./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0 --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:41:34,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:41:34,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:41:34,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:41:34,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:41:34,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:41:34,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:41:34,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:41:34,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:41:34,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:41:34,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:41:34,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:41:34,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:41:34,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:41:34,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:41:34,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:41:34,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:41:34,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:41:34,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:41:34,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:41:34,143 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:41:34,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:41:34,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:41:34,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:41:34,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:41:34,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:41:34,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:41:34,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:41:34,162 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:41:34,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:41:34,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:41:34,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:41:34,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:41:34,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:41:34,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:41:34,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:41:34,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:41:34,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:41:34,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:41:34,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:41:34,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:41:34,180 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:41:34,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:41:34,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:41:34,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:41:34,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:41:34,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:41:34,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:41:34,240 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:41:34,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:41:34,240 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:41:34,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:41:34,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:41:34,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:41:34,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:41:34,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:41:34,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:41:34,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:41:34,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:41:34,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:41:34,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:41:34,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:41:34,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:41:34,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:41:34,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:34,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:41:34,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:41:34,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:41:34,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:41:34,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:41:34,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:41:34,248 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:41:34,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:41:34,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:41:34,249 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_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2021-11-22 14:41:34,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:41:34,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:41:34,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:41:34,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:41:34,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:41:34,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-22 14:41:34,745 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/data/4d53459d9/b9e8bbc91bea4e9d8f80005ce1b9c4df/FLAGc7ffefc3c [2021-11-22 14:41:35,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:41:35,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2021-11-22 14:41:35,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/data/4d53459d9/b9e8bbc91bea4e9d8f80005ce1b9c4df/FLAGc7ffefc3c [2021-11-22 14:41:35,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/data/4d53459d9/b9e8bbc91bea4e9d8f80005ce1b9c4df [2021-11-22 14:41:35,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:41:35,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:41:35,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:35,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:41:35,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:41:35,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:35,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677c0623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35, skipping insertion in model container [2021-11-22 14:41:35,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:35,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:41:35,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:41:35,895 WARN L230 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_044141e1-fb5f-4c75-953e-bc68f03ea795/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-22 14:41:35,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:35,914 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:41:35,938 WARN L230 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_044141e1-fb5f-4c75-953e-bc68f03ea795/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2021-11-22 14:41:35,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:41:35,959 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:41:35,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35 WrapperNode [2021-11-22 14:41:35,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:41:35,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:35,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:41:35,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:41:35,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:35,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,008 INFO L137 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2021-11-22 14:41:36,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:41:36,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:41:36,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:41:36,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:41:36,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:41:36,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:41:36,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:41:36,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:41:36,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (1/1) ... [2021-11-22 14:41:36,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:41:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:36,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:41:36,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:41:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:41:36,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-22 14:41:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-22 14:41:36,201 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-22 14:41:36,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-22 14:41:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:41:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:41:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:41:36,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 14:41:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:41:36,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:41:36,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:41:36,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:41:36,207 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-22 14:41:36,322 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:41:36,323 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:41:36,677 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:41:36,705 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:41:36,705 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-22 14:41:36,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:36 BoogieIcfgContainer [2021-11-22 14:41:36,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:41:36,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:41:36,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:41:36,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:41:36,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:41:35" (1/3) ... [2021-11-22 14:41:36,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e24f10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:36, skipping insertion in model container [2021-11-22 14:41:36,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:41:35" (2/3) ... [2021-11-22 14:41:36,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e24f10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:41:36, skipping insertion in model container [2021-11-22 14:41:36,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:41:36" (3/3) ... [2021-11-22 14:41:36,735 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2021-11-22 14:41:36,741 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-22 14:41:36,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:41:36,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:41:36,742 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-22 14:41:36,810 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,811 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,811 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,812 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,813 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,814 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,815 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,816 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,817 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,817 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,817 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,818 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,818 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,818 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,819 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,819 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,819 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,820 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,820 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,820 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,821 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,822 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,823 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,823 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,823 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,824 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,824 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,824 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,825 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,825 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,825 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,826 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,826 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,826 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,827 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,828 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,829 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,830 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,831 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,835 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,835 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,835 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,836 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,836 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,840 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,840 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,841 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-22 14:41:36,845 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-22 14:41:36,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:41:36,956 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 [2021-11-22 14:41:36,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-22 14:41:36,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2021-11-22 14:41:37,077 INFO L129 PetriNetUnfolder]: 15/172 cut-off events. [2021-11-22 14:41:37,077 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 14:41:37,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2021-11-22 14:41:37,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2021-11-22 14:41:37,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2021-11-22 14:41:37,152 INFO L129 PetriNetUnfolder]: 15/162 cut-off events. [2021-11-22 14:41:37,152 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-22 14:41:37,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:37,154 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:37,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1906392923, now seen corresponding path program 1 times [2021-11-22 14:41:37,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:37,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261194505] [2021-11-22 14:41:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:37,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:37,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:37,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261194505] [2021-11-22 14:41:37,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261194505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:37,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:37,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:41:37,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77821114] [2021-11-22 14:41:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:37,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:41:37,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:41:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:41:37,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2021-11-22 14:41:37,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:37,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:37,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2021-11-22 14:41:37,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:37,586 INFO L129 PetriNetUnfolder]: 6/154 cut-off events. [2021-11-22 14:41:37,587 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-11-22 14:41:37,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 111 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2021-11-22 14:41:37,591 INFO L132 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2021-11-22 14:41:37,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2021-11-22 14:41:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:41:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-22 14:41:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2021-11-22 14:41:37,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2021-11-22 14:41:37,614 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2021-11-22 14:41:37,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2021-11-22 14:41:37,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:37,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2021-11-22 14:41:37,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:37,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:37,650 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:37,653 INFO L186 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2021-11-22 14:41:37,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2021-11-22 14:41:37,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-22 14:41:37,666 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2021-11-22 14:41:37,669 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2021-11-22 14:41:37,676 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2021-11-22 14:41:37,677 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2021-11-22 14:41:37,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:37,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:37,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:37,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:41:37,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2021-11-22 14:41:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:37,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878175021] [2021-11-22 14:41:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:37,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:38,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:38,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878175021] [2021-11-22 14:41:38,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878175021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:38,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:38,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:41:38,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926725054] [2021-11-22 14:41:38,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:38,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:41:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:41:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:41:38,296 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2021-11-22 14:41:38,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:38,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:38,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2021-11-22 14:41:38,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:38,738 INFO L129 PetriNetUnfolder]: 171/632 cut-off events. [2021-11-22 14:41:38,738 INFO L130 PetriNetUnfolder]: For 22/35 co-relation queries the response was YES. [2021-11-22 14:41:38,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 632 events. 171/632 cut-off events. For 22/35 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3069 event pairs, 41 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 961. Up to 122 conditions per place. [2021-11-22 14:41:38,751 INFO L132 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2021-11-22 14:41:38,751 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2021-11-22 14:41:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:41:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-22 14:41:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2021-11-22 14:41:38,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2021-11-22 14:41:38,764 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2021-11-22 14:41:38,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2021-11-22 14:41:38,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:38,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2021-11-22 14:41:38,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:38,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:38,778 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:38,778 INFO L186 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2021-11-22 14:41:38,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2021-11-22 14:41:38,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-22 14:41:38,793 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2021-11-22 14:41:38,794 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2021-11-22 14:41:38,796 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2021-11-22 14:41:38,796 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2021-11-22 14:41:38,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:38,798 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:38,798 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:41:38,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1543221727, now seen corresponding path program 1 times [2021-11-22 14:41:38,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:38,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946214714] [2021-11-22 14:41:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:38,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:39,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946214714] [2021-11-22 14:41:39,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946214714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:39,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:39,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:39,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939935741] [2021-11-22 14:41:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:39,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:39,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:39,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-22 14:41:39,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:39,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-22 14:41:39,102 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:39,479 INFO L129 PetriNetUnfolder]: 120/694 cut-off events. [2021-11-22 14:41:39,479 INFO L130 PetriNetUnfolder]: For 28/38 co-relation queries the response was YES. [2021-11-22 14:41:39,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 998 conditions, 694 events. 120/694 cut-off events. For 28/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3411 event pairs, 38 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 991. Up to 86 conditions per place. [2021-11-22 14:41:39,490 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 64 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2021-11-22 14:41:39,491 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 188 transitions, 570 flow [2021-11-22 14:41:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:41:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 14:41:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1318 transitions. [2021-11-22 14:41:39,505 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7574712643678161 [2021-11-22 14:41:39,505 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1318 transitions. [2021-11-22 14:41:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1318 transitions. [2021-11-22 14:41:39,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:39,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1318 transitions. [2021-11-22 14:41:39,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.8) internal successors, (1318), 10 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,522 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,522 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1318 transitions. [2021-11-22 14:41:39,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 188 transitions, 570 flow [2021-11-22 14:41:39,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 566 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-22 14:41:39,538 INFO L242 Difference]: Finished difference. Result has 162 places, 156 transitions, 375 flow [2021-11-22 14:41:39,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=375, PETRI_PLACES=162, PETRI_TRANSITIONS=156} [2021-11-22 14:41:39,542 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 7 predicate places. [2021-11-22 14:41:39,542 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 156 transitions, 375 flow [2021-11-22 14:41:39,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,544 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:39,544 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:39,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:41:39,545 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1522524733, now seen corresponding path program 1 times [2021-11-22 14:41:39,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:39,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401872341] [2021-11-22 14:41:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:39,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:39,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:39,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401872341] [2021-11-22 14:41:39,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401872341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:39,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:39,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:39,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654842154] [2021-11-22 14:41:39,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:39,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:39,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:39,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:39,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:39,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-22 14:41:39,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 156 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:39,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:39,752 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-22 14:41:39,752 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:40,078 INFO L129 PetriNetUnfolder]: 106/574 cut-off events. [2021-11-22 14:41:40,079 INFO L130 PetriNetUnfolder]: For 77/86 co-relation queries the response was YES. [2021-11-22 14:41:40,081 INFO L84 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 574 events. 106/574 cut-off events. For 77/86 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2430 event pairs, 37 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 897. Up to 97 conditions per place. [2021-11-22 14:41:40,085 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 45 selfloop transitions, 11 changer transitions 19/186 dead transitions. [2021-11-22 14:41:40,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 186 transitions, 597 flow [2021-11-22 14:41:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:41:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-22 14:41:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1315 transitions. [2021-11-22 14:41:40,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7557471264367817 [2021-11-22 14:41:40,092 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1315 transitions. [2021-11-22 14:41:40,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1315 transitions. [2021-11-22 14:41:40,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:40,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1315 transitions. [2021-11-22 14:41:40,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.5) internal successors, (1315), 10 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,107 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,107 INFO L186 Difference]: Start difference. First operand has 162 places, 156 transitions, 375 flow. Second operand 10 states and 1315 transitions. [2021-11-22 14:41:40,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 186 transitions, 597 flow [2021-11-22 14:41:40,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 186 transitions, 589 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-11-22 14:41:40,130 INFO L242 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2021-11-22 14:41:40,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2021-11-22 14:41:40,134 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2021-11-22 14:41:40,134 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2021-11-22 14:41:40,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:40,136 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:40,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:41:40,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1897785128, now seen corresponding path program 1 times [2021-11-22 14:41:40,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:40,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847756592] [2021-11-22 14:41:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:40,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847756592] [2021-11-22 14:41:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847756592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:40,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:40,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488870031] [2021-11-22 14:41:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:40,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:40,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-22 14:41:40,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:40,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-22 14:41:40,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:40,652 INFO L129 PetriNetUnfolder]: 121/711 cut-off events. [2021-11-22 14:41:40,653 INFO L130 PetriNetUnfolder]: For 141/151 co-relation queries the response was YES. [2021-11-22 14:41:40,657 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1125 conditions, 711 events. 121/711 cut-off events. For 141/151 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3685 event pairs, 38 based on Foata normal form. 6/675 useless extension candidates. Maximal degree in co-relation 1115. Up to 94 conditions per place. [2021-11-22 14:41:40,661 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 57 selfloop transitions, 10 changer transitions 0/178 dead transitions. [2021-11-22 14:41:40,661 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 178 transitions, 592 flow [2021-11-22 14:41:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:41:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 14:41:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1058 transitions. [2021-11-22 14:41:40,667 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7600574712643678 [2021-11-22 14:41:40,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1058 transitions. [2021-11-22 14:41:40,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1058 transitions. [2021-11-22 14:41:40,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:40,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1058 transitions. [2021-11-22 14:41:40,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.25) internal successors, (1058), 8 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,678 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,679 INFO L186 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1058 transitions. [2021-11-22 14:41:40,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 178 transitions, 592 flow [2021-11-22 14:41:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 178 transitions, 557 flow, removed 5 selfloop flow, removed 10 redundant places. [2021-11-22 14:41:40,690 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2021-11-22 14:41:40,690 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2021-11-22 14:41:40,694 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2021-11-22 14:41:40,697 INFO L470 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2021-11-22 14:41:40,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,698 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:40,698 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:40,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:41:40,699 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1055001396, now seen corresponding path program 1 times [2021-11-22 14:41:40,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:40,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442271170] [2021-11-22 14:41:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:40,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:40,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:40,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442271170] [2021-11-22 14:41:40,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442271170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:40,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:40,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:41:40,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70380606] [2021-11-22 14:41:40,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:40,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:41:40,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:41:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:41:40,896 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2021-11-22 14:41:40,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:40,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:40,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2021-11-22 14:41:40,899 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:41,161 INFO L129 PetriNetUnfolder]: 105/546 cut-off events. [2021-11-22 14:41:41,161 INFO L130 PetriNetUnfolder]: For 101/110 co-relation queries the response was YES. [2021-11-22 14:41:41,164 INFO L84 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 546 events. 105/546 cut-off events. For 101/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2352 event pairs, 37 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 884. Up to 97 conditions per place. [2021-11-22 14:41:41,168 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 48 selfloop transitions, 9 changer transitions 7/175 dead transitions. [2021-11-22 14:41:41,168 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 175 transitions, 574 flow [2021-11-22 14:41:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:41:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-22 14:41:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1055 transitions. [2021-11-22 14:41:41,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7579022988505747 [2021-11-22 14:41:41,174 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1055 transitions. [2021-11-22 14:41:41,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1055 transitions. [2021-11-22 14:41:41,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:41,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1055 transitions. [2021-11-22 14:41:41,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.875) internal successors, (1055), 8 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:41,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:41,185 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:41,185 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1055 transitions. [2021-11-22 14:41:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 175 transitions, 574 flow [2021-11-22 14:41:41,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 175 transitions, 556 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-22 14:41:41,195 INFO L242 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2021-11-22 14:41:41,196 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2021-11-22 14:41:41,199 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2021-11-22 14:41:41,199 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2021-11-22 14:41:41,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:41,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:41,201 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:41,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:41:41,201 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1703942293, now seen corresponding path program 1 times [2021-11-22 14:41:41,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102695231] [2021-11-22 14:41:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:41,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:41,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:41,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102695231] [2021-11-22 14:41:41,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102695231] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:41,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26868305] [2021-11-22 14:41:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:41,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:41,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:41,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:41:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:41:41,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:42,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:43,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26868305] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:43,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:43,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-11-22 14:41:43,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884930860] [2021-11-22 14:41:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:43,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:41:43,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:41:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:41:43,927 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-11-22 14:41:43,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:43,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:43,932 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-11-22 14:41:43,932 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:44,492 INFO L129 PetriNetUnfolder]: 81/524 cut-off events. [2021-11-22 14:41:44,492 INFO L130 PetriNetUnfolder]: For 126/133 co-relation queries the response was YES. [2021-11-22 14:41:44,495 INFO L84 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 524 events. 81/524 cut-off events. For 126/133 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2305 event pairs, 28 based on Foata normal form. 7/499 useless extension candidates. Maximal degree in co-relation 857. Up to 80 conditions per place. [2021-11-22 14:41:44,499 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 47 selfloop transitions, 15 changer transitions 0/171 dead transitions. [2021-11-22 14:41:44,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 171 transitions, 564 flow [2021-11-22 14:41:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:41:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-22 14:41:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2021-11-22 14:41:44,508 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2021-11-22 14:41:44,508 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2021-11-22 14:41:44,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2021-11-22 14:41:44,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:44,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2021-11-22 14:41:44,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:44,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:44,525 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:44,526 INFO L186 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1768 transitions. [2021-11-22 14:41:44,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 171 transitions, 564 flow [2021-11-22 14:41:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 171 transitions, 534 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-11-22 14:41:44,533 INFO L242 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2021-11-22 14:41:44,533 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2021-11-22 14:41:44,534 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2021-11-22 14:41:44,535 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2021-11-22 14:41:44,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:44,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:44,536 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:44,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:44,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:44,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2100548871, now seen corresponding path program 1 times [2021-11-22 14:41:44,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452803722] [2021-11-22 14:41:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:44,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:45,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452803722] [2021-11-22 14:41:45,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452803722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:45,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467009168] [2021-11-22 14:41:45,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:45,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:45,051 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:45,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:41:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:41:45,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:46,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:41:47,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467009168] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:47,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:41:47,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2021-11-22 14:41:47,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867621126] [2021-11-22 14:41:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:47,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 14:41:47,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:47,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 14:41:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:41:47,087 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2021-11-22 14:41:47,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:47,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2021-11-22 14:41:47,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:47,601 INFO L129 PetriNetUnfolder]: 64/579 cut-off events. [2021-11-22 14:41:47,601 INFO L130 PetriNetUnfolder]: For 205/206 co-relation queries the response was YES. [2021-11-22 14:41:47,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 944 conditions, 579 events. 64/579 cut-off events. For 205/206 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2857 event pairs, 23 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 932. Up to 62 conditions per place. [2021-11-22 14:41:47,608 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 52 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2021-11-22 14:41:47,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 176 transitions, 620 flow [2021-11-22 14:41:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:41:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-11-22 14:41:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2021-11-22 14:41:47,616 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2021-11-22 14:41:47,617 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2021-11-22 14:41:47,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2021-11-22 14:41:47,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:47,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2021-11-22 14:41:47,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,635 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,635 INFO L186 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1770 transitions. [2021-11-22 14:41:47,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 176 transitions, 620 flow [2021-11-22 14:41:47,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 176 transitions, 597 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-11-22 14:41:47,670 INFO L242 Difference]: Finished difference. Result has 182 places, 159 transitions, 447 flow [2021-11-22 14:41:47,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=447, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2021-11-22 14:41:47,671 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2021-11-22 14:41:47,671 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 447 flow [2021-11-22 14:41:47,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:47,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:47,673 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:47,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:47,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:47,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash 864077398, now seen corresponding path program 1 times [2021-11-22 14:41:47,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:47,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406730915] [2021-11-22 14:41:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:47,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:48,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406730915] [2021-11-22 14:41:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406730915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:48,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914872880] [2021-11-22 14:41:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:48,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:48,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:48,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:41:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:48,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 14:41:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-22 14:41:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:49,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:50,077 INFO L354 Elim1Store]: treesize reduction 56, result has 48.6 percent of original size [2021-11-22 14:41:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2021-11-22 14:41:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:50,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914872880] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:50,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:50,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 9] total 27 [2021-11-22 14:41:50,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794558237] [2021-11-22 14:41:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:50,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-22 14:41:50,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-22 14:41:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-11-22 14:41:50,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:41:50,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 447 flow. Second operand has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:50,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:50,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:41:50,454 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:53,363 INFO L129 PetriNetUnfolder]: 2823/5593 cut-off events. [2021-11-22 14:41:53,364 INFO L130 PetriNetUnfolder]: For 2597/2597 co-relation queries the response was YES. [2021-11-22 14:41:53,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 5593 events. 2823/5593 cut-off events. For 2597/2597 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 42068 event pairs, 189 based on Foata normal form. 0/5261 useless extension candidates. Maximal degree in co-relation 11947. Up to 1582 conditions per place. [2021-11-22 14:41:53,431 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 297 selfloop transitions, 100 changer transitions 4/494 dead transitions. [2021-11-22 14:41:53,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 494 transitions, 2157 flow [2021-11-22 14:41:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:41:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-22 14:41:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5080 transitions. [2021-11-22 14:41:53,509 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.648786717752235 [2021-11-22 14:41:53,510 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5080 transitions. [2021-11-22 14:41:53,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5080 transitions. [2021-11-22 14:41:53,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:53,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5080 transitions. [2021-11-22 14:41:53,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 112.88888888888889) internal successors, (5080), 45 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:53,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:53,571 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 174.0) internal successors, (8004), 46 states have internal predecessors, (8004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:53,581 INFO L186 Difference]: Start difference. First operand has 182 places, 159 transitions, 447 flow. Second operand 45 states and 5080 transitions. [2021-11-22 14:41:53,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 494 transitions, 2157 flow [2021-11-22 14:41:53,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 494 transitions, 2114 flow, removed 7 selfloop flow, removed 11 redundant places. [2021-11-22 14:41:53,602 INFO L242 Difference]: Finished difference. Result has 238 places, 244 transitions, 1100 flow [2021-11-22 14:41:53,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1100, PETRI_PLACES=238, PETRI_TRANSITIONS=244} [2021-11-22 14:41:53,604 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 83 predicate places. [2021-11-22 14:41:53,604 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 244 transitions, 1100 flow [2021-11-22 14:41:53,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.66666666666667) internal successors, (2907), 27 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:53,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:53,607 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:53,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:53,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 14:41:53,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1472592122, now seen corresponding path program 2 times [2021-11-22 14:41:53,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:53,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199333498] [2021-11-22 14:41:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:53,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:54,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199333498] [2021-11-22 14:41:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199333498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:54,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:54,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:41:54,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161388325] [2021-11-22 14:41:54,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:54,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:41:54,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:54,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:41:54,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:41:54,582 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:41:54,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 244 transitions, 1100 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:54,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:54,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:41:54,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:41:57,097 INFO L129 PetriNetUnfolder]: 2844/5683 cut-off events. [2021-11-22 14:41:57,098 INFO L130 PetriNetUnfolder]: For 13335/13359 co-relation queries the response was YES. [2021-11-22 14:41:57,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17373 conditions, 5683 events. 2844/5683 cut-off events. For 13335/13359 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 42829 event pairs, 568 based on Foata normal form. 9/5657 useless extension candidates. Maximal degree in co-relation 17337. Up to 2871 conditions per place. [2021-11-22 14:41:57,280 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 193 selfloop transitions, 81 changer transitions 40/407 dead transitions. [2021-11-22 14:41:57,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 407 transitions, 2622 flow [2021-11-22 14:41:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 14:41:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-22 14:41:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3430 transitions. [2021-11-22 14:41:57,295 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.635891731553578 [2021-11-22 14:41:57,295 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3430 transitions. [2021-11-22 14:41:57,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3430 transitions. [2021-11-22 14:41:57,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:41:57,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3430 transitions. [2021-11-22 14:41:57,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.64516129032258) internal successors, (3430), 31 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:57,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:57,317 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:57,318 INFO L186 Difference]: Start difference. First operand has 238 places, 244 transitions, 1100 flow. Second operand 31 states and 3430 transitions. [2021-11-22 14:41:57,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 407 transitions, 2622 flow [2021-11-22 14:41:57,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 407 transitions, 2549 flow, removed 3 selfloop flow, removed 16 redundant places. [2021-11-22 14:41:57,490 INFO L242 Difference]: Finished difference. Result has 265 places, 274 transitions, 1630 flow [2021-11-22 14:41:57,491 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1630, PETRI_PLACES=265, PETRI_TRANSITIONS=274} [2021-11-22 14:41:57,492 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 110 predicate places. [2021-11-22 14:41:57,492 INFO L470 AbstractCegarLoop]: Abstraction has has 265 places, 274 transitions, 1630 flow [2021-11-22 14:41:57,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:57,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:41:57,493 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:57,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:41:57,494 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:41:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:57,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1057355944, now seen corresponding path program 3 times [2021-11-22 14:41:57,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:57,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62416917] [2021-11-22 14:41:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:57,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:41:58,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:58,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62416917] [2021-11-22 14:41:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62416917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:41:58,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:41:58,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-22 14:41:58,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81686689] [2021-11-22 14:41:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:41:58,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:41:58,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:41:58,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:41:58,712 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-11-22 14:41:58,715 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 274 transitions, 1630 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:58,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:41:58,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-11-22 14:41:58,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:02,763 INFO L129 PetriNetUnfolder]: 3426/6750 cut-off events. [2021-11-22 14:42:02,764 INFO L130 PetriNetUnfolder]: For 21640/21664 co-relation queries the response was YES. [2021-11-22 14:42:02,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 6750 events. 3426/6750 cut-off events. For 21640/21664 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 53532 event pairs, 451 based on Foata normal form. 48/6766 useless extension candidates. Maximal degree in co-relation 22968. Up to 1818 conditions per place. [2021-11-22 14:42:02,929 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 264 selfloop transitions, 135 changer transitions 4/490 dead transitions. [2021-11-22 14:42:02,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 490 transitions, 3681 flow [2021-11-22 14:42:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 14:42:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-22 14:42:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3714 transitions. [2021-11-22 14:42:02,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.592911877394636 [2021-11-22 14:42:02,948 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3714 transitions. [2021-11-22 14:42:02,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3714 transitions. [2021-11-22 14:42:02,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:02,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3714 transitions. [2021-11-22 14:42:02,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 103.16666666666667) internal successors, (3714), 36 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:02,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:02,989 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:02,989 INFO L186 Difference]: Start difference. First operand has 265 places, 274 transitions, 1630 flow. Second operand 36 states and 3714 transitions. [2021-11-22 14:42:02,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 490 transitions, 3681 flow [2021-11-22 14:42:03,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 490 transitions, 3497 flow, removed 76 selfloop flow, removed 17 redundant places. [2021-11-22 14:42:03,218 INFO L242 Difference]: Finished difference. Result has 291 places, 318 transitions, 2408 flow [2021-11-22 14:42:03,219 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2408, PETRI_PLACES=291, PETRI_TRANSITIONS=318} [2021-11-22 14:42:03,220 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 136 predicate places. [2021-11-22 14:42:03,220 INFO L470 AbstractCegarLoop]: Abstraction has has 291 places, 318 transitions, 2408 flow [2021-11-22 14:42:03,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:03,222 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:03,222 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:03,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:42:03,223 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:03,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:03,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1103704106, now seen corresponding path program 4 times [2021-11-22 14:42:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996623902] [2021-11-22 14:42:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:03,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:03,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996623902] [2021-11-22 14:42:03,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996623902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:03,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:03,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:42:03,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643019047] [2021-11-22 14:42:03,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:03,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:03,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:03,906 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:03,910 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 318 transitions, 2408 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:03,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:03,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:03,910 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:06,633 INFO L129 PetriNetUnfolder]: 3482/6917 cut-off events. [2021-11-22 14:42:06,634 INFO L130 PetriNetUnfolder]: For 28378/28402 co-relation queries the response was YES. [2021-11-22 14:42:06,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26014 conditions, 6917 events. 3482/6917 cut-off events. For 28378/28402 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 54804 event pairs, 1053 based on Foata normal form. 9/6876 useless extension candidates. Maximal degree in co-relation 25952. Up to 3925 conditions per place. [2021-11-22 14:42:06,759 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 212 selfloop transitions, 114 changer transitions 7/426 dead transitions. [2021-11-22 14:42:06,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 426 transitions, 3774 flow [2021-11-22 14:42:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 14:42:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-22 14:42:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3201 transitions. [2021-11-22 14:42:06,769 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6343638525564804 [2021-11-22 14:42:06,769 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3201 transitions. [2021-11-22 14:42:06,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3201 transitions. [2021-11-22 14:42:06,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:06,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3201 transitions. [2021-11-22 14:42:06,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.37931034482759) internal successors, (3201), 29 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:06,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:06,793 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:06,793 INFO L186 Difference]: Start difference. First operand has 291 places, 318 transitions, 2408 flow. Second operand 29 states and 3201 transitions. [2021-11-22 14:42:06,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 426 transitions, 3774 flow [2021-11-22 14:42:07,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 426 transitions, 3621 flow, removed 48 selfloop flow, removed 20 redundant places. [2021-11-22 14:42:07,068 INFO L242 Difference]: Finished difference. Result has 305 places, 333 transitions, 2756 flow [2021-11-22 14:42:07,069 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2756, PETRI_PLACES=305, PETRI_TRANSITIONS=333} [2021-11-22 14:42:07,070 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 150 predicate places. [2021-11-22 14:42:07,071 INFO L470 AbstractCegarLoop]: Abstraction has has 305 places, 333 transitions, 2756 flow [2021-11-22 14:42:07,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:07,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:07,072 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:07,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:42:07,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -79375042, now seen corresponding path program 1 times [2021-11-22 14:42:07,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:07,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734410421] [2021-11-22 14:42:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:07,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:07,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:07,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734410421] [2021-11-22 14:42:07,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734410421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:07,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:07,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:42:07,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261986971] [2021-11-22 14:42:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:07,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:07,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:07,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:07,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 333 transitions, 2756 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:07,842 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:07,842 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:07,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:10,723 INFO L129 PetriNetUnfolder]: 3564/7113 cut-off events. [2021-11-22 14:42:10,724 INFO L130 PetriNetUnfolder]: For 26560/26584 co-relation queries the response was YES. [2021-11-22 14:42:10,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26361 conditions, 7113 events. 3564/7113 cut-off events. For 26560/26584 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 57133 event pairs, 1245 based on Foata normal form. 19/7070 useless extension candidates. Maximal degree in co-relation 26296. Up to 3925 conditions per place. [2021-11-22 14:42:10,816 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 232 selfloop transitions, 90 changer transitions 37/452 dead transitions. [2021-11-22 14:42:10,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 452 transitions, 4174 flow [2021-11-22 14:42:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 14:42:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-22 14:42:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3336 transitions. [2021-11-22 14:42:10,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.639080459770115 [2021-11-22 14:42:10,826 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3336 transitions. [2021-11-22 14:42:10,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3336 transitions. [2021-11-22 14:42:10,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:10,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3336 transitions. [2021-11-22 14:42:10,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 111.2) internal successors, (3336), 30 states have internal predecessors, (3336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:10,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:10,850 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:10,850 INFO L186 Difference]: Start difference. First operand has 305 places, 333 transitions, 2756 flow. Second operand 30 states and 3336 transitions. [2021-11-22 14:42:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 452 transitions, 4174 flow [2021-11-22 14:42:11,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 452 transitions, 3987 flow, removed 22 selfloop flow, removed 22 redundant places. [2021-11-22 14:42:11,110 INFO L242 Difference]: Finished difference. Result has 316 places, 342 transitions, 2928 flow [2021-11-22 14:42:11,111 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2928, PETRI_PLACES=316, PETRI_TRANSITIONS=342} [2021-11-22 14:42:11,112 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 161 predicate places. [2021-11-22 14:42:11,113 INFO L470 AbstractCegarLoop]: Abstraction has has 316 places, 342 transitions, 2928 flow [2021-11-22 14:42:11,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:11,114 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:11,114 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:11,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:42:11,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:11,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2021-11-22 14:42:11,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:11,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649336326] [2021-11-22 14:42:11,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:11,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:11,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649336326] [2021-11-22 14:42:11,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649336326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:11,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:11,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-22 14:42:11,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079815769] [2021-11-22 14:42:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:11,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:42:11,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:42:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:42:11,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:11,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 342 transitions, 2928 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:11,783 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:11,783 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:11,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:14,689 INFO L129 PetriNetUnfolder]: 3657/7209 cut-off events. [2021-11-22 14:42:14,689 INFO L130 PetriNetUnfolder]: For 27674/27710 co-relation queries the response was YES. [2021-11-22 14:42:14,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26762 conditions, 7209 events. 3657/7209 cut-off events. For 27674/27710 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 57415 event pairs, 1088 based on Foata normal form. 37/7195 useless extension candidates. Maximal degree in co-relation 26693. Up to 3925 conditions per place. [2021-11-22 14:42:14,788 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 265 selfloop transitions, 155 changer transitions 1/514 dead transitions. [2021-11-22 14:42:14,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 514 transitions, 4962 flow [2021-11-22 14:42:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-22 14:42:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-11-22 14:42:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3893 transitions. [2021-11-22 14:42:14,797 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392446633825944 [2021-11-22 14:42:14,797 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3893 transitions. [2021-11-22 14:42:14,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3893 transitions. [2021-11-22 14:42:14,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:14,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3893 transitions. [2021-11-22 14:42:14,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.22857142857143) internal successors, (3893), 35 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:14,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:14,821 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:14,822 INFO L186 Difference]: Start difference. First operand has 316 places, 342 transitions, 2928 flow. Second operand 35 states and 3893 transitions. [2021-11-22 14:42:14,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 514 transitions, 4962 flow [2021-11-22 14:42:15,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 514 transitions, 4801 flow, removed 35 selfloop flow, removed 21 redundant places. [2021-11-22 14:42:15,096 INFO L242 Difference]: Finished difference. Result has 333 places, 381 transitions, 3773 flow [2021-11-22 14:42:15,098 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2813, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3773, PETRI_PLACES=333, PETRI_TRANSITIONS=381} [2021-11-22 14:42:15,099 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 178 predicate places. [2021-11-22 14:42:15,099 INFO L470 AbstractCegarLoop]: Abstraction has has 333 places, 381 transitions, 3773 flow [2021-11-22 14:42:15,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:15,100 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:15,101 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:42:15,101 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash 974409732, now seen corresponding path program 3 times [2021-11-22 14:42:15,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:15,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317383438] [2021-11-22 14:42:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:15,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:16,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317383438] [2021-11-22 14:42:16,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317383438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:16,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-22 14:42:16,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384059561] [2021-11-22 14:42:16,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:16,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:42:16,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:42:16,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:42:16,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2021-11-22 14:42:16,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 381 transitions, 3773 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:16,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:16,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2021-11-22 14:42:16,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:19,731 INFO L129 PetriNetUnfolder]: 3665/7278 cut-off events. [2021-11-22 14:42:19,731 INFO L130 PetriNetUnfolder]: For 32316/32352 co-relation queries the response was YES. [2021-11-22 14:42:19,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28069 conditions, 7278 events. 3665/7278 cut-off events. For 32316/32352 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 58661 event pairs, 1277 based on Foata normal form. 25/7252 useless extension candidates. Maximal degree in co-relation 27995. Up to 3929 conditions per place. [2021-11-22 14:42:19,824 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 229 selfloop transitions, 128 changer transitions 36/480 dead transitions. [2021-11-22 14:42:19,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 480 transitions, 5108 flow [2021-11-22 14:42:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 14:42:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-11-22 14:42:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3152 transitions. [2021-11-22 14:42:19,831 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5843529847979236 [2021-11-22 14:42:19,832 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3152 transitions. [2021-11-22 14:42:19,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3152 transitions. [2021-11-22 14:42:19,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:19,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3152 transitions. [2021-11-22 14:42:19,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.6774193548387) internal successors, (3152), 31 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:19,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:19,851 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:19,851 INFO L186 Difference]: Start difference. First operand has 333 places, 381 transitions, 3773 flow. Second operand 31 states and 3152 transitions. [2021-11-22 14:42:19,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 480 transitions, 5108 flow [2021-11-22 14:42:20,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 480 transitions, 4901 flow, removed 54 selfloop flow, removed 19 redundant places. [2021-11-22 14:42:20,133 INFO L242 Difference]: Finished difference. Result has 349 places, 379 transitions, 3845 flow [2021-11-22 14:42:20,134 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3845, PETRI_PLACES=349, PETRI_TRANSITIONS=379} [2021-11-22 14:42:20,135 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 194 predicate places. [2021-11-22 14:42:20,135 INFO L470 AbstractCegarLoop]: Abstraction has has 349 places, 379 transitions, 3845 flow [2021-11-22 14:42:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:20,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:20,136 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 14:42:20,137 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1118018948, now seen corresponding path program 4 times [2021-11-22 14:42:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482512106] [2021-11-22 14:42:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:20,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:20,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482512106] [2021-11-22 14:42:20,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482512106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:20,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:20,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-22 14:42:20,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058409498] [2021-11-22 14:42:20,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:20,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:42:20,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:42:20,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:42:20,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:20,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 379 transitions, 3845 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:20,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:20,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:20,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:24,149 INFO L129 PetriNetUnfolder]: 3954/7756 cut-off events. [2021-11-22 14:42:24,149 INFO L130 PetriNetUnfolder]: For 32939/32964 co-relation queries the response was YES. [2021-11-22 14:42:24,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29918 conditions, 7756 events. 3954/7756 cut-off events. For 32939/32964 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 62379 event pairs, 1281 based on Foata normal form. 36/7740 useless extension candidates. Maximal degree in co-relation 29840. Up to 3925 conditions per place. [2021-11-22 14:42:24,314 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 274 selfloop transitions, 179 changer transitions 0/546 dead transitions. [2021-11-22 14:42:24,315 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 546 transitions, 6173 flow [2021-11-22 14:42:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 14:42:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-22 14:42:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3574 transitions. [2021-11-22 14:42:24,323 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641882183908046 [2021-11-22 14:42:24,324 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3574 transitions. [2021-11-22 14:42:24,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3574 transitions. [2021-11-22 14:42:24,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:24,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3574 transitions. [2021-11-22 14:42:24,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.6875) internal successors, (3574), 32 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:24,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:24,347 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:24,347 INFO L186 Difference]: Start difference. First operand has 349 places, 379 transitions, 3845 flow. Second operand 32 states and 3574 transitions. [2021-11-22 14:42:24,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 546 transitions, 6173 flow [2021-11-22 14:42:24,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 546 transitions, 5946 flow, removed 17 selfloop flow, removed 25 redundant places. [2021-11-22 14:42:24,671 INFO L242 Difference]: Finished difference. Result has 362 places, 426 transitions, 4947 flow [2021-11-22 14:42:24,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4947, PETRI_PLACES=362, PETRI_TRANSITIONS=426} [2021-11-22 14:42:24,672 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 207 predicate places. [2021-11-22 14:42:24,672 INFO L470 AbstractCegarLoop]: Abstraction has has 362 places, 426 transitions, 4947 flow [2021-11-22 14:42:24,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:24,673 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:24,673 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:24,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 14:42:24,674 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2056916346, now seen corresponding path program 5 times [2021-11-22 14:42:24,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:24,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971553816] [2021-11-22 14:42:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:24,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:25,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:25,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971553816] [2021-11-22 14:42:25,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971553816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:25,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:25,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:42:25,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152551738] [2021-11-22 14:42:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:25,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:25,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:25,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 426 transitions, 4947 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:25,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:25,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:25,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:28,647 INFO L129 PetriNetUnfolder]: 4008/7799 cut-off events. [2021-11-22 14:42:28,647 INFO L130 PetriNetUnfolder]: For 39229/39254 co-relation queries the response was YES. [2021-11-22 14:42:28,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31686 conditions, 7799 events. 4008/7799 cut-off events. For 39229/39254 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 62677 event pairs, 1407 based on Foata normal form. 16/7755 useless extension candidates. Maximal degree in co-relation 31603. Up to 3925 conditions per place. [2021-11-22 14:42:28,778 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 270 selfloop transitions, 157 changer transitions 0/520 dead transitions. [2021-11-22 14:42:28,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 520 transitions, 6545 flow [2021-11-22 14:42:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 14:42:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-22 14:42:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2021-11-22 14:42:28,783 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2021-11-22 14:42:28,783 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2021-11-22 14:42:28,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2021-11-22 14:42:28,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:28,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2021-11-22 14:42:28,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,798 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,798 INFO L186 Difference]: Start difference. First operand has 362 places, 426 transitions, 4947 flow. Second operand 29 states and 3225 transitions. [2021-11-22 14:42:28,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 520 transitions, 6545 flow [2021-11-22 14:42:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 520 transitions, 6433 flow, removed 26 selfloop flow, removed 16 redundant places. [2021-11-22 14:42:29,131 INFO L242 Difference]: Finished difference. Result has 383 places, 446 transitions, 5646 flow [2021-11-22 14:42:29,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5646, PETRI_PLACES=383, PETRI_TRANSITIONS=446} [2021-11-22 14:42:29,132 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 228 predicate places. [2021-11-22 14:42:29,133 INFO L470 AbstractCegarLoop]: Abstraction has has 383 places, 446 transitions, 5646 flow [2021-11-22 14:42:29,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:29,133 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:29,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 14:42:29,134 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:29,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash -203232578, now seen corresponding path program 5 times [2021-11-22 14:42:29,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:29,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032382210] [2021-11-22 14:42:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:29,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:29,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032382210] [2021-11-22 14:42:29,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032382210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:29,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:29,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:42:29,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502269630] [2021-11-22 14:42:29,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:29,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:29,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:29,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:29,757 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 446 transitions, 5646 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:29,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:29,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:33,048 INFO L129 PetriNetUnfolder]: 4021/7862 cut-off events. [2021-11-22 14:42:33,049 INFO L130 PetriNetUnfolder]: For 40402/40427 co-relation queries the response was YES. [2021-11-22 14:42:33,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32173 conditions, 7862 events. 4021/7862 cut-off events. For 40402/40427 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 63524 event pairs, 1414 based on Foata normal form. 14/7814 useless extension candidates. Maximal degree in co-relation 32082. Up to 3925 conditions per place. [2021-11-22 14:42:33,192 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 275 selfloop transitions, 139 changer transitions 12/519 dead transitions. [2021-11-22 14:42:33,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 519 transitions, 6947 flow [2021-11-22 14:42:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 14:42:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-11-22 14:42:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3205 transitions. [2021-11-22 14:42:33,198 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6351565596512089 [2021-11-22 14:42:33,198 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3205 transitions. [2021-11-22 14:42:33,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3205 transitions. [2021-11-22 14:42:33,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:33,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3205 transitions. [2021-11-22 14:42:33,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.51724137931035) internal successors, (3205), 29 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:33,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:33,216 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:33,216 INFO L186 Difference]: Start difference. First operand has 383 places, 446 transitions, 5646 flow. Second operand 29 states and 3205 transitions. [2021-11-22 14:42:33,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 519 transitions, 6947 flow [2021-11-22 14:42:33,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 519 transitions, 6742 flow, removed 28 selfloop flow, removed 18 redundant places. [2021-11-22 14:42:33,613 INFO L242 Difference]: Finished difference. Result has 398 places, 450 transitions, 5811 flow [2021-11-22 14:42:33,614 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5443, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5811, PETRI_PLACES=398, PETRI_TRANSITIONS=450} [2021-11-22 14:42:33,615 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 243 predicate places. [2021-11-22 14:42:33,615 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 450 transitions, 5811 flow [2021-11-22 14:42:33,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:33,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:33,616 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 14:42:33,617 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1821375558, now seen corresponding path program 6 times [2021-11-22 14:42:33,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:33,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576911706] [2021-11-22 14:42:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:33,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:34,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576911706] [2021-11-22 14:42:34,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576911706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122695511] [2021-11-22 14:42:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:42:34,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:34,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:34,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:34,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:42:34,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-11-22 14:42:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-22 14:42:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-22 14:42:37,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-22 14:42:37,632 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-22 14:42:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-22 14:42:37,791 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-22 14:42:37,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-22 14:42:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:42:37,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:50,989 INFO L354 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2021-11-22 14:42:50,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31128 treesize of output 28893 [2021-11-22 14:42:53,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-22 14:42:53,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:42:53,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-22 14:42:53,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510436503] [2021-11-22 14:42:53,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:53,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:42:53,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:42:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2394, Unknown=8, NotChecked=0, Total=2652 [2021-11-22 14:42:53,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-22 14:42:53,014 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 450 transitions, 5811 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:53,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:53,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-22 14:42:53,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:42:57,165 INFO L129 PetriNetUnfolder]: 3882/7442 cut-off events. [2021-11-22 14:42:57,166 INFO L130 PetriNetUnfolder]: For 42267/42292 co-relation queries the response was YES. [2021-11-22 14:42:57,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31150 conditions, 7442 events. 3882/7442 cut-off events. For 42267/42292 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 58601 event pairs, 585 based on Foata normal form. 42/7451 useless extension candidates. Maximal degree in co-relation 31056. Up to 1844 conditions per place. [2021-11-22 14:42:57,329 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 296 selfloop transitions, 231 changer transitions 3/620 dead transitions. [2021-11-22 14:42:57,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 620 transitions, 7805 flow [2021-11-22 14:42:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-22 14:42:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-22 14:42:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3851 transitions. [2021-11-22 14:42:57,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6147828863346104 [2021-11-22 14:42:57,336 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3851 transitions. [2021-11-22 14:42:57,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3851 transitions. [2021-11-22 14:42:57,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:42:57,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3851 transitions. [2021-11-22 14:42:57,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 106.97222222222223) internal successors, (3851), 36 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:57,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:57,356 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:57,356 INFO L186 Difference]: Start difference. First operand has 398 places, 450 transitions, 5811 flow. Second operand 36 states and 3851 transitions. [2021-11-22 14:42:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 620 transitions, 7805 flow [2021-11-22 14:42:57,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 620 transitions, 7582 flow, removed 10 selfloop flow, removed 23 redundant places. [2021-11-22 14:42:57,745 INFO L242 Difference]: Finished difference. Result has 411 places, 454 transitions, 6156 flow [2021-11-22 14:42:57,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6156, PETRI_PLACES=411, PETRI_TRANSITIONS=454} [2021-11-22 14:42:57,746 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 256 predicate places. [2021-11-22 14:42:57,747 INFO L470 AbstractCegarLoop]: Abstraction has has 411 places, 454 transitions, 6156 flow [2021-11-22 14:42:57,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:57,747 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:42:57,748 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:57,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:57,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_044141e1-fb5f-4c75-953e-bc68f03ea795/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:57,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:42:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -337413404, now seen corresponding path program 6 times [2021-11-22 14:42:57,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:57,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978633995] [2021-11-22 14:42:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:57,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:42:58,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:58,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978633995] [2021-11-22 14:42:58,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978633995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:42:58,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:42:58,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:42:58,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913705005] [2021-11-22 14:42:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:42:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:42:58,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:42:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:42:58,520 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:42:58,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 454 transitions, 6156 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:58,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:42:58,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:42:58,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:01,610 INFO L129 PetriNetUnfolder]: 3928/7595 cut-off events. [2021-11-22 14:43:01,610 INFO L130 PetriNetUnfolder]: For 50425/50450 co-relation queries the response was YES. [2021-11-22 14:43:01,696 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33509 conditions, 7595 events. 3928/7595 cut-off events. For 50425/50450 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 60256 event pairs, 1298 based on Foata normal form. 18/7551 useless extension candidates. Maximal degree in co-relation 33416. Up to 3702 conditions per place. [2021-11-22 14:43:01,729 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 270 selfloop transitions, 172 changer transitions 0/535 dead transitions. [2021-11-22 14:43:01,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 535 transitions, 7784 flow [2021-11-22 14:43:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 14:43:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-22 14:43:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3013 transitions. [2021-11-22 14:43:01,733 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413367390378885 [2021-11-22 14:43:01,733 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3013 transitions. [2021-11-22 14:43:01,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3013 transitions. [2021-11-22 14:43:01,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:01,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3013 transitions. [2021-11-22 14:43:01,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.5925925925926) internal successors, (3013), 27 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:01,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:01,747 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:01,747 INFO L186 Difference]: Start difference. First operand has 411 places, 454 transitions, 6156 flow. Second operand 27 states and 3013 transitions. [2021-11-22 14:43:01,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 535 transitions, 7784 flow [2021-11-22 14:43:02,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 535 transitions, 7319 flow, removed 9 selfloop flow, removed 32 redundant places. [2021-11-22 14:43:02,139 INFO L242 Difference]: Finished difference. Result has 411 places, 473 transitions, 6650 flow [2021-11-22 14:43:02,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6650, PETRI_PLACES=411, PETRI_TRANSITIONS=473} [2021-11-22 14:43:02,141 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 256 predicate places. [2021-11-22 14:43:02,141 INFO L470 AbstractCegarLoop]: Abstraction has has 411 places, 473 transitions, 6650 flow [2021-11-22 14:43:02,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:02,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:02,142 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:02,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 14:43:02,143 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:02,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1559492904, now seen corresponding path program 7 times [2021-11-22 14:43:02,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369874772] [2021-11-22 14:43:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:02,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:02,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369874772] [2021-11-22 14:43:02,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369874772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:02,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:02,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:43:02,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560622780] [2021-11-22 14:43:02,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:02,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:02,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:02,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:02,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:02,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:02,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 473 transitions, 6650 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:02,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:02,732 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:02,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:05,382 INFO L129 PetriNetUnfolder]: 3988/7687 cut-off events. [2021-11-22 14:43:05,382 INFO L130 PetriNetUnfolder]: For 49187/49212 co-relation queries the response was YES. [2021-11-22 14:43:05,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34246 conditions, 7687 events. 3988/7687 cut-off events. For 49187/49212 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61023 event pairs, 1278 based on Foata normal form. 22/7648 useless extension candidates. Maximal degree in co-relation 34148. Up to 3702 conditions per place. [2021-11-22 14:43:05,539 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 288 selfloop transitions, 187 changer transitions 0/568 dead transitions. [2021-11-22 14:43:05,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 568 transitions, 8592 flow [2021-11-22 14:43:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 14:43:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-22 14:43:05,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2906 transitions. [2021-11-22 14:43:05,542 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6423519009725907 [2021-11-22 14:43:05,542 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2906 transitions. [2021-11-22 14:43:05,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2906 transitions. [2021-11-22 14:43:05,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:05,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2906 transitions. [2021-11-22 14:43:05,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.76923076923077) internal successors, (2906), 26 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,552 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,552 INFO L186 Difference]: Start difference. First operand has 411 places, 473 transitions, 6650 flow. Second operand 26 states and 2906 transitions. [2021-11-22 14:43:05,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 568 transitions, 8592 flow [2021-11-22 14:43:05,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 568 transitions, 8352 flow, removed 4 selfloop flow, removed 21 redundant places. [2021-11-22 14:43:05,957 INFO L242 Difference]: Finished difference. Result has 421 places, 499 transitions, 7616 flow [2021-11-22 14:43:05,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7616, PETRI_PLACES=421, PETRI_TRANSITIONS=499} [2021-11-22 14:43:05,959 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 266 predicate places. [2021-11-22 14:43:05,959 INFO L470 AbstractCegarLoop]: Abstraction has has 421 places, 499 transitions, 7616 flow [2021-11-22 14:43:05,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:05,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:05,960 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:05,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 14:43:05,961 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1944326404, now seen corresponding path program 8 times [2021-11-22 14:43:05,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:05,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494039531] [2021-11-22 14:43:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:05,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:06,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:06,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494039531] [2021-11-22 14:43:06,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494039531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:06,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:06,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:43:06,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669474724] [2021-11-22 14:43:06,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:06,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:06,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:06,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:06,528 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:06,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 499 transitions, 7616 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:06,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:06,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:06,530 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:09,424 INFO L129 PetriNetUnfolder]: 3981/7681 cut-off events. [2021-11-22 14:43:09,424 INFO L130 PetriNetUnfolder]: For 53040/53065 co-relation queries the response was YES. [2021-11-22 14:43:09,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34745 conditions, 7681 events. 3981/7681 cut-off events. For 53040/53065 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61037 event pairs, 1290 based on Foata normal form. 18/7639 useless extension candidates. Maximal degree in co-relation 34641. Up to 3702 conditions per place. [2021-11-22 14:43:09,591 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 278 selfloop transitions, 195 changer transitions 0/566 dead transitions. [2021-11-22 14:43:09,591 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 566 transitions, 8962 flow [2021-11-22 14:43:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 14:43:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-11-22 14:43:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3019 transitions. [2021-11-22 14:43:09,596 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6426138782460622 [2021-11-22 14:43:09,596 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3019 transitions. [2021-11-22 14:43:09,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3019 transitions. [2021-11-22 14:43:09,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:09,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3019 transitions. [2021-11-22 14:43:09,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 111.81481481481481) internal successors, (3019), 27 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:09,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:09,608 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:09,608 INFO L186 Difference]: Start difference. First operand has 421 places, 499 transitions, 7616 flow. Second operand 27 states and 3019 transitions. [2021-11-22 14:43:09,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 566 transitions, 8962 flow [2021-11-22 14:43:10,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 566 transitions, 8714 flow, removed 1 selfloop flow, removed 20 redundant places. [2021-11-22 14:43:10,053 INFO L242 Difference]: Finished difference. Result has 431 places, 502 transitions, 7944 flow [2021-11-22 14:43:10,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7944, PETRI_PLACES=431, PETRI_TRANSITIONS=502} [2021-11-22 14:43:10,054 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 276 predicate places. [2021-11-22 14:43:10,054 INFO L470 AbstractCegarLoop]: Abstraction has has 431 places, 502 transitions, 7944 flow [2021-11-22 14:43:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:10,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:10,055 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:10,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 14:43:10,055 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1794322682, now seen corresponding path program 7 times [2021-11-22 14:43:10,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:10,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075303097] [2021-11-22 14:43:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:10,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:10,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075303097] [2021-11-22 14:43:10,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075303097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:10,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:10,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:43:10,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248165618] [2021-11-22 14:43:10,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:10,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:10,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:10,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:10,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:10,608 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:10,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 502 transitions, 7944 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:10,610 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:10,610 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:10,610 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:13,528 INFO L129 PetriNetUnfolder]: 3962/7668 cut-off events. [2021-11-22 14:43:13,528 INFO L130 PetriNetUnfolder]: For 55229/55254 co-relation queries the response was YES. [2021-11-22 14:43:13,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34755 conditions, 7668 events. 3962/7668 cut-off events. For 55229/55254 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61002 event pairs, 1281 based on Foata normal form. 20/7629 useless extension candidates. Maximal degree in co-relation 34648. Up to 3702 conditions per place. [2021-11-22 14:43:13,697 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 301 selfloop transitions, 162 changer transitions 7/563 dead transitions. [2021-11-22 14:43:13,697 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 563 transitions, 9041 flow [2021-11-22 14:43:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 14:43:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-22 14:43:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2892 transitions. [2021-11-22 14:43:13,702 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392572944297082 [2021-11-22 14:43:13,702 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2892 transitions. [2021-11-22 14:43:13,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2892 transitions. [2021-11-22 14:43:13,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:13,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2892 transitions. [2021-11-22 14:43:13,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.23076923076923) internal successors, (2892), 26 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:13,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:13,712 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:13,713 INFO L186 Difference]: Start difference. First operand has 431 places, 502 transitions, 7944 flow. Second operand 26 states and 2892 transitions. [2021-11-22 14:43:13,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 563 transitions, 9041 flow [2021-11-22 14:43:14,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 563 transitions, 8853 flow, removed 22 selfloop flow, removed 21 redundant places. [2021-11-22 14:43:14,160 INFO L242 Difference]: Finished difference. Result has 438 places, 497 transitions, 7943 flow [2021-11-22 14:43:14,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7943, PETRI_PLACES=438, PETRI_TRANSITIONS=497} [2021-11-22 14:43:14,162 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 283 predicate places. [2021-11-22 14:43:14,162 INFO L470 AbstractCegarLoop]: Abstraction has has 438 places, 497 transitions, 7943 flow [2021-11-22 14:43:14,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:14,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:14,163 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 14:43:14,163 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:14,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1354667942, now seen corresponding path program 9 times [2021-11-22 14:43:14,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:14,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267190306] [2021-11-22 14:43:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:14,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:14,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:14,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267190306] [2021-11-22 14:43:14,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267190306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:14,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:14,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:43:14,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223861263] [2021-11-22 14:43:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:14,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:14,717 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 497 transitions, 7943 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:14,717 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:14,717 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:14,717 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:17,584 INFO L129 PetriNetUnfolder]: 3978/7716 cut-off events. [2021-11-22 14:43:17,584 INFO L130 PetriNetUnfolder]: For 58633/58658 co-relation queries the response was YES. [2021-11-22 14:43:17,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35248 conditions, 7716 events. 3978/7716 cut-off events. For 58633/58658 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61686 event pairs, 1273 based on Foata normal form. 14/7666 useless extension candidates. Maximal degree in co-relation 35142. Up to 3702 conditions per place. [2021-11-22 14:43:17,757 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 303 selfloop transitions, 161 changer transitions 11/568 dead transitions. [2021-11-22 14:43:17,757 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 568 transitions, 9321 flow [2021-11-22 14:43:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 14:43:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-11-22 14:43:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3097 transitions. [2021-11-22 14:43:17,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6356732348111659 [2021-11-22 14:43:17,763 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3097 transitions. [2021-11-22 14:43:17,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3097 transitions. [2021-11-22 14:43:17,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:17,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3097 transitions. [2021-11-22 14:43:17,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 110.60714285714286) internal successors, (3097), 28 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:17,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:17,775 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:17,776 INFO L186 Difference]: Start difference. First operand has 438 places, 497 transitions, 7943 flow. Second operand 28 states and 3097 transitions. [2021-11-22 14:43:17,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 568 transitions, 9321 flow [2021-11-22 14:43:18,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 568 transitions, 9068 flow, removed 2 selfloop flow, removed 21 redundant places. [2021-11-22 14:43:18,259 INFO L242 Difference]: Finished difference. Result has 446 places, 495 transitions, 7980 flow [2021-11-22 14:43:18,259 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7980, PETRI_PLACES=446, PETRI_TRANSITIONS=495} [2021-11-22 14:43:18,260 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 291 predicate places. [2021-11-22 14:43:18,260 INFO L470 AbstractCegarLoop]: Abstraction has has 446 places, 495 transitions, 7980 flow [2021-11-22 14:43:18,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:18,260 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:18,261 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:18,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-22 14:43:18,261 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:18,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash -896028936, now seen corresponding path program 8 times [2021-11-22 14:43:18,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:18,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245310729] [2021-11-22 14:43:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:18,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:18,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:18,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245310729] [2021-11-22 14:43:18,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245310729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:18,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-22 14:43:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359785203] [2021-11-22 14:43:18,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:18,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 14:43:18,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 14:43:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:43:18,986 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-22 14:43:18,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 495 transitions, 7980 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:18,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:18,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-22 14:43:18,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:22,557 INFO L129 PetriNetUnfolder]: 4009/7744 cut-off events. [2021-11-22 14:43:22,557 INFO L130 PetriNetUnfolder]: For 60236/60261 co-relation queries the response was YES. [2021-11-22 14:43:22,692 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35670 conditions, 7744 events. 4009/7744 cut-off events. For 60236/60261 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 61675 event pairs, 1271 based on Foata normal form. 20/7708 useless extension candidates. Maximal degree in co-relation 35564. Up to 3703 conditions per place. [2021-11-22 14:43:22,729 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 298 selfloop transitions, 192 changer transitions 3/583 dead transitions. [2021-11-22 14:43:22,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 583 transitions, 9719 flow [2021-11-22 14:43:22,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 14:43:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-22 14:43:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2754 transitions. [2021-11-22 14:43:22,734 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6087533156498673 [2021-11-22 14:43:22,734 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2754 transitions. [2021-11-22 14:43:22,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2754 transitions. [2021-11-22 14:43:22,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:22,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2754 transitions. [2021-11-22 14:43:22,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 105.92307692307692) internal successors, (2754), 26 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:22,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:22,745 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:22,745 INFO L186 Difference]: Start difference. First operand has 446 places, 495 transitions, 7980 flow. Second operand 26 states and 2754 transitions. [2021-11-22 14:43:22,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 583 transitions, 9719 flow [2021-11-22 14:43:23,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 583 transitions, 9518 flow, removed 10 selfloop flow, removed 25 redundant places. [2021-11-22 14:43:23,316 INFO L242 Difference]: Finished difference. Result has 449 places, 515 transitions, 8704 flow [2021-11-22 14:43:23,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7788, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8704, PETRI_PLACES=449, PETRI_TRANSITIONS=515} [2021-11-22 14:43:23,317 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 294 predicate places. [2021-11-22 14:43:23,317 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 515 transitions, 8704 flow [2021-11-22 14:43:23,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:23,318 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:23,318 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:23,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 14:43:23,318 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 867412328, now seen corresponding path program 10 times [2021-11-22 14:43:23,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198423121] [2021-11-22 14:43:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:23,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:23,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198423121] [2021-11-22 14:43:23,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198423121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:23,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-22 14:43:23,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090276351] [2021-11-22 14:43:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:23,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:43:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:43:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:43:23,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:23,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 515 transitions, 8704 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:23,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:23,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:23,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:27,385 INFO L129 PetriNetUnfolder]: 3995/7747 cut-off events. [2021-11-22 14:43:27,385 INFO L130 PetriNetUnfolder]: For 65315/65337 co-relation queries the response was YES. [2021-11-22 14:43:27,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36168 conditions, 7747 events. 3995/7747 cut-off events. For 65315/65337 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 61934 event pairs, 1354 based on Foata normal form. 14/7699 useless extension candidates. Maximal degree in co-relation 36058. Up to 3702 conditions per place. [2021-11-22 14:43:27,584 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 313 selfloop transitions, 163 changer transitions 7/576 dead transitions. [2021-11-22 14:43:27,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 576 transitions, 9979 flow [2021-11-22 14:43:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 14:43:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-11-22 14:43:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2881 transitions. [2021-11-22 14:43:27,588 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6368258178603006 [2021-11-22 14:43:27,588 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2881 transitions. [2021-11-22 14:43:27,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2881 transitions. [2021-11-22 14:43:27,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:27,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2881 transitions. [2021-11-22 14:43:27,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 110.8076923076923) internal successors, (2881), 26 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:27,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:27,598 INFO L186 Difference]: Start difference. First operand has 449 places, 515 transitions, 8704 flow. Second operand 26 states and 2881 transitions. [2021-11-22 14:43:27,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 576 transitions, 9979 flow [2021-11-22 14:43:28,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 576 transitions, 9699 flow, removed 15 selfloop flow, removed 21 redundant places. [2021-11-22 14:43:28,172 INFO L242 Difference]: Finished difference. Result has 454 places, 512 transitions, 8684 flow [2021-11-22 14:43:28,173 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8684, PETRI_PLACES=454, PETRI_TRANSITIONS=512} [2021-11-22 14:43:28,174 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 299 predicate places. [2021-11-22 14:43:28,174 INFO L470 AbstractCegarLoop]: Abstraction has has 454 places, 512 transitions, 8684 flow [2021-11-22 14:43:28,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:28,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:28,175 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:28,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 14:43:28,175 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2082896642, now seen corresponding path program 9 times [2021-11-22 14:43:28,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505307821] [2021-11-22 14:43:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:28,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:28,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505307821] [2021-11-22 14:43:28,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505307821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:28,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-22 14:43:28,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727476694] [2021-11-22 14:43:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:28,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:43:28,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:43:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:43:28,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2021-11-22 14:43:28,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 512 transitions, 8684 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:28,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:28,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2021-11-22 14:43:28,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-22 14:43:32,699 INFO L129 PetriNetUnfolder]: 4354/8381 cut-off events. [2021-11-22 14:43:32,699 INFO L130 PetriNetUnfolder]: For 71886/71908 co-relation queries the response was YES. [2021-11-22 14:43:32,873 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38988 conditions, 8381 events. 4354/8381 cut-off events. For 71886/71908 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 67701 event pairs, 1285 based on Foata normal form. 42/8361 useless extension candidates. Maximal degree in co-relation 38879. Up to 3726 conditions per place. [2021-11-22 14:43:32,921 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 331 selfloop transitions, 220 changer transitions 0/644 dead transitions. [2021-11-22 14:43:32,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 644 transitions, 10658 flow [2021-11-22 14:43:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 14:43:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-11-22 14:43:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3582 transitions. [2021-11-22 14:43:32,928 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6433189655172413 [2021-11-22 14:43:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3582 transitions. [2021-11-22 14:43:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3582 transitions. [2021-11-22 14:43:32,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-22 14:43:32,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3582 transitions. [2021-11-22 14:43:32,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 111.9375) internal successors, (3582), 32 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:32,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:32,945 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:32,945 INFO L186 Difference]: Start difference. First operand has 454 places, 512 transitions, 8684 flow. Second operand 32 states and 3582 transitions. [2021-11-22 14:43:32,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 644 transitions, 10658 flow [2021-11-22 14:43:33,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 644 transitions, 10177 flow, removed 3 selfloop flow, removed 28 redundant places. [2021-11-22 14:43:33,541 INFO L242 Difference]: Finished difference. Result has 459 places, 531 transitions, 9063 flow [2021-11-22 14:43:33,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8230, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9063, PETRI_PLACES=459, PETRI_TRANSITIONS=531} [2021-11-22 14:43:33,542 INFO L334 CegarLoopForPetriNet]: 155 programPoint places, 304 predicate places. [2021-11-22 14:43:33,542 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 531 transitions, 9063 flow [2021-11-22 14:43:33,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:33,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-22 14:43:33,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 14:43:33,544 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-22 14:43:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1837180646, now seen corresponding path program 11 times [2021-11-22 14:43:33,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593974786] [2021-11-22 14:43:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:33,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:43:34,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:34,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593974786] [2021-11-22 14:43:34,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593974786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:43:34,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:43:34,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-22 14:43:34,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596453940] [2021-11-22 14:43:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:43:34,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 14:43:34,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:34,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 14:43:34,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:43:34,410 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2021-11-22 14:43:34,412 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 531 transitions, 9063 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:34,412 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-22 14:43:34,412 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2021-11-22 14:43:34,412 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand