11-02 22:42:12,662 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 94 transitions, 709 flow [2021-11-02 22:42:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:12,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-11-02 22:42:12,664 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-11-02 22:42:12,664 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-11-02 22:42:12,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-11-02 22:42:12,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:12,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-11-02 22:42:12,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,668 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,669 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 445 flow. Second operand 10 states and 561 transitions. [2021-11-02 22:42:12,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 94 transitions, 709 flow [2021-11-02 22:42:12,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 654 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-11-02 22:42:12,678 INFO L242 Difference]: Finished difference. Result has 129 places, 77 transitions, 440 flow [2021-11-02 22:42:12,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=129, PETRI_TRANSITIONS=77} [2021-11-02 22:42:12,678 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 60 predicate places. [2021-11-02 22:42:12,679 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 77 transitions, 440 flow [2021-11-02 22:42:12,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:12,679 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] [2021-11-02 22:42:12,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:42:12,680 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -617420912, now seen corresponding path program 11 times [2021-11-02 22:42:12,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:12,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802319283] [2021-11-02 22:42:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:12,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:12,844 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 22:42:12,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:12,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802319283] [2021-11-02 22:42:12,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802319283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:12,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:12,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:12,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18717583] [2021-11-02 22:42:12,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:12,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:12,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:12,848 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 77 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,848 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:12,849 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:12,849 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:13,069 INFO L129 PetriNetUnfolder]: 5/261 cut-off events. [2021-11-02 22:42:13,069 INFO L130 PetriNetUnfolder]: For 698/711 co-relation queries the response was YES. [2021-11-02 22:42:13,071 INFO L84 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 261 events. 5/261 cut-off events. For 698/711 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1432 event pairs, 5 based on Foata normal form. 5/264 useless extension candidates. Maximal degree in co-relation 705. Up to 49 conditions per place. [2021-11-02 22:42:13,072 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 8 changer transitions 8/96 dead transitions. [2021-11-02 22:42:13,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 96 transitions, 689 flow [2021-11-02 22:42:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2021-11-02 22:42:13,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2021-11-02 22:42:13,075 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2021-11-02 22:42:13,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2021-11-02 22:42:13,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:13,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2021-11-02 22:42:13,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,080 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,080 INFO L186 Difference]: Start difference. First operand has 129 places, 77 transitions, 440 flow. Second operand 10 states and 565 transitions. [2021-11-02 22:42:13,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 96 transitions, 689 flow [2021-11-02 22:42:13,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 96 transitions, 612 flow, removed 24 selfloop flow, removed 10 redundant places. [2021-11-02 22:42:13,088 INFO L242 Difference]: Finished difference. Result has 130 places, 79 transitions, 450 flow [2021-11-02 22:42:13,089 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=130, PETRI_TRANSITIONS=79} [2021-11-02 22:42:13,089 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-11-02 22:42:13,089 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 79 transitions, 450 flow [2021-11-02 22:42:13,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:13,090 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] [2021-11-02 22:42:13,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:42:13,090 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425732, now seen corresponding path program 12 times [2021-11-02 22:42:13,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:13,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836677880] [2021-11-02 22:42:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:13,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:13,264 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 22:42:13,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:13,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836677880] [2021-11-02 22:42:13,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836677880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:13,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:13,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:13,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906733939] [2021-11-02 22:42:13,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:13,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:13,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:13,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:13,269 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:13,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 79 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:13,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:13,270 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:13,493 INFO L129 PetriNetUnfolder]: 5/248 cut-off events. [2021-11-02 22:42:13,494 INFO L130 PetriNetUnfolder]: For 542/555 co-relation queries the response was YES. [2021-11-02 22:42:13,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 248 events. 5/248 cut-off events. For 542/555 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1320 event pairs, 5 based on Foata normal form. 5/251 useless extension candidates. Maximal degree in co-relation 658. Up to 49 conditions per place. [2021-11-02 22:42:13,496 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 12/92 dead transitions. [2021-11-02 22:42:13,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 92 transitions, 653 flow [2021-11-02 22:42:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-11-02 22:42:13,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-11-02 22:42:13,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-11-02 22:42:13,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-11-02 22:42:13,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:13,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-11-02 22:42:13,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,505 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,505 INFO L186 Difference]: Start difference. First operand has 130 places, 79 transitions, 450 flow. Second operand 10 states and 561 transitions. [2021-11-02 22:42:13,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 92 transitions, 653 flow [2021-11-02 22:42:13,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 92 transitions, 617 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:13,513 INFO L242 Difference]: Finished difference. Result has 133 places, 75 transitions, 391 flow [2021-11-02 22:42:13,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=133, PETRI_TRANSITIONS=75} [2021-11-02 22:42:13,514 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-11-02 22:42:13,514 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 75 transitions, 391 flow [2021-11-02 22:42:13,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:13,515 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] [2021-11-02 22:42:13,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:42:13,515 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 159473990, now seen corresponding path program 13 times [2021-11-02 22:42:13,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:13,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989656971] [2021-11-02 22:42:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:13,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:13,687 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 22:42:13,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:13,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989656971] [2021-11-02 22:42:13,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989656971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:13,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:13,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:13,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560615867] [2021-11-02 22:42:13,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:13,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:13,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:13,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 75 transitions, 391 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:13,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:13,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:13,692 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:14,021 INFO L129 PetriNetUnfolder]: 5/217 cut-off events. [2021-11-02 22:42:14,022 INFO L130 PetriNetUnfolder]: For 469/482 co-relation queries the response was YES. [2021-11-02 22:42:14,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 217 events. 5/217 cut-off events. For 469/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1040 event pairs, 5 based on Foata normal form. 7/222 useless extension candidates. Maximal degree in co-relation 573. Up to 39 conditions per place. [2021-11-02 22:42:14,024 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 21 selfloop transitions, 2 changer transitions 24/88 dead transitions. [2021-11-02 22:42:14,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 88 transitions, 588 flow [2021-11-02 22:42:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:42:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-11-02 22:42:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 875 transitions. [2021-11-02 22:42:14,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-11-02 22:42:14,030 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 875 transitions. [2021-11-02 22:42:14,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 875 transitions. [2021-11-02 22:42:14,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:14,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 875 transitions. [2021-11-02 22:42:14,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.6875) internal successors, (875), 16 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,037 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,037 INFO L186 Difference]: Start difference. First operand has 133 places, 75 transitions, 391 flow. Second operand 16 states and 875 transitions. [2021-11-02 22:42:14,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 88 transitions, 588 flow [2021-11-02 22:42:14,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 532 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-11-02 22:42:14,044 INFO L242 Difference]: Finished difference. Result has 133 places, 63 transitions, 231 flow [2021-11-02 22:42:14,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=231, PETRI_PLACES=133, PETRI_TRANSITIONS=63} [2021-11-02 22:42:14,045 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-11-02 22:42:14,045 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 63 transitions, 231 flow [2021-11-02 22:42:14,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:14,046 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] [2021-11-02 22:42:14,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:42:14,046 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1717179428, now seen corresponding path program 14 times [2021-11-02 22:42:14,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:14,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065824259] [2021-11-02 22:42:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:14,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:14,193 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 22:42:14,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:14,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065824259] [2021-11-02 22:42:14,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065824259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:14,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:14,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:14,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997716016] [2021-11-02 22:42:14,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:14,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:14,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:14,197 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:14,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 63 transitions, 231 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:14,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:14,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:14,384 INFO L129 PetriNetUnfolder]: 4/165 cut-off events. [2021-11-02 22:42:14,384 INFO L130 PetriNetUnfolder]: For 277/283 co-relation queries the response was YES. [2021-11-02 22:42:14,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 165 events. 4/165 cut-off events. For 277/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 616 event pairs, 2 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 413. Up to 30 conditions per place. [2021-11-02 22:42:14,386 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 25 selfloop transitions, 6 changer transitions 7/79 dead transitions. [2021-11-02 22:42:14,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 79 transitions, 435 flow [2021-11-02 22:42:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-11-02 22:42:14,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-11-02 22:42:14,389 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-11-02 22:42:14,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-11-02 22:42:14,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:14,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-11-02 22:42:14,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,394 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,394 INFO L186 Difference]: Start difference. First operand has 133 places, 63 transitions, 231 flow. Second operand 10 states and 554 transitions. [2021-11-02 22:42:14,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 79 transitions, 435 flow [2021-11-02 22:42:14,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 79 transitions, 363 flow, removed 29 selfloop flow, removed 17 redundant places. [2021-11-02 22:42:14,399 INFO L242 Difference]: Finished difference. Result has 104 places, 65 transitions, 235 flow [2021-11-02 22:42:14,399 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2021-11-02 22:42:14,399 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 35 predicate places. [2021-11-02 22:42:14,400 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 235 flow [2021-11-02 22:42:14,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,400 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:14,400 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] [2021-11-02 22:42:14,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:42:14,401 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1692819958, now seen corresponding path program 15 times [2021-11-02 22:42:14,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:14,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364708960] [2021-11-02 22:42:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:14,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:14,570 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 22:42:14,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:14,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364708960] [2021-11-02 22:42:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364708960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:14,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:14,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:14,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972155554] [2021-11-02 22:42:14,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:14,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:14,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:14,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:14,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:14,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:14,578 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:14,776 INFO L129 PetriNetUnfolder]: 3/167 cut-off events. [2021-11-02 22:42:14,776 INFO L130 PetriNetUnfolder]: For 177/183 co-relation queries the response was YES. [2021-11-02 22:42:14,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 167 events. 3/167 cut-off events. For 177/183 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 648 event pairs, 2 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-11-02 22:42:14,779 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 26 selfloop transitions, 6 changer transitions 7/80 dead transitions. [2021-11-02 22:42:14,780 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 80 transitions, 406 flow [2021-11-02 22:42:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 555 transitions. [2021-11-02 22:42:14,782 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.74 [2021-11-02 22:42:14,782 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 555 transitions. [2021-11-02 22:42:14,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 555 transitions. [2021-11-02 22:42:14,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:14,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 555 transitions. [2021-11-02 22:42:14,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.5) internal successors, (555), 10 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,787 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,787 INFO L186 Difference]: Start difference. First operand has 104 places, 65 transitions, 235 flow. Second operand 10 states and 555 transitions. [2021-11-02 22:42:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 80 transitions, 406 flow [2021-11-02 22:42:14,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 80 transitions, 381 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:14,792 INFO L242 Difference]: Finished difference. Result has 110 places, 66 transitions, 261 flow [2021-11-02 22:42:14,793 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=261, PETRI_PLACES=110, PETRI_TRANSITIONS=66} [2021-11-02 22:42:14,793 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-11-02 22:42:14,793 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 66 transitions, 261 flow [2021-11-02 22:42:14,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,794 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:14,794 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] [2021-11-02 22:42:14,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-02 22:42:14,794 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1241301456, now seen corresponding path program 16 times [2021-11-02 22:42:14,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:14,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801126898] [2021-11-02 22:42:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:14,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:14,951 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 22:42:14,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:14,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801126898] [2021-11-02 22:42:14,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801126898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:14,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:14,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:14,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201703666] [2021-11-02 22:42:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:14,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:14,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:14,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 66 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:14,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:14,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:14,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:15,136 INFO L129 PetriNetUnfolder]: 2/162 cut-off events. [2021-11-02 22:42:15,136 INFO L130 PetriNetUnfolder]: For 228/236 co-relation queries the response was YES. [2021-11-02 22:42:15,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 162 events. 2/162 cut-off events. For 228/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 611 event pairs, 2 based on Foata normal form. 4/165 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-11-02 22:42:15,138 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 29 selfloop transitions, 7 changer transitions 4/81 dead transitions. [2021-11-02 22:42:15,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 81 transitions, 426 flow [2021-11-02 22:42:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 558 transitions. [2021-11-02 22:42:15,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.744 [2021-11-02 22:42:15,144 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 558 transitions. [2021-11-02 22:42:15,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 558 transitions. [2021-11-02 22:42:15,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:15,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 558 transitions. [2021-11-02 22:42:15,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.8) internal successors, (558), 10 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,148 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,148 INFO L186 Difference]: Start difference. First operand has 110 places, 66 transitions, 261 flow. Second operand 10 states and 558 transitions. [2021-11-02 22:42:15,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 81 transitions, 426 flow [2021-11-02 22:42:15,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 81 transitions, 363 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-11-02 22:42:15,153 INFO L242 Difference]: Finished difference. Result has 112 places, 68 transitions, 277 flow [2021-11-02 22:42:15,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=112, PETRI_TRANSITIONS=68} [2021-11-02 22:42:15,154 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 43 predicate places. [2021-11-02 22:42:15,154 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 68 transitions, 277 flow [2021-11-02 22:42:15,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,154 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:15,155 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] [2021-11-02 22:42:15,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-02 22:42:15,155 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:15,156 INFO L85 PathProgramCache]: Analyzing trace with hash 544611928, now seen corresponding path program 17 times [2021-11-02 22:42:15,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:15,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042428993] [2021-11-02 22:42:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:15,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:15,314 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 22:42:15,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:15,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042428993] [2021-11-02 22:42:15,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042428993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:15,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588877394] [2021-11-02 22:42:15,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:15,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:15,320 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:15,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 68 transitions, 277 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:15,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:15,322 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:15,495 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2021-11-02 22:42:15,495 INFO L130 PetriNetUnfolder]: For 166/174 co-relation queries the response was YES. [2021-11-02 22:42:15,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 152 events. 2/152 cut-off events. For 166/174 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 534 event pairs, 2 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 365. Up to 25 conditions per place. [2021-11-02 22:42:15,497 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 4 changer transitions 8/77 dead transitions. [2021-11-02 22:42:15,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 77 transitions, 394 flow [2021-11-02 22:42:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-11-02 22:42:15,499 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-11-02 22:42:15,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-11-02 22:42:15,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-11-02 22:42:15,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:15,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-11-02 22:42:15,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,504 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,504 INFO L186 Difference]: Start difference. First operand has 112 places, 68 transitions, 277 flow. Second operand 10 states and 554 transitions. [2021-11-02 22:42:15,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 77 transitions, 394 flow [2021-11-02 22:42:15,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 77 transitions, 364 flow, removed 11 selfloop flow, removed 6 redundant places. [2021-11-02 22:42:15,509 INFO L242 Difference]: Finished difference. Result has 116 places, 65 transitions, 240 flow [2021-11-02 22:42:15,509 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=65} [2021-11-02 22:42:15,510 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 47 predicate places. [2021-11-02 22:42:15,510 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 65 transitions, 240 flow [2021-11-02 22:42:15,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,510 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:15,511 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, 1, 1] [2021-11-02 22:42:15,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 22:42:15,511 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1503460560, now seen corresponding path program 18 times [2021-11-02 22:42:15,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:15,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616504100] [2021-11-02 22:42:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:15,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:15,676 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 22:42:15,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:15,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616504100] [2021-11-02 22:42:15,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616504100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:15,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:15,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:15,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015852824] [2021-11-02 22:42:15,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:15,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:15,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:15,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 65 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:15,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:15,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:15,863 INFO L129 PetriNetUnfolder]: 2/125 cut-off events. [2021-11-02 22:42:15,863 INFO L130 PetriNetUnfolder]: For 123/129 co-relation queries the response was YES. [2021-11-02 22:42:15,866 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 125 events. 2/125 cut-off events. For 123/129 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 2 based on Foata normal form. 3/127 useless extension candidates. Maximal degree in co-relation 293. Up to 20 conditions per place. [2021-11-02 22:42:15,867 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 17 selfloop transitions, 3 changer transitions 10/71 dead transitions. [2021-11-02 22:42:15,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 71 transitions, 336 flow [2021-11-02 22:42:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 548 transitions. [2021-11-02 22:42:15,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2021-11-02 22:42:15,870 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 548 transitions. [2021-11-02 22:42:15,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 548 transitions. [2021-11-02 22:42:15,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:15,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 548 transitions. [2021-11-02 22:42:15,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.8) internal successors, (548), 10 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,875 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,875 INFO L186 Difference]: Start difference. First operand has 116 places, 65 transitions, 240 flow. Second operand 10 states and 548 transitions. [2021-11-02 22:42:15,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 71 transitions, 336 flow [2021-11-02 22:42:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 300 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-11-02 22:42:15,879 INFO L242 Difference]: Finished difference. Result has 108 places, 61 transitions, 182 flow [2021-11-02 22:42:15,880 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=108, PETRI_TRANSITIONS=61} [2021-11-02 22:42:15,883 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-11-02 22:42:15,883 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 61 transitions, 182 flow [2021-11-02 22:42:15,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:15,883 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:15,884 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] [2021-11-02 22:42:15,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-02 22:42:15,884 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash -616209836, now seen corresponding path program 19 times [2021-11-02 22:42:15,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:15,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261050166] [2021-11-02 22:42:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:15,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:16,053 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 22:42:16,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:16,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261050166] [2021-11-02 22:42:16,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261050166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:16,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:16,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:16,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186298541] [2021-11-02 22:42:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:16,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:16,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 61 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:16,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:16,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:16,241 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2021-11-02 22:42:16,242 INFO L130 PetriNetUnfolder]: For 47/49 co-relation queries the response was YES. [2021-11-02 22:42:16,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 114 events. 0/114 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-11-02 22:42:16,242 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 14 selfloop transitions, 6 changer transitions 7/68 dead transitions. [2021-11-02 22:42:16,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 68 transitions, 280 flow [2021-11-02 22:42:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:16,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2021-11-02 22:42:16,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2021-11-02 22:42:16,245 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 545 transitions. [2021-11-02 22:42:16,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 545 transitions. [2021-11-02 22:42:16,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:16,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 545 transitions. [2021-11-02 22:42:16,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.5) internal successors, (545), 10 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,249 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,250 INFO L186 Difference]: Start difference. First operand has 108 places, 61 transitions, 182 flow. Second operand 10 states and 545 transitions. [2021-11-02 22:42:16,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 68 transitions, 280 flow [2021-11-02 22:42:16,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 249 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-11-02 22:42:16,253 INFO L242 Difference]: Finished difference. Result has 98 places, 61 transitions, 178 flow [2021-11-02 22:42:16,253 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2021-11-02 22:42:16,254 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2021-11-02 22:42:16,254 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 178 flow [2021-11-02 22:42:16,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:42:16,255 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] [2021-11-02 22:42:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-02 22:42:16,255 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:42:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 367647626, now seen corresponding path program 20 times [2021-11-02 22:42:16,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:16,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492489316] [2021-11-02 22:42:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:16,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:16,402 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 22:42:16,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:16,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492489316] [2021-11-02 22:42:16,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492489316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:16,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:16,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:42:16,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344237134] [2021-11-02 22:42:16,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:16,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:16,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-11-02 22:42:16,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:42:16,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-11-02 22:42:16,407 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:42:16,568 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-11-02 22:42:16,568 INFO L130 PetriNetUnfolder]: For 27/29 co-relation queries the response was YES. [2021-11-02 22:42:16,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 94 events. 0/94 cut-off events. For 27/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-11-02 22:42:16,568 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2021-11-02 22:42:16,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 62 transitions, 244 flow [2021-11-02 22:42:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-02 22:42:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 541 transitions. [2021-11-02 22:42:16,570 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7213333333333334 [2021-11-02 22:42:16,570 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 541 transitions. [2021-11-02 22:42:16,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 541 transitions. [2021-11-02 22:42:16,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:42:16,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 541 transitions. [2021-11-02 22:42:16,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.1) internal successors, (541), 10 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,574 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,575 INFO L186 Difference]: Start difference. First operand has 98 places, 61 transitions, 178 flow. Second operand 10 states and 541 transitions. [2021-11-02 22:42:16,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 62 transitions, 244 flow [2021-11-02 22:42:16,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 62 transitions, 228 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-11-02 22:42:16,577 INFO L242 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2021-11-02 22:42:16,577 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2021-11-02 22:42:16,577 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2021-11-02 22:42:16,577 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2021-11-02 22:42:16,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:16,580 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:42:16,581 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-02 22:42:16,581 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-02 22:42:16,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-02 22:42:16,586 INFO L731 BasicCegarLoop]: Path program histogram: [20, 10, 1] [2021-11-02 22:42:16,588 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-02 22:42:16,589 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:42:16,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:42:16 BasicIcfg [2021-11-02 22:42:16,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:42:16,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:42:16,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:42:16,595 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:42:16,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:01" (3/4) ... [2021-11-02 22:42:16,599 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-02 22:42:16,607 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-11-02 22:42:16,607 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-11-02 22:42:16,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-02 22:42:16,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-02 22:42:16,614 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:42:16,615 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:42:16,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 22:42:16,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:42:16,671 INFO L168 Benchmark]: Toolchain (without parser) took 16146.43 ms. Allocated memory was 96.5 MB in the beginning and 180.4 MB in the end (delta: 83.9 MB). Free memory was 55.9 MB in the beginning and 112.8 MB in the end (delta: -57.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,673 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:42:16,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.66 ms. Allocated memory is still 96.5 MB. Free memory was 55.7 MB in the beginning and 71.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:42:16,675 INFO L168 Benchmark]: Boogie Preprocessor took 51.66 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.5 MB in the end (delta: 917.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,676 INFO L168 Benchmark]: RCFGBuilder took 517.42 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 57.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,676 INFO L168 Benchmark]: TraceAbstraction took 15099.45 ms. Allocated memory was 96.5 MB in the beginning and 180.4 MB in the end (delta: 83.9 MB). Free memory was 57.0 MB in the beginning and 115.0 MB in the end (delta: -58.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,677 INFO L168 Benchmark]: Witness Printer took 74.97 ms. Allocated memory is still 180.4 MB. Free memory was 115.0 MB in the beginning and 112.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:42:16,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 96.5 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 345.66 ms. Allocated memory is still 96.5 MB. Free memory was 55.7 MB in the beginning and 71.0 MB in the end (delta: -15.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.0 MB in the beginning and 69.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.66 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.5 MB in the end (delta: 917.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 517.42 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 57.2 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15099.45 ms. Allocated memory was 96.5 MB in the beginning and 180.4 MB in the end (delta: 83.9 MB). Free memory was 57.0 MB in the beginning and 115.0 MB in the end (delta: -58.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 74.97 ms. Allocated memory is still 180.4 MB. Free memory was 115.0 MB in the beginning and 112.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.9s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 686 SDtfs, 1285 SDslu, 3094 SDs, 0 SdLazy, 2345 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 523 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=545occurred in iteration=18, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 1767 NumberOfCodeBlocks, 1767 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1736 ConstructedInterpolants, 0 QuantifiedInterpolants, 10171 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-02 22:42:16,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42f26664-167f-4549-b25f-65b674347351/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE