./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8 --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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:37:08,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:37:08,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:37:08,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:37:08,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:37:08,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:37:08,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:37:08,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:37:08,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:37:08,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:37:08,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:37:08,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:37:08,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:37:08,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:37:08,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:37:08,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:37:08,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:37:08,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:37:08,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:37:08,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:37:08,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:37:08,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:37:08,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:37:08,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:37:08,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:37:08,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:37:08,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:37:08,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:37:08,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:37:08,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:37:08,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:37:08,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:37:08,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:37:08,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:37:08,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:37:08,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:37:08,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:37:08,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:37:08,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:37:08,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:37:08,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:37:08,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:37:08,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:37:08,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:37:08,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:37:08,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:37:08,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:37:08,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:37:08,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:37:08,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:37:08,279 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:37:08,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:37:08,280 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:37:08,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:37:08,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:37:08,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:37:08,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:37:08,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:37:08,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:37:08,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:37:08,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:37:08,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:37:08,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:37:08,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:37:08,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:37:08,283 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:37:08,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:37:08,283 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:37:08,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:37:08,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:37:08,284 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_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-16 11:37:08,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:37:08,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:37:08,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:37:08,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:37:08,637 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:37:08,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 11:37:08,724 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/data/9e31a1230/69435b23e4bb4c75a8aa859750ab84c8/FLAGe5ba24fae [2022-11-16 11:37:09,412 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:37:09,413 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 11:37:09,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/data/9e31a1230/69435b23e4bb4c75a8aa859750ab84c8/FLAGe5ba24fae [2022-11-16 11:37:09,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/data/9e31a1230/69435b23e4bb4c75a8aa859750ab84c8 [2022-11-16 11:37:09,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:37:09,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:37:09,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:37:09,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:37:09,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:37:09,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:37:09" (1/1) ... [2022-11-16 11:37:09,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293ab0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:09, skipping insertion in model container [2022-11-16 11:37:09,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:37:09" (1/1) ... [2022-11-16 11:37:09,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:37:09,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:37:10,054 WARN L229 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_bfcce20a-37dc-49f1-9766-87ddfdfb6179/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 11:37:10,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:37:10,072 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:37:10,099 WARN L229 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_bfcce20a-37dc-49f1-9766-87ddfdfb6179/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 11:37:10,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:37:10,116 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:37:10,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10 WrapperNode [2022-11-16 11:37:10,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:37:10,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:37:10,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:37:10,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:37:10,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,150 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,189 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-11-16 11:37:10,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:37:10,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:37:10,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:37:10,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:37:10,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:37:10,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:37:10,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:37:10,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:37:10,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (1/1) ... [2022-11-16 11:37:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:37:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:10,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:37:10,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:37:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:37:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:37:10,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:37:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:37:10,314 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:37:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:37:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:37:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:37:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:37:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:37:10,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:37:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:37:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:37:10,317 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:37:10,499 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:37:10,501 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:37:11,052 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:37:11,069 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:37:11,070 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:37:11,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:37:11 BoogieIcfgContainer [2022-11-16 11:37:11,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:37:11,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:37:11,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:37:11,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:37:11,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:37:09" (1/3) ... [2022-11-16 11:37:11,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb4183f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:37:11, skipping insertion in model container [2022-11-16 11:37:11,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:37:10" (2/3) ... [2022-11-16 11:37:11,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb4183f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:37:11, skipping insertion in model container [2022-11-16 11:37:11,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:37:11" (3/3) ... [2022-11-16 11:37:11,086 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-16 11:37:11,096 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:37:11,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:37:11,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:37:11,109 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:37:11,217 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:37:11,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 226 transitions, 468 flow [2022-11-16 11:37:11,450 INFO L130 PetriNetUnfolder]: 21/224 cut-off events. [2022-11-16 11:37:11,451 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:37:11,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 224 events. 21/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 226 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 153. Up to 3 conditions per place. [2022-11-16 11:37:11,462 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 226 transitions, 468 flow [2022-11-16 11:37:11,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 215 transitions, 442 flow [2022-11-16 11:37:11,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:37:11,517 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@248337ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:37:11,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:37:11,619 INFO L130 PetriNetUnfolder]: 21/214 cut-off events. [2022-11-16 11:37:11,619 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:37:11,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:11,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:11,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1417987346, now seen corresponding path program 1 times [2022-11-16 11:37:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:11,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902768219] [2022-11-16 11:37:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:12,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:12,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902768219] [2022-11-16 11:37:12,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902768219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:12,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:12,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:37:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607681961] [2022-11-16 11:37:12,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:12,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:37:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:37:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:37:12,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 226 [2022-11-16 11:37:12,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 215 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:12,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 226 [2022-11-16 11:37:12,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:12,253 INFO L130 PetriNetUnfolder]: 10/204 cut-off events. [2022-11-16 11:37:12,253 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:37:12,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 204 events. 10/204 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 213 event pairs, 0 based on Foata normal form. 13/200 useless extension candidates. Maximal degree in co-relation 147. Up to 5 conditions per place. [2022-11-16 11:37:12,259 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 4 selfloop transitions, 0 changer transitions 7/204 dead transitions. [2022-11-16 11:37:12,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 204 transitions, 428 flow [2022-11-16 11:37:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:37:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:37:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 435 transitions. [2022-11-16 11:37:12,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9623893805309734 [2022-11-16 11:37:12,274 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 435 transitions. [2022-11-16 11:37:12,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 435 transitions. [2022-11-16 11:37:12,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:12,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 435 transitions. [2022-11-16 11:37:12,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 217.5) internal successors, (435), 2 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,315 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,318 INFO L175 Difference]: Start difference. First operand has 201 places, 215 transitions, 442 flow. Second operand 2 states and 435 transitions. [2022-11-16 11:37:12,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 204 transitions, 428 flow [2022-11-16 11:37:12,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 204 transitions, 420 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:37:12,330 INFO L231 Difference]: Finished difference. Result has 198 places, 197 transitions, 398 flow [2022-11-16 11:37:12,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=398, PETRI_PLACES=198, PETRI_TRANSITIONS=197} [2022-11-16 11:37:12,341 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -3 predicate places. [2022-11-16 11:37:12,342 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 197 transitions, 398 flow [2022-11-16 11:37:12,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 213.0) internal successors, (426), 2 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:12,343 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:12,344 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:12,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:37:12,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:12,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:12,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1078797198, now seen corresponding path program 1 times [2022-11-16 11:37:12,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:12,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180437254] [2022-11-16 11:37:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:12,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:13,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180437254] [2022-11-16 11:37:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180437254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:13,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:13,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:37:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940384711] [2022-11-16 11:37:13,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:37:13,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:37:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:37:13,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-16 11:37:13,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 197 transitions, 398 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:13,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:13,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-16 11:37:13,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:14,461 INFO L130 PetriNetUnfolder]: 53/455 cut-off events. [2022-11-16 11:37:14,461 INFO L131 PetriNetUnfolder]: For 20/24 co-relation queries the response was YES. [2022-11-16 11:37:14,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 455 events. 53/455 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1860 event pairs, 17 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 617. Up to 72 conditions per place. [2022-11-16 11:37:14,469 INFO L137 encePairwiseOnDemand]: 214/226 looper letters, 82 selfloop transitions, 3 changer transitions 11/245 dead transitions. [2022-11-16 11:37:14,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 245 transitions, 693 flow [2022-11-16 11:37:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:37:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:37:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1690 transitions. [2022-11-16 11:37:14,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7477876106194691 [2022-11-16 11:37:14,480 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1690 transitions. [2022-11-16 11:37:14,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1690 transitions. [2022-11-16 11:37:14,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:14,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1690 transitions. [2022-11-16 11:37:14,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,494 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,495 INFO L175 Difference]: Start difference. First operand has 198 places, 197 transitions, 398 flow. Second operand 10 states and 1690 transitions. [2022-11-16 11:37:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 245 transitions, 693 flow [2022-11-16 11:37:14,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 245 transitions, 693 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:37:14,507 INFO L231 Difference]: Finished difference. Result has 209 places, 199 transitions, 438 flow [2022-11-16 11:37:14,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=209, PETRI_TRANSITIONS=199} [2022-11-16 11:37:14,508 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 8 predicate places. [2022-11-16 11:37:14,508 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 199 transitions, 438 flow [2022-11-16 11:37:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:14,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:14,510 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:37:14,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:14,511 INFO L85 PathProgramCache]: Analyzing trace with hash -140729638, now seen corresponding path program 2 times [2022-11-16 11:37:14,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896423547] [2022-11-16 11:37:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:15,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:15,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:15,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896423547] [2022-11-16 11:37:15,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896423547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:15,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:15,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:37:15,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469856591] [2022-11-16 11:37:15,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:15,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:37:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:15,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:37:15,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:37:15,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 226 [2022-11-16 11:37:15,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 199 transitions, 438 flow. Second operand has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:15,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:15,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 226 [2022-11-16 11:37:15,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:15,963 INFO L130 PetriNetUnfolder]: 52/450 cut-off events. [2022-11-16 11:37:15,963 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-11-16 11:37:15,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 450 events. 52/450 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1816 event pairs, 14 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 691. Up to 72 conditions per place. [2022-11-16 11:37:15,966 INFO L137 encePairwiseOnDemand]: 216/226 looper letters, 79 selfloop transitions, 3 changer transitions 15/246 dead transitions. [2022-11-16 11:37:15,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 246 transitions, 774 flow [2022-11-16 11:37:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:37:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:37:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1688 transitions. [2022-11-16 11:37:15,972 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7469026548672566 [2022-11-16 11:37:15,972 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1688 transitions. [2022-11-16 11:37:15,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1688 transitions. [2022-11-16 11:37:15,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:15,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1688 transitions. [2022-11-16 11:37:15,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 168.8) internal successors, (1688), 10 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:15,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:15,987 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:15,987 INFO L175 Difference]: Start difference. First operand has 209 places, 199 transitions, 438 flow. Second operand 10 states and 1688 transitions. [2022-11-16 11:37:15,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 246 transitions, 774 flow [2022-11-16 11:37:15,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 246 transitions, 724 flow, removed 23 selfloop flow, removed 7 redundant places. [2022-11-16 11:37:15,997 INFO L231 Difference]: Finished difference. Result has 212 places, 197 transitions, 436 flow [2022-11-16 11:37:15,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=212, PETRI_TRANSITIONS=197} [2022-11-16 11:37:16,000 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 11 predicate places. [2022-11-16 11:37:16,000 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 197 transitions, 436 flow [2022-11-16 11:37:16,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.2) internal successors, (1632), 10 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:16,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:16,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:37:16,002 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash 372018136, now seen corresponding path program 1 times [2022-11-16 11:37:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459321834] [2022-11-16 11:37:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:16,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:16,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:16,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459321834] [2022-11-16 11:37:16,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459321834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:16,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:16,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:16,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124255236] [2022-11-16 11:37:16,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:16,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:16,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 226 [2022-11-16 11:37:16,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 197 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:16,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 226 [2022-11-16 11:37:16,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:16,174 INFO L130 PetriNetUnfolder]: 19/270 cut-off events. [2022-11-16 11:37:16,175 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 11:37:16,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 270 events. 19/270 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 557 event pairs, 3 based on Foata normal form. 3/256 useless extension candidates. Maximal degree in co-relation 328. Up to 16 conditions per place. [2022-11-16 11:37:16,177 INFO L137 encePairwiseOnDemand]: 222/226 looper letters, 11 selfloop transitions, 2 changer transitions 5/201 dead transitions. [2022-11-16 11:37:16,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 201 transitions, 488 flow [2022-11-16 11:37:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:37:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-11-16 11:37:16,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9144542772861357 [2022-11-16 11:37:16,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-11-16 11:37:16,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-11-16 11:37:16,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:16,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-11-16 11:37:16,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,190 INFO L175 Difference]: Start difference. First operand has 212 places, 197 transitions, 436 flow. Second operand 3 states and 620 transitions. [2022-11-16 11:37:16,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 201 transitions, 488 flow [2022-11-16 11:37:16,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 201 transitions, 466 flow, removed 8 selfloop flow, removed 9 redundant places. [2022-11-16 11:37:16,197 INFO L231 Difference]: Finished difference. Result has 200 places, 195 transitions, 416 flow [2022-11-16 11:37:16,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=200, PETRI_TRANSITIONS=195} [2022-11-16 11:37:16,199 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -1 predicate places. [2022-11-16 11:37:16,199 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 195 transitions, 416 flow [2022-11-16 11:37:16,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:16,200 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:37:16,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash -462119142, now seen corresponding path program 1 times [2022-11-16 11:37:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:16,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754690619] [2022-11-16 11:37:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:16,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:16,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754690619] [2022-11-16 11:37:16,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754690619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:16,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:16,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:16,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196091918] [2022-11-16 11:37:16,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:16,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:16,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:16,330 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-16 11:37:16,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 195 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:16,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-16 11:37:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:16,385 INFO L130 PetriNetUnfolder]: 18/284 cut-off events. [2022-11-16 11:37:16,385 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 11:37:16,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 284 events. 18/284 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 627 event pairs, 3 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 328. Up to 14 conditions per place. [2022-11-16 11:37:16,388 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 10 selfloop transitions, 2 changer transitions 0/199 dead transitions. [2022-11-16 11:37:16,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 199 transitions, 451 flow [2022-11-16 11:37:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:37:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-16 11:37:16,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9306784660766961 [2022-11-16 11:37:16,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-16 11:37:16,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-16 11:37:16,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:16,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-16 11:37:16,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,395 INFO L175 Difference]: Start difference. First operand has 200 places, 195 transitions, 416 flow. Second operand 3 states and 631 transitions. [2022-11-16 11:37:16,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 199 transitions, 451 flow [2022-11-16 11:37:16,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 199 transitions, 439 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-16 11:37:16,399 INFO L231 Difference]: Finished difference. Result has 196 places, 195 transitions, 412 flow [2022-11-16 11:37:16,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=196, PETRI_TRANSITIONS=195} [2022-11-16 11:37:16,401 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -5 predicate places. [2022-11-16 11:37:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 195 transitions, 412 flow [2022-11-16 11:37:16,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:16,402 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:16,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:37:16,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:16,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:16,403 INFO L85 PathProgramCache]: Analyzing trace with hash -790842312, now seen corresponding path program 1 times [2022-11-16 11:37:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:16,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164981791] [2022-11-16 11:37:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:16,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164981791] [2022-11-16 11:37:16,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164981791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:16,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:16,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:37:16,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484094848] [2022-11-16 11:37:16,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:16,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:37:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:37:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:37:16,529 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 226 [2022-11-16 11:37:16,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 195 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:16,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 226 [2022-11-16 11:37:16,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:16,592 INFO L130 PetriNetUnfolder]: 21/333 cut-off events. [2022-11-16 11:37:16,592 INFO L131 PetriNetUnfolder]: For 17/18 co-relation queries the response was YES. [2022-11-16 11:37:16,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 333 events. 21/333 cut-off events. For 17/18 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 839 event pairs, 2 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 382. Up to 25 conditions per place. [2022-11-16 11:37:16,594 INFO L137 encePairwiseOnDemand]: 223/226 looper letters, 9 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2022-11-16 11:37:16,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 198 transitions, 442 flow [2022-11-16 11:37:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:37:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:37:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2022-11-16 11:37:16,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9292035398230089 [2022-11-16 11:37:16,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2022-11-16 11:37:16,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2022-11-16 11:37:16,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:16,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2022-11-16 11:37:16,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,602 INFO L175 Difference]: Start difference. First operand has 196 places, 195 transitions, 412 flow. Second operand 3 states and 630 transitions. [2022-11-16 11:37:16,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 198 transitions, 442 flow [2022-11-16 11:37:16,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 198 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:37:16,606 INFO L231 Difference]: Finished difference. Result has 197 places, 195 transitions, 416 flow [2022-11-16 11:37:16,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=197, PETRI_TRANSITIONS=195} [2022-11-16 11:37:16,607 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, -4 predicate places. [2022-11-16 11:37:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 195 transitions, 416 flow [2022-11-16 11:37:16,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:16,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:16,609 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:37:16,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:16,610 INFO L85 PathProgramCache]: Analyzing trace with hash 41150500, now seen corresponding path program 1 times [2022-11-16 11:37:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:16,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818251447] [2022-11-16 11:37:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:16,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818251447] [2022-11-16 11:37:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818251447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:17,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:17,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-16 11:37:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098462038] [2022-11-16 11:37:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:37:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:37:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:37:17,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-16 11:37:17,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 195 transitions, 416 flow. Second operand has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:17,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:17,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-16 11:37:17,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:19,531 INFO L130 PetriNetUnfolder]: 177/1573 cut-off events. [2022-11-16 11:37:19,532 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-16 11:37:19,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 1573 events. 177/1573 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 11202 event pairs, 40 based on Foata normal form. 4/1468 useless extension candidates. Maximal degree in co-relation 2315. Up to 128 conditions per place. [2022-11-16 11:37:19,541 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 152 selfloop transitions, 37 changer transitions 13/331 dead transitions. [2022-11-16 11:37:19,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 331 transitions, 1108 flow [2022-11-16 11:37:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:37:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 11:37:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4095 transitions. [2022-11-16 11:37:19,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471238938053098 [2022-11-16 11:37:19,551 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4095 transitions. [2022-11-16 11:37:19,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4095 transitions. [2022-11-16 11:37:19,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:19,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4095 transitions. [2022-11-16 11:37:19,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 146.25) internal successors, (4095), 28 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:19,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:19,582 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 226.0) internal successors, (6554), 29 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:19,582 INFO L175 Difference]: Start difference. First operand has 197 places, 195 transitions, 416 flow. Second operand 28 states and 4095 transitions. [2022-11-16 11:37:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 331 transitions, 1108 flow [2022-11-16 11:37:19,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 331 transitions, 1104 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:37:19,591 INFO L231 Difference]: Finished difference. Result has 235 places, 220 transitions, 621 flow [2022-11-16 11:37:19,592 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=621, PETRI_PLACES=235, PETRI_TRANSITIONS=220} [2022-11-16 11:37:19,592 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 34 predicate places. [2022-11-16 11:37:19,593 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 220 transitions, 621 flow [2022-11-16 11:37:19,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 141.7) internal successors, (2834), 20 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:19,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:19,595 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:19,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:37:19,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1740695496, now seen corresponding path program 1 times [2022-11-16 11:37:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:19,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539547060] [2022-11-16 11:37:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:20,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:20,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539547060] [2022-11-16 11:37:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539547060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934512863] [2022-11-16 11:37:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:20,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:20,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:20,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:37:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:20,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934512863] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:21,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:21,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-16 11:37:21,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727376628] [2022-11-16 11:37:21,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:21,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:37:21,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:37:21,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:37:21,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-16 11:37:21,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 220 transitions, 621 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:21,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:21,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-16 11:37:21,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:22,544 INFO L130 PetriNetUnfolder]: 181/1718 cut-off events. [2022-11-16 11:37:22,545 INFO L131 PetriNetUnfolder]: For 651/667 co-relation queries the response was YES. [2022-11-16 11:37:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2954 conditions, 1718 events. 181/1718 cut-off events. For 651/667 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 12882 event pairs, 83 based on Foata normal form. 6/1600 useless extension candidates. Maximal degree in co-relation 2933. Up to 224 conditions per place. [2022-11-16 11:37:22,557 INFO L137 encePairwiseOnDemand]: 206/226 looper letters, 145 selfloop transitions, 22 changer transitions 7/303 dead transitions. [2022-11-16 11:37:22,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 303 transitions, 1218 flow [2022-11-16 11:37:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:37:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 11:37:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2941 transitions. [2022-11-16 11:37:22,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6506637168141592 [2022-11-16 11:37:22,566 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2941 transitions. [2022-11-16 11:37:22,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2941 transitions. [2022-11-16 11:37:22,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:22,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2941 transitions. [2022-11-16 11:37:22,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 147.05) internal successors, (2941), 20 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,595 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 226.0) internal successors, (4746), 21 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,603 INFO L175 Difference]: Start difference. First operand has 235 places, 220 transitions, 621 flow. Second operand 20 states and 2941 transitions. [2022-11-16 11:37:22,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 303 transitions, 1218 flow [2022-11-16 11:37:22,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 303 transitions, 1186 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-16 11:37:22,616 INFO L231 Difference]: Finished difference. Result has 250 places, 226 transitions, 705 flow [2022-11-16 11:37:22,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=705, PETRI_PLACES=250, PETRI_TRANSITIONS=226} [2022-11-16 11:37:22,619 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 49 predicate places. [2022-11-16 11:37:22,620 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 226 transitions, 705 flow [2022-11-16 11:37:22,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:22,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:22,622 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:22,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:22,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:37:22,827 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1200571892, now seen corresponding path program 2 times [2022-11-16 11:37:22,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:22,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195281937] [2022-11-16 11:37:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195281937] [2022-11-16 11:37:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195281937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477547241] [2022-11-16 11:37:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:37:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:23,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:23,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:37:23,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:37:23,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:37:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:23,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:37:23,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477547241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:23,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:37:23,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 25 [2022-11-16 11:37:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685970230] [2022-11-16 11:37:23,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:23,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:37:23,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:23,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:37:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:37:23,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 226 [2022-11-16 11:37:23,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 226 transitions, 705 flow. Second operand has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:23,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:23,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 226 [2022-11-16 11:37:23,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:24,926 INFO L130 PetriNetUnfolder]: 167/1921 cut-off events. [2022-11-16 11:37:24,927 INFO L131 PetriNetUnfolder]: For 953/987 co-relation queries the response was YES. [2022-11-16 11:37:24,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3424 conditions, 1921 events. 167/1921 cut-off events. For 953/987 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 15112 event pairs, 74 based on Foata normal form. 16/1822 useless extension candidates. Maximal degree in co-relation 3397. Up to 374 conditions per place. [2022-11-16 11:37:24,942 INFO L137 encePairwiseOnDemand]: 213/226 looper letters, 81 selfloop transitions, 4 changer transitions 17/261 dead transitions. [2022-11-16 11:37:24,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 261 transitions, 1029 flow [2022-11-16 11:37:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:37:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 11:37:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2278 transitions. [2022-11-16 11:37:24,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7199747155499368 [2022-11-16 11:37:24,948 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2278 transitions. [2022-11-16 11:37:24,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2278 transitions. [2022-11-16 11:37:24,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:24,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2278 transitions. [2022-11-16 11:37:24,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.71428571428572) internal successors, (2278), 14 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,027 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,028 INFO L175 Difference]: Start difference. First operand has 250 places, 226 transitions, 705 flow. Second operand 14 states and 2278 transitions. [2022-11-16 11:37:25,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 261 transitions, 1029 flow [2022-11-16 11:37:25,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 261 transitions, 980 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-11-16 11:37:25,041 INFO L231 Difference]: Finished difference. Result has 261 places, 226 transitions, 710 flow [2022-11-16 11:37:25,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=710, PETRI_PLACES=261, PETRI_TRANSITIONS=226} [2022-11-16 11:37:25,042 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 60 predicate places. [2022-11-16 11:37:25,042 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 226 transitions, 710 flow [2022-11-16 11:37:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:25,048 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:25,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:25,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:37:25,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 624080989, now seen corresponding path program 1 times [2022-11-16 11:37:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:25,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57099830] [2022-11-16 11:37:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:25,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:25,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:25,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57099830] [2022-11-16 11:37:25,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57099830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445919066] [2022-11-16 11:37:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:25,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:25,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:25,768 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:25,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:37:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:37:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:26,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:27,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445919066] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:27,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:27,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [15, 14] total 30 [2022-11-16 11:37:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599531658] [2022-11-16 11:37:27,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:27,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:37:27,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:27,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:37:27,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:37:27,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 226 [2022-11-16 11:37:27,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 226 transitions, 710 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:27,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:27,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 226 [2022-11-16 11:37:27,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:28,250 INFO L130 PetriNetUnfolder]: 224/2278 cut-off events. [2022-11-16 11:37:28,251 INFO L131 PetriNetUnfolder]: For 1897/1926 co-relation queries the response was YES. [2022-11-16 11:37:28,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4279 conditions, 2278 events. 224/2278 cut-off events. For 1897/1926 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 18720 event pairs, 122 based on Foata normal form. 6/2120 useless extension candidates. Maximal degree in co-relation 4242. Up to 392 conditions per place. [2022-11-16 11:37:28,271 INFO L137 encePairwiseOnDemand]: 209/226 looper letters, 152 selfloop transitions, 23 changer transitions 11/315 dead transitions. [2022-11-16 11:37:28,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 315 transitions, 1452 flow [2022-11-16 11:37:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:37:28,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:37:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2667 transitions. [2022-11-16 11:37:28,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6556047197640118 [2022-11-16 11:37:28,279 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2667 transitions. [2022-11-16 11:37:28,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2667 transitions. [2022-11-16 11:37:28,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:28,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2667 transitions. [2022-11-16 11:37:28,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 148.16666666666666) internal successors, (2667), 18 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,297 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,297 INFO L175 Difference]: Start difference. First operand has 261 places, 226 transitions, 710 flow. Second operand 18 states and 2667 transitions. [2022-11-16 11:37:28,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 315 transitions, 1452 flow [2022-11-16 11:37:28,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 315 transitions, 1344 flow, removed 50 selfloop flow, removed 12 redundant places. [2022-11-16 11:37:28,315 INFO L231 Difference]: Finished difference. Result has 262 places, 230 transitions, 787 flow [2022-11-16 11:37:28,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=787, PETRI_PLACES=262, PETRI_TRANSITIONS=230} [2022-11-16 11:37:28,317 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 61 predicate places. [2022-11-16 11:37:28,317 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 230 transitions, 787 flow [2022-11-16 11:37:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:28,318 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:28,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:28,524 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1210597440, now seen corresponding path program 1 times [2022-11-16 11:37:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:28,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127618517] [2022-11-16 11:37:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:28,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:28,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127618517] [2022-11-16 11:37:28,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127618517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:28,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:28,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:37:28,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783785348] [2022-11-16 11:37:28,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:28,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:37:28,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:37:28,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:28,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-16 11:37:28,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 230 transitions, 787 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:28,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:28,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-16 11:37:28,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:29,143 INFO L130 PetriNetUnfolder]: 293/1774 cut-off events. [2022-11-16 11:37:29,144 INFO L131 PetriNetUnfolder]: For 2056/2124 co-relation queries the response was YES. [2022-11-16 11:37:29,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3284 conditions, 1774 events. 293/1774 cut-off events. For 2056/2124 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 12589 event pairs, 145 based on Foata normal form. 1/1584 useless extension candidates. Maximal degree in co-relation 3251. Up to 431 conditions per place. [2022-11-16 11:37:29,160 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 68 selfloop transitions, 12 changer transitions 11/250 dead transitions. [2022-11-16 11:37:29,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 250 transitions, 1062 flow [2022-11-16 11:37:29,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:37:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:37:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1785 transitions. [2022-11-16 11:37:29,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-16 11:37:29,163 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1785 transitions. [2022-11-16 11:37:29,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1785 transitions. [2022-11-16 11:37:29,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:29,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1785 transitions. [2022-11-16 11:37:29,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.5) internal successors, (1785), 10 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,172 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,173 INFO L175 Difference]: Start difference. First operand has 262 places, 230 transitions, 787 flow. Second operand 10 states and 1785 transitions. [2022-11-16 11:37:29,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 250 transitions, 1062 flow [2022-11-16 11:37:29,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 250 transitions, 1023 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-16 11:37:29,188 INFO L231 Difference]: Finished difference. Result has 260 places, 224 transitions, 729 flow [2022-11-16 11:37:29,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=729, PETRI_PLACES=260, PETRI_TRANSITIONS=224} [2022-11-16 11:37:29,189 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 59 predicate places. [2022-11-16 11:37:29,189 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 224 transitions, 729 flow [2022-11-16 11:37:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:29,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:37:29,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash 867159244, now seen corresponding path program 1 times [2022-11-16 11:37:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:29,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942952301] [2022-11-16 11:37:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:29,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:29,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942952301] [2022-11-16 11:37:29,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942952301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:29,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:29,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:37:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366553290] [2022-11-16 11:37:29,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:29,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:37:29,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:37:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:29,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-16 11:37:29,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 224 transitions, 729 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:29,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-16 11:37:29,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:29,715 INFO L130 PetriNetUnfolder]: 170/1281 cut-off events. [2022-11-16 11:37:29,716 INFO L131 PetriNetUnfolder]: For 1453/1484 co-relation queries the response was YES. [2022-11-16 11:37:29,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1281 events. 170/1281 cut-off events. For 1453/1484 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 8171 event pairs, 126 based on Foata normal form. 1/1202 useless extension candidates. Maximal degree in co-relation 2408. Up to 321 conditions per place. [2022-11-16 11:37:29,727 INFO L137 encePairwiseOnDemand]: 215/226 looper letters, 45 selfloop transitions, 8 changer transitions 33/240 dead transitions. [2022-11-16 11:37:29,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 240 transitions, 964 flow [2022-11-16 11:37:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:37:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:37:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1783 transitions. [2022-11-16 11:37:29,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7889380530973451 [2022-11-16 11:37:29,730 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1783 transitions. [2022-11-16 11:37:29,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1783 transitions. [2022-11-16 11:37:29,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:29,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1783 transitions. [2022-11-16 11:37:29,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 178.3) internal successors, (1783), 10 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,740 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 226.0) internal successors, (2486), 11 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,740 INFO L175 Difference]: Start difference. First operand has 260 places, 224 transitions, 729 flow. Second operand 10 states and 1783 transitions. [2022-11-16 11:37:29,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 240 transitions, 964 flow [2022-11-16 11:37:29,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 240 transitions, 929 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-11-16 11:37:29,750 INFO L231 Difference]: Finished difference. Result has 258 places, 205 transitions, 606 flow [2022-11-16 11:37:29,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=606, PETRI_PLACES=258, PETRI_TRANSITIONS=205} [2022-11-16 11:37:29,752 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 57 predicate places. [2022-11-16 11:37:29,753 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 205 transitions, 606 flow [2022-11-16 11:37:29,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:29,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:29,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:29,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:37:29,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:29,755 INFO L85 PathProgramCache]: Analyzing trace with hash 830036503, now seen corresponding path program 1 times [2022-11-16 11:37:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:29,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393368003] [2022-11-16 11:37:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:30,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393368003] [2022-11-16 11:37:30,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393368003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:30,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341480421] [2022-11-16 11:37:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:30,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:30,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:37:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:37:30,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:30,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341480421] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:31,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:31,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-16 11:37:31,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216173799] [2022-11-16 11:37:31,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:31,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:37:31,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:31,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:37:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:37:31,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-16 11:37:31,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 205 transitions, 606 flow. Second operand has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:31,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-16 11:37:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:31,787 INFO L130 PetriNetUnfolder]: 151/1081 cut-off events. [2022-11-16 11:37:31,787 INFO L131 PetriNetUnfolder]: For 810/832 co-relation queries the response was YES. [2022-11-16 11:37:31,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 1081 events. 151/1081 cut-off events. For 810/832 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6677 event pairs, 50 based on Foata normal form. 7/1038 useless extension candidates. Maximal degree in co-relation 1964. Up to 107 conditions per place. [2022-11-16 11:37:31,798 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 72 selfloop transitions, 15 changer transitions 0/239 dead transitions. [2022-11-16 11:37:31,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 239 transitions, 929 flow [2022-11-16 11:37:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:37:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 11:37:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2447 transitions. [2022-11-16 11:37:31,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7733881163084703 [2022-11-16 11:37:31,803 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2447 transitions. [2022-11-16 11:37:31,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2447 transitions. [2022-11-16 11:37:31,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:31,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2447 transitions. [2022-11-16 11:37:31,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 174.78571428571428) internal successors, (2447), 14 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,815 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 226.0) internal successors, (3390), 15 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,815 INFO L175 Difference]: Start difference. First operand has 258 places, 205 transitions, 606 flow. Second operand 14 states and 2447 transitions. [2022-11-16 11:37:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 239 transitions, 929 flow [2022-11-16 11:37:31,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 239 transitions, 827 flow, removed 26 selfloop flow, removed 24 redundant places. [2022-11-16 11:37:31,823 INFO L231 Difference]: Finished difference. Result has 230 places, 209 transitions, 579 flow [2022-11-16 11:37:31,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=579, PETRI_PLACES=230, PETRI_TRANSITIONS=209} [2022-11-16 11:37:31,825 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-16 11:37:31,825 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 209 transitions, 579 flow [2022-11-16 11:37:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.36363636363637) internal successors, (1896), 11 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:31,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:31,826 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:31,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:32,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:32,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:32,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1955066821, now seen corresponding path program 1 times [2022-11-16 11:37:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:32,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34342701] [2022-11-16 11:37:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:32,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:32,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34342701] [2022-11-16 11:37:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34342701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:32,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:32,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:37:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069201179] [2022-11-16 11:37:32,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:37:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:37:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:32,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-16 11:37:32,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 209 transitions, 579 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:32,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-16 11:37:32,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:32,531 INFO L130 PetriNetUnfolder]: 94/772 cut-off events. [2022-11-16 11:37:32,531 INFO L131 PetriNetUnfolder]: For 367/373 co-relation queries the response was YES. [2022-11-16 11:37:32,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 772 events. 94/772 cut-off events. For 367/373 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3887 event pairs, 56 based on Foata normal form. 7/730 useless extension candidates. Maximal degree in co-relation 1341. Up to 167 conditions per place. [2022-11-16 11:37:32,538 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 59 selfloop transitions, 8 changer transitions 3/224 dead transitions. [2022-11-16 11:37:32,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 224 transitions, 778 flow [2022-11-16 11:37:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:37:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:37:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1431 transitions. [2022-11-16 11:37:32,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914823008849557 [2022-11-16 11:37:32,544 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1431 transitions. [2022-11-16 11:37:32,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1431 transitions. [2022-11-16 11:37:32,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:32,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1431 transitions. [2022-11-16 11:37:32,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.875) internal successors, (1431), 8 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,552 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,552 INFO L175 Difference]: Start difference. First operand has 230 places, 209 transitions, 579 flow. Second operand 8 states and 1431 transitions. [2022-11-16 11:37:32,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 224 transitions, 778 flow [2022-11-16 11:37:32,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 224 transitions, 756 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-11-16 11:37:32,560 INFO L231 Difference]: Finished difference. Result has 228 places, 208 transitions, 576 flow [2022-11-16 11:37:32,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=576, PETRI_PLACES=228, PETRI_TRANSITIONS=208} [2022-11-16 11:37:32,562 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 27 predicate places. [2022-11-16 11:37:32,562 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 208 transitions, 576 flow [2022-11-16 11:37:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,563 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:32,563 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:32,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:37:32,564 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1256128903, now seen corresponding path program 1 times [2022-11-16 11:37:32,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:32,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803824575] [2022-11-16 11:37:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:32,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:32,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803824575] [2022-11-16 11:37:32,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803824575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:32,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:32,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:37:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128638658] [2022-11-16 11:37:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:37:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:37:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:37:32,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 226 [2022-11-16 11:37:32,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 208 transitions, 576 flow. Second operand has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:32,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:32,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 226 [2022-11-16 11:37:32,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:33,010 INFO L130 PetriNetUnfolder]: 113/776 cut-off events. [2022-11-16 11:37:33,010 INFO L131 PetriNetUnfolder]: For 415/459 co-relation queries the response was YES. [2022-11-16 11:37:33,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 776 events. 113/776 cut-off events. For 415/459 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3720 event pairs, 65 based on Foata normal form. 27/748 useless extension candidates. Maximal degree in co-relation 1356. Up to 205 conditions per place. [2022-11-16 11:37:33,016 INFO L137 encePairwiseOnDemand]: 217/226 looper letters, 46 selfloop transitions, 6 changer transitions 13/219 dead transitions. [2022-11-16 11:37:33,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 219 transitions, 738 flow [2022-11-16 11:37:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:37:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:37:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1428 transitions. [2022-11-16 11:37:33,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898230088495575 [2022-11-16 11:37:33,019 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1428 transitions. [2022-11-16 11:37:33,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1428 transitions. [2022-11-16 11:37:33,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:33,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1428 transitions. [2022-11-16 11:37:33,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:33,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:33,031 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 226.0) internal successors, (2034), 9 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:33,031 INFO L175 Difference]: Start difference. First operand has 228 places, 208 transitions, 576 flow. Second operand 8 states and 1428 transitions. [2022-11-16 11:37:33,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 219 transitions, 738 flow [2022-11-16 11:37:33,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 219 transitions, 721 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-16 11:37:33,037 INFO L231 Difference]: Finished difference. Result has 232 places, 204 transitions, 543 flow [2022-11-16 11:37:33,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=543, PETRI_PLACES=232, PETRI_TRANSITIONS=204} [2022-11-16 11:37:33,038 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 31 predicate places. [2022-11-16 11:37:33,038 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 204 transitions, 543 flow [2022-11-16 11:37:33,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.85714285714286) internal successors, (1231), 7 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:33,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:33,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:33,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:37:33,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1001563713, now seen corresponding path program 1 times [2022-11-16 11:37:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040104769] [2022-11-16 11:37:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:33,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:33,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040104769] [2022-11-16 11:37:33,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040104769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524489771] [2022-11-16 11:37:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:33,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:33,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:33,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:37:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:33,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:37:33,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:33,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:34,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524489771] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:34,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:37:34,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 23 [2022-11-16 11:37:34,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128016604] [2022-11-16 11:37:34,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:34,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:37:34,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:37:34,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:37:34,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 226 [2022-11-16 11:37:34,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 204 transitions, 543 flow. Second operand has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:34,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 226 [2022-11-16 11:37:34,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:34,875 INFO L130 PetriNetUnfolder]: 102/732 cut-off events. [2022-11-16 11:37:34,875 INFO L131 PetriNetUnfolder]: For 366/397 co-relation queries the response was YES. [2022-11-16 11:37:34,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 732 events. 102/732 cut-off events. For 366/397 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3647 event pairs, 24 based on Foata normal form. 36/732 useless extension candidates. Maximal degree in co-relation 1268. Up to 139 conditions per place. [2022-11-16 11:37:34,881 INFO L137 encePairwiseOnDemand]: 212/226 looper letters, 48 selfloop transitions, 13 changer transitions 0/213 dead transitions. [2022-11-16 11:37:34,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 213 transitions, 712 flow [2022-11-16 11:37:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:37:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:37:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2252 transitions. [2022-11-16 11:37:34,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7665078284547311 [2022-11-16 11:37:34,886 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2252 transitions. [2022-11-16 11:37:34,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2252 transitions. [2022-11-16 11:37:34,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:34,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2252 transitions. [2022-11-16 11:37:34,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.23076923076923) internal successors, (2252), 13 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,897 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 226.0) internal successors, (3164), 14 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,899 INFO L175 Difference]: Start difference. First operand has 232 places, 204 transitions, 543 flow. Second operand 13 states and 2252 transitions. [2022-11-16 11:37:34,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 213 transitions, 712 flow [2022-11-16 11:37:34,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 213 transitions, 677 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-16 11:37:34,905 INFO L231 Difference]: Finished difference. Result has 230 places, 205 transitions, 556 flow [2022-11-16 11:37:34,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=556, PETRI_PLACES=230, PETRI_TRANSITIONS=205} [2022-11-16 11:37:34,906 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 29 predicate places. [2022-11-16 11:37:34,906 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 205 transitions, 556 flow [2022-11-16 11:37:34,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:34,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:34,907 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:34,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:37:35,126 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:35,126 INFO L85 PathProgramCache]: Analyzing trace with hash -977050469, now seen corresponding path program 1 times [2022-11-16 11:37:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:35,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097010989] [2022-11-16 11:37:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:37:36,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097010989] [2022-11-16 11:37:36,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097010989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770094218] [2022-11-16 11:37:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:36,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:36,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:36,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:36,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:37:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:37:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:37,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770094218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:39,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:39,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 46 [2022-11-16 11:37:39,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608048607] [2022-11-16 11:37:39,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:37:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:37:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:37:39,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 226 [2022-11-16 11:37:39,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 205 transitions, 556 flow. Second operand has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:39,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:39,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 226 [2022-11-16 11:37:39,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:42,532 INFO L130 PetriNetUnfolder]: 435/2664 cut-off events. [2022-11-16 11:37:42,533 INFO L131 PetriNetUnfolder]: For 1174/1294 co-relation queries the response was YES. [2022-11-16 11:37:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5055 conditions, 2664 events. 435/2664 cut-off events. For 1174/1294 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 22572 event pairs, 198 based on Foata normal form. 119/2660 useless extension candidates. Maximal degree in co-relation 5037. Up to 317 conditions per place. [2022-11-16 11:37:42,554 INFO L137 encePairwiseOnDemand]: 202/226 looper letters, 231 selfloop transitions, 41 changer transitions 29/421 dead transitions. [2022-11-16 11:37:42,554 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 421 transitions, 1825 flow [2022-11-16 11:37:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:37:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-16 11:37:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4960 transitions. [2022-11-16 11:37:42,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6096361848574238 [2022-11-16 11:37:42,563 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4960 transitions. [2022-11-16 11:37:42,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4960 transitions. [2022-11-16 11:37:42,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:42,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4960 transitions. [2022-11-16 11:37:42,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 137.77777777777777) internal successors, (4960), 36 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,589 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,590 INFO L175 Difference]: Start difference. First operand has 230 places, 205 transitions, 556 flow. Second operand 36 states and 4960 transitions. [2022-11-16 11:37:42,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 421 transitions, 1825 flow [2022-11-16 11:37:42,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 421 transitions, 1781 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-16 11:37:42,601 INFO L231 Difference]: Finished difference. Result has 270 places, 232 transitions, 818 flow [2022-11-16 11:37:42,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=818, PETRI_PLACES=270, PETRI_TRANSITIONS=232} [2022-11-16 11:37:42,602 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-16 11:37:42,602 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 232 transitions, 818 flow [2022-11-16 11:37:42,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 133.3695652173913) internal successors, (6135), 46 states have internal predecessors, (6135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:42,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:42,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:37:42,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2064376575, now seen corresponding path program 1 times [2022-11-16 11:37:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:42,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201411197] [2022-11-16 11:37:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201411197] [2022-11-16 11:37:43,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201411197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:43,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730425293] [2022-11-16 11:37:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:43,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:43,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:43,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:37:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:37:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:44,317 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 11:37:44,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 11:37:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:44,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:44,562 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-16 11:37:44,562 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 50 [2022-11-16 11:37:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730425293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:44,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:44,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 31 [2022-11-16 11:37:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554001982] [2022-11-16 11:37:44,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:37:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:37:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:37:44,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-16 11:37:44,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 232 transitions, 818 flow. Second operand has 31 states, 31 states have (on average 154.09677419354838) internal successors, (4777), 31 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:44,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:44,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-16 11:37:44,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:37:51,995 INFO L130 PetriNetUnfolder]: 12171/28358 cut-off events. [2022-11-16 11:37:51,995 INFO L131 PetriNetUnfolder]: For 14588/14721 co-relation queries the response was YES. [2022-11-16 11:37:52,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61160 conditions, 28358 events. 12171/28358 cut-off events. For 14588/14721 co-relation queries the response was YES. Maximal size of possible extension queue 1102. Compared 305355 event pairs, 4305 based on Foata normal form. 23/27184 useless extension candidates. Maximal degree in co-relation 61126. Up to 5143 conditions per place. [2022-11-16 11:37:52,315 INFO L137 encePairwiseOnDemand]: 194/226 looper letters, 353 selfloop transitions, 93 changer transitions 0/608 dead transitions. [2022-11-16 11:37:52,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 608 transitions, 2917 flow [2022-11-16 11:37:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:37:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-16 11:37:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5847 transitions. [2022-11-16 11:37:52,447 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7186578171091446 [2022-11-16 11:37:52,447 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5847 transitions. [2022-11-16 11:37:52,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5847 transitions. [2022-11-16 11:37:52,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:37:52,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5847 transitions. [2022-11-16 11:37:52,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 162.41666666666666) internal successors, (5847), 36 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:52,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:52,475 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 226.0) internal successors, (8362), 37 states have internal predecessors, (8362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:52,476 INFO L175 Difference]: Start difference. First operand has 270 places, 232 transitions, 818 flow. Second operand 36 states and 5847 transitions. [2022-11-16 11:37:52,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 608 transitions, 2917 flow [2022-11-16 11:37:52,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 608 transitions, 2878 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-16 11:37:52,562 INFO L231 Difference]: Finished difference. Result has 314 places, 309 transitions, 1509 flow [2022-11-16 11:37:52,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1509, PETRI_PLACES=314, PETRI_TRANSITIONS=309} [2022-11-16 11:37:52,564 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 113 predicate places. [2022-11-16 11:37:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 309 transitions, 1509 flow [2022-11-16 11:37:52,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 154.09677419354838) internal successors, (4777), 31 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:52,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:37:52,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:52,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:52,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:37:52,773 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:37:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:52,773 INFO L85 PathProgramCache]: Analyzing trace with hash 598521685, now seen corresponding path program 2 times [2022-11-16 11:37:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:52,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818684643] [2022-11-16 11:37:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:37:53,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:53,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818684643] [2022-11-16 11:37:53,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818684643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:37:53,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:37:53,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-16 11:37:53,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52609403] [2022-11-16 11:37:53,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:37:53,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:37:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:53,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:37:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:37:53,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-16 11:37:53,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 309 transitions, 1509 flow. Second operand has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:53,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:37:53,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-16 11:37:53,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:02,990 INFO L130 PetriNetUnfolder]: 14584/35152 cut-off events. [2022-11-16 11:38:02,990 INFO L131 PetriNetUnfolder]: For 75327/75506 co-relation queries the response was YES. [2022-11-16 11:38:03,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101831 conditions, 35152 events. 14584/35152 cut-off events. For 75327/75506 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 401305 event pairs, 7815 based on Foata normal form. 60/34872 useless extension candidates. Maximal degree in co-relation 101777. Up to 13056 conditions per place. [2022-11-16 11:38:03,738 INFO L137 encePairwiseOnDemand]: 196/226 looper letters, 270 selfloop transitions, 122 changer transitions 0/554 dead transitions. [2022-11-16 11:38:03,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 554 transitions, 3671 flow [2022-11-16 11:38:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:38:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 11:38:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4173 transitions. [2022-11-16 11:38:03,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7101769911504425 [2022-11-16 11:38:03,769 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4173 transitions. [2022-11-16 11:38:03,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4173 transitions. [2022-11-16 11:38:03,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:03,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4173 transitions. [2022-11-16 11:38:03,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 160.5) internal successors, (4173), 26 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:03,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:03,787 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 226.0) internal successors, (6102), 27 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:03,787 INFO L175 Difference]: Start difference. First operand has 314 places, 309 transitions, 1509 flow. Second operand 26 states and 4173 transitions. [2022-11-16 11:38:03,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 554 transitions, 3671 flow [2022-11-16 11:38:04,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 554 transitions, 3640 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-11-16 11:38:04,401 INFO L231 Difference]: Finished difference. Result has 344 places, 389 transitions, 2621 flow [2022-11-16 11:38:04,401 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2621, PETRI_PLACES=344, PETRI_TRANSITIONS=389} [2022-11-16 11:38:04,402 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-16 11:38:04,402 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 389 transitions, 2621 flow [2022-11-16 11:38:04,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:04,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:38:04,404 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -519156441, now seen corresponding path program 1 times [2022-11-16 11:38:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:04,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043990031] [2022-11-16 11:38:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:04,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:38:05,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043990031] [2022-11-16 11:38:05,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043990031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:38:05,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:38:05,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-16 11:38:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357492590] [2022-11-16 11:38:05,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:38:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:38:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:38:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:38:05,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 226 [2022-11-16 11:38:05,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 389 transitions, 2621 flow. Second operand has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:05,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:05,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 226 [2022-11-16 11:38:05,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:16,670 INFO L130 PetriNetUnfolder]: 16191/40823 cut-off events. [2022-11-16 11:38:16,671 INFO L131 PetriNetUnfolder]: For 121526/121737 co-relation queries the response was YES. [2022-11-16 11:38:17,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126131 conditions, 40823 events. 16191/40823 cut-off events. For 121526/121737 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 490252 event pairs, 9677 based on Foata normal form. 72/40464 useless extension candidates. Maximal degree in co-relation 126064. Up to 13056 conditions per place. [2022-11-16 11:38:17,307 INFO L137 encePairwiseOnDemand]: 197/226 looper letters, 319 selfloop transitions, 90 changer transitions 0/571 dead transitions. [2022-11-16 11:38:17,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 571 transitions, 4784 flow [2022-11-16 11:38:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:38:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:38:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3394 transitions. [2022-11-16 11:38:17,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7151285292878213 [2022-11-16 11:38:17,314 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3394 transitions. [2022-11-16 11:38:17,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3394 transitions. [2022-11-16 11:38:17,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:17,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3394 transitions. [2022-11-16 11:38:17,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.61904761904762) internal successors, (3394), 21 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:17,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:17,336 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 226.0) internal successors, (4972), 22 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:17,336 INFO L175 Difference]: Start difference. First operand has 344 places, 389 transitions, 2621 flow. Second operand 21 states and 3394 transitions. [2022-11-16 11:38:17,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 571 transitions, 4784 flow [2022-11-16 11:38:18,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 571 transitions, 4489 flow, removed 134 selfloop flow, removed 8 redundant places. [2022-11-16 11:38:18,958 INFO L231 Difference]: Finished difference. Result has 364 places, 407 transitions, 2881 flow [2022-11-16 11:38:18,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2881, PETRI_PLACES=364, PETRI_TRANSITIONS=407} [2022-11-16 11:38:18,960 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 163 predicate places. [2022-11-16 11:38:18,960 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 407 transitions, 2881 flow [2022-11-16 11:38:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 153.6) internal successors, (3072), 20 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:18,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:18,961 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:38:18,962 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2122981981, now seen corresponding path program 3 times [2022-11-16 11:38:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:18,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379178875] [2022-11-16 11:38:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:19,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:38:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379178875] [2022-11-16 11:38:20,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379178875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481695681] [2022-11-16 11:38:20,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:38:20,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:20,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:20,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:38:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:38:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:38:20,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:21,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:38:21,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:38:21,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:38:21,977 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 11:38:21,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 11:38:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:38:22,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:38:22,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481695681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:22,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:22,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 10] total 45 [2022-11-16 11:38:22,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284447592] [2022-11-16 11:38:22,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:22,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:38:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:22,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:38:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1754, Unknown=30, NotChecked=0, Total=1980 [2022-11-16 11:38:22,619 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 226 [2022-11-16 11:38:22,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 407 transitions, 2881 flow. Second operand has 45 states, 45 states have (on average 137.46666666666667) internal successors, (6186), 45 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:22,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:22,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 226 [2022-11-16 11:38:22,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:38:40,036 INFO L130 PetriNetUnfolder]: 20726/50967 cut-off events. [2022-11-16 11:38:40,036 INFO L131 PetriNetUnfolder]: For 150386/150562 co-relation queries the response was YES. [2022-11-16 11:38:40,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160948 conditions, 50967 events. 20726/50967 cut-off events. For 150386/150562 co-relation queries the response was YES. Maximal size of possible extension queue 2001. Compared 621282 event pairs, 7425 based on Foata normal form. 162/50691 useless extension candidates. Maximal degree in co-relation 160873. Up to 12420 conditions per place. [2022-11-16 11:38:40,979 INFO L137 encePairwiseOnDemand]: 186/226 looper letters, 449 selfloop transitions, 257 changer transitions 0/837 dead transitions. [2022-11-16 11:38:40,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 837 transitions, 7182 flow [2022-11-16 11:38:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:38:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 11:38:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6355 transitions. [2022-11-16 11:38:40,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6390788415124699 [2022-11-16 11:38:40,995 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6355 transitions. [2022-11-16 11:38:40,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6355 transitions. [2022-11-16 11:38:40,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:38:40,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6355 transitions. [2022-11-16 11:38:41,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 144.4318181818182) internal successors, (6355), 44 states have internal predecessors, (6355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:41,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:41,034 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 226.0) internal successors, (10170), 45 states have internal predecessors, (10170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:41,034 INFO L175 Difference]: Start difference. First operand has 364 places, 407 transitions, 2881 flow. Second operand 44 states and 6355 transitions. [2022-11-16 11:38:41,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 837 transitions, 7182 flow [2022-11-16 11:38:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 837 transitions, 7046 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-11-16 11:38:42,800 INFO L231 Difference]: Finished difference. Result has 423 places, 544 transitions, 5231 flow [2022-11-16 11:38:42,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2785, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5231, PETRI_PLACES=423, PETRI_TRANSITIONS=544} [2022-11-16 11:38:42,801 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 222 predicate places. [2022-11-16 11:38:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 544 transitions, 5231 flow [2022-11-16 11:38:42,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 137.46666666666667) internal successors, (6186), 45 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:42,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:38:42,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:42,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:43,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:38:43,014 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:38:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1887527651, now seen corresponding path program 2 times [2022-11-16 11:38:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:43,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399428350] [2022-11-16 11:38:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:38:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:44,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399428350] [2022-11-16 11:38:44,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399428350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:44,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311303597] [2022-11-16 11:38:44,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:38:44,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:44,184 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:44,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfcce20a-37dc-49f1-9766-87ddfdfb6179/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:38:44,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:44,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:38:44,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:44,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-16 11:38:44,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:38:45,101 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:38:45,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:38:45,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:38:45,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:38:45,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:38:45,861 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-16 11:38:45,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 11:38:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:45,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:38:46,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311303597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:46,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:46,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 9] total 49 [2022-11-16 11:38:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280967141] [2022-11-16 11:38:46,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:38:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:38:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:38:46,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 226 [2022-11-16 11:38:46,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 544 transitions, 5231 flow. Second operand has 49 states, 49 states have (on average 134.40816326530611) internal successors, (6586), 49 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:46,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:38:46,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 226 [2022-11-16 11:38:46,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand