./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- 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-6b4ec56 [2022-11-20 10:47:03,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:47:03,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:47:03,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:47:03,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:47:03,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:47:03,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:47:03,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:47:03,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:47:03,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:47:03,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:47:03,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:47:03,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:47:03,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:47:03,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:47:03,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:47:03,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:47:03,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:47:03,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:47:03,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:47:03,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:47:03,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:47:03,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:47:03,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:47:03,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:47:03,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:47:03,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:47:03,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:47:03,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:47:03,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:47:03,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:47:03,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:47:03,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:47:03,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:47:03,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:47:03,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:47:03,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:47:03,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:47:03,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:47:03,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:47:03,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:47:03,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:47:03,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:47:03,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:47:03,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:47:03,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:47:03,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:47:03,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:47:03,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:47:03,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:47:03,643 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:47:03,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:47:03,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:47:03,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:47:03,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:47:03,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:47:03,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:47:03,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:47:03,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:47:03,646 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:47:03,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:47:03,646 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:47:03,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:47:03,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:47:03,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:47:03,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:47:03,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:47:03,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:47:03,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:47:03,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:47:03,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:47:03,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:47:03,649 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:47:03,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:47:03,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:47:03,649 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_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-11-20 10:47:03,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:47:03,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:47:03,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:47:03,999 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:47:03,999 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:47:04,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-20 10:47:07,215 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:47:07,506 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:47:07,506 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-20 10:47:07,525 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/data/db4300bf9/e9e75d3d1a7d4daeba1ca0ec60e22609/FLAG675820d22 [2022-11-20 10:47:07,541 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/data/db4300bf9/e9e75d3d1a7d4daeba1ca0ec60e22609 [2022-11-20 10:47:07,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:47:07,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:47:07,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:47:07,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:47:07,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:47:07,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:07" (1/1) ... [2022-11-20 10:47:07,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69df90cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:07, skipping insertion in model container [2022-11-20 10:47:07,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:07" (1/1) ... [2022-11-20 10:47:07,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:47:07,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:47:08,203 WARN L237 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_f9096901-f3a6-4607-9392-c70456717449/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-20 10:47:08,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:47:08,246 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:47:08,331 WARN L237 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_f9096901-f3a6-4607-9392-c70456717449/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-20 10:47:08,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:47:08,430 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:47:08,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08 WrapperNode [2022-11-20 10:47:08,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:47:08,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:47:08,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:47:08,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:47:08,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,530 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-20 10:47:08,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:47:08,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:47:08,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:47:08,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:47:08,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:47:08,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:47:08,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:47:08,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:47:08,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (1/1) ... [2022-11-20 10:47:08,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:47:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:08,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:47:08,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:47:08,729 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:47:08,729 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:47:08,730 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:47:08,730 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:47:08,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:47:08,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:47:08,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:47:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:47:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:47:08,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:47:08,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:47:08,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:47:08,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:47:08,734 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:47:08,913 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:47:08,915 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:47:09,216 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:47:09,225 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:47:09,225 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:47:09,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:09 BoogieIcfgContainer [2022-11-20 10:47:09,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:47:09,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:47:09,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:47:09,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:47:09,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:47:07" (1/3) ... [2022-11-20 10:47:09,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3c8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:09, skipping insertion in model container [2022-11-20 10:47:09,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:08" (2/3) ... [2022-11-20 10:47:09,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3c8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:09, skipping insertion in model container [2022-11-20 10:47:09,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:09" (3/3) ... [2022-11-20 10:47:09,235 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-11-20 10:47:09,244 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:47:09,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:47:09,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 10:47:09,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:47:09,439 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:47:09,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-20 10:47:09,581 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-20 10:47:09,582 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:47:09,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 408 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-20 10:47:09,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-20 10:47:09,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-20 10:47:09,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:47:09,613 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;@5c33591, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:47:09,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 10:47:09,654 INFO L130 PetriNetUnfolder]: 5/127 cut-off events. [2022-11-20 10:47:09,655 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 10:47:09,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:09,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:09,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash -517190214, now seen corresponding path program 1 times [2022-11-20 10:47:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:09,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147328890] [2022-11-20 10:47:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:10,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147328890] [2022-11-20 10:47:10,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147328890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:10,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:10,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:10,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405531564] [2022-11-20 10:47:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:10,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:10,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:10,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:10,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-20 10:47:10,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:10,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-20 10:47:10,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:10,558 INFO L130 PetriNetUnfolder]: 88/697 cut-off events. [2022-11-20 10:47:10,558 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 10:47:10,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 697 events. 88/697 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3111 event pairs, 32 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-20 10:47:10,567 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 20 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-20 10:47:10,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 373 flow [2022-11-20 10:47:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:47:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-20 10:47:10,583 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9274509803921569 [2022-11-20 10:47:10,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-20 10:47:10,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-20 10:47:10,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:10,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-20 10:47:10,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,606 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,608 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 325 flow. Second operand 3 states and 473 transitions. [2022-11-20 10:47:10,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 373 flow [2022-11-20 10:47:10,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 156 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 10:47:10,625 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 319 flow [2022-11-20 10:47:10,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2022-11-20 10:47:10,634 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -4 predicate places. [2022-11-20 10:47:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 319 flow [2022-11-20 10:47:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:10,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:10,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:47:10,637 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 694032677, now seen corresponding path program 1 times [2022-11-20 10:47:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862675829] [2022-11-20 10:47:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:10,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:10,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862675829] [2022-11-20 10:47:10,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862675829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:10,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:10,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:47:10,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431145852] [2022-11-20 10:47:10,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:10,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:47:10,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:47:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:10,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 170 [2022-11-20 10:47:10,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:10,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:10,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 170 [2022-11-20 10:47:10,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:11,062 INFO L130 PetriNetUnfolder]: 34/588 cut-off events. [2022-11-20 10:47:11,063 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 10:47:11,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 588 events. 34/588 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2046 event pairs, 11 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-20 10:47:11,069 INFO L137 encePairwiseOnDemand]: 165/170 looper letters, 16 selfloop transitions, 4 changer transitions 0/158 dead transitions. [2022-11-20 10:47:11,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 158 transitions, 380 flow [2022-11-20 10:47:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:47:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 10:47:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2022-11-20 10:47:11,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.913235294117647 [2022-11-20 10:47:11,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2022-11-20 10:47:11,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2022-11-20 10:47:11,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:11,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2022-11-20 10:47:11,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,083 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,083 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 319 flow. Second operand 4 states and 621 transitions. [2022-11-20 10:47:11,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 158 transitions, 380 flow [2022-11-20 10:47:11,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:47:11,116 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 344 flow [2022-11-20 10:47:11,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-11-20 10:47:11,117 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-20 10:47:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 344 flow [2022-11-20 10:47:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:11,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:47:11,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1141351082, now seen corresponding path program 1 times [2022-11-20 10:47:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:11,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755535757] [2022-11-20 10:47:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:11,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:11,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755535757] [2022-11-20 10:47:11,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755535757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:11,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:11,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321487199] [2022-11-20 10:47:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:11,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:11,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:11,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-20 10:47:11,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:11,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-20 10:47:11,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:11,609 INFO L130 PetriNetUnfolder]: 127/1265 cut-off events. [2022-11-20 10:47:11,610 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-20 10:47:11,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 1265 events. 127/1265 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6947 event pairs, 33 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-20 10:47:11,623 INFO L137 encePairwiseOnDemand]: 164/170 looper letters, 25 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-20 10:47:11,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 165 transitions, 435 flow [2022-11-20 10:47:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:47:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-20 10:47:11,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2022-11-20 10:47:11,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-20 10:47:11,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-20 10:47:11,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-20 10:47:11,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,632 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 344 flow. Second operand 3 states and 468 transitions. [2022-11-20 10:47:11,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 165 transitions, 435 flow [2022-11-20 10:47:11,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:47:11,639 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 384 flow [2022-11-20 10:47:11,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-11-20 10:47:11,643 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 3 predicate places. [2022-11-20 10:47:11,643 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 384 flow [2022-11-20 10:47:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:11,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:11,645 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:11,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:47:11,645 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:11,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 477260439, now seen corresponding path program 1 times [2022-11-20 10:47:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:11,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266961361] [2022-11-20 10:47:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:11,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266961361] [2022-11-20 10:47:11,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266961361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604301426] [2022-11-20 10:47:11,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:11,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:11,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:12,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:47:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:47:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:12,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604301426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:12,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:47:12,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:47:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982914585] [2022-11-20 10:47:12,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:47:12,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:47:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:47:12,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 170 [2022-11-20 10:47:12,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 157 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:12,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:12,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 170 [2022-11-20 10:47:12,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:13,369 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([460] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][178], [26#L1022-4true, 33#L1010true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 190#true, 86#L945-2true, 186#(<= 1 ~top~0), Black: 184#true, Black: 172#(= ~top~0 0)]) [2022-11-20 10:47:13,369 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-20 10:47:13,369 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-20 10:47:13,370 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-20 10:47:13,370 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-20 10:47:13,370 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([461] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][179], [154#L1008-1true, 26#L1022-4true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 86#L945-2true, 184#true, Black: 186#(<= 1 ~top~0), 222#(<= ~top~0 0), Black: 172#(= ~top~0 0)]) [2022-11-20 10:47:13,370 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-20 10:47:13,371 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-20 10:47:13,371 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-20 10:47:13,371 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-20 10:47:13,486 INFO L130 PetriNetUnfolder]: 387/2731 cut-off events. [2022-11-20 10:47:13,487 INFO L131 PetriNetUnfolder]: For 972/1058 co-relation queries the response was YES. [2022-11-20 10:47:13,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 2731 events. 387/2731 cut-off events. For 972/1058 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19218 event pairs, 64 based on Foata normal form. 38/2620 useless extension candidates. Maximal degree in co-relation 3635. Up to 300 conditions per place. [2022-11-20 10:47:13,512 INFO L137 encePairwiseOnDemand]: 161/170 looper letters, 86 selfloop transitions, 46 changer transitions 1/267 dead transitions. [2022-11-20 10:47:13,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 1066 flow [2022-11-20 10:47:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:47:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:47:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2723 transitions. [2022-11-20 10:47:13,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8898692810457516 [2022-11-20 10:47:13,520 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2723 transitions. [2022-11-20 10:47:13,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2723 transitions. [2022-11-20 10:47:13,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:13,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2723 transitions. [2022-11-20 10:47:13,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.27777777777777) internal successors, (2723), 18 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:13,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:13,538 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:13,539 INFO L175 Difference]: Start difference. First operand has 158 places, 157 transitions, 384 flow. Second operand 18 states and 2723 transitions. [2022-11-20 10:47:13,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 1066 flow [2022-11-20 10:47:13,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 267 transitions, 1004 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-20 10:47:13,549 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 755 flow [2022-11-20 10:47:13,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=755, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2022-11-20 10:47:13,550 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 24 predicate places. [2022-11-20 10:47:13,551 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 755 flow [2022-11-20 10:47:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:13,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:13,552 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:13,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:13,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:13,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1349207881, now seen corresponding path program 1 times [2022-11-20 10:47:13,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:13,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419305907] [2022-11-20 10:47:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:13,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:13,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419305907] [2022-11-20 10:47:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419305907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:13,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:13,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904129903] [2022-11-20 10:47:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:13,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:47:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:47:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:47:13,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 170 [2022-11-20 10:47:13,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 755 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:13,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:13,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 170 [2022-11-20 10:47:13,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:14,198 INFO L130 PetriNetUnfolder]: 54/1105 cut-off events. [2022-11-20 10:47:14,198 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-20 10:47:14,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1105 events. 54/1105 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4850 event pairs, 9 based on Foata normal form. 18/1080 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-20 10:47:14,206 INFO L137 encePairwiseOnDemand]: 166/170 looper letters, 12 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-20 10:47:14,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 532 flow [2022-11-20 10:47:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:47:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:47:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-20 10:47:14,209 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9058823529411765 [2022-11-20 10:47:14,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-20 10:47:14,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-20 10:47:14,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:14,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-20 10:47:14,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:14,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:14,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:14,213 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 755 flow. Second operand 3 states and 462 transitions. [2022-11-20 10:47:14,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 532 flow [2022-11-20 10:47:14,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 171 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-20 10:47:14,220 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 479 flow [2022-11-20 10:47:14,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2022-11-20 10:47:14,222 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 14 predicate places. [2022-11-20 10:47:14,222 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 479 flow [2022-11-20 10:47:14,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:14,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:14,223 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:14,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:47:14,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1885154879, now seen corresponding path program 1 times [2022-11-20 10:47:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094305583] [2022-11-20 10:47:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:16,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:16,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094305583] [2022-11-20 10:47:16,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094305583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:16,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:16,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-20 10:47:16,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239181979] [2022-11-20 10:47:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:47:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:47:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:47:16,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 10:47:16,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 479 flow. Second operand has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:16,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:16,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 10:47:16,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:19,435 INFO L130 PetriNetUnfolder]: 1109/4445 cut-off events. [2022-11-20 10:47:19,435 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-20 10:47:19,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 4445 events. 1109/4445 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33497 event pairs, 163 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 4747. Up to 1468 conditions per place. [2022-11-20 10:47:19,470 INFO L137 encePairwiseOnDemand]: 136/170 looper letters, 254 selfloop transitions, 42 changer transitions 2/382 dead transitions. [2022-11-20 10:47:19,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 382 transitions, 1684 flow [2022-11-20 10:47:19,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 10:47:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 10:47:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3209 transitions. [2022-11-20 10:47:19,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6089184060721062 [2022-11-20 10:47:19,479 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3209 transitions. [2022-11-20 10:47:19,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3209 transitions. [2022-11-20 10:47:19,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:19,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3209 transitions. [2022-11-20 10:47:19,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 103.51612903225806) internal successors, (3209), 31 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:19,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:19,555 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:19,555 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 479 flow. Second operand 31 states and 3209 transitions. [2022-11-20 10:47:19,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 382 transitions, 1684 flow [2022-11-20 10:47:19,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 382 transitions, 1680 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:47:19,565 INFO L231 Difference]: Finished difference. Result has 225 places, 207 transitions, 793 flow [2022-11-20 10:47:19,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=793, PETRI_PLACES=225, PETRI_TRANSITIONS=207} [2022-11-20 10:47:19,567 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 70 predicate places. [2022-11-20 10:47:19,567 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 207 transitions, 793 flow [2022-11-20 10:47:19,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:19,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:19,569 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:19,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:47:19,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:19,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash -498230787, now seen corresponding path program 2 times [2022-11-20 10:47:19,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:19,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046040770] [2022-11-20 10:47:19,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:22,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046040770] [2022-11-20 10:47:22,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046040770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:22,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:22,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 10:47:22,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424760770] [2022-11-20 10:47:22,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:47:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:47:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:47:22,016 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 10:47:22,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 207 transitions, 793 flow. Second operand has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:22,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:22,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 10:47:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:26,594 INFO L130 PetriNetUnfolder]: 1488/5983 cut-off events. [2022-11-20 10:47:26,594 INFO L131 PetriNetUnfolder]: For 2945/2947 co-relation queries the response was YES. [2022-11-20 10:47:26,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13027 conditions, 5983 events. 1488/5983 cut-off events. For 2945/2947 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 49013 event pairs, 314 based on Foata normal form. 4/5867 useless extension candidates. Maximal degree in co-relation 7835. Up to 1503 conditions per place. [2022-11-20 10:47:26,673 INFO L137 encePairwiseOnDemand]: 134/170 looper letters, 259 selfloop transitions, 60 changer transitions 2/397 dead transitions. [2022-11-20 10:47:26,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 2185 flow [2022-11-20 10:47:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 10:47:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 10:47:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2918 transitions. [2022-11-20 10:47:26,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5363970588235294 [2022-11-20 10:47:26,685 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2918 transitions. [2022-11-20 10:47:26,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2918 transitions. [2022-11-20 10:47:26,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:26,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2918 transitions. [2022-11-20 10:47:26,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.1875) internal successors, (2918), 32 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:26,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:26,713 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:26,714 INFO L175 Difference]: Start difference. First operand has 225 places, 207 transitions, 793 flow. Second operand 32 states and 2918 transitions. [2022-11-20 10:47:26,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 2185 flow [2022-11-20 10:47:26,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 397 transitions, 2181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 10:47:26,738 INFO L231 Difference]: Finished difference. Result has 269 places, 226 transitions, 1111 flow [2022-11-20 10:47:26,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1111, PETRI_PLACES=269, PETRI_TRANSITIONS=226} [2022-11-20 10:47:26,740 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 114 predicate places. [2022-11-20 10:47:26,740 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 226 transitions, 1111 flow [2022-11-20 10:47:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:26,742 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:26,742 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:47:26,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:26,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 77169637, now seen corresponding path program 3 times [2022-11-20 10:47:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:26,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66296779] [2022-11-20 10:47:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:26,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66296779] [2022-11-20 10:47:29,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66296779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:29,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:29,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-20 10:47:29,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057889818] [2022-11-20 10:47:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:29,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:47:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:47:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:47:29,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2022-11-20 10:47:29,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 226 transitions, 1111 flow. Second operand has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:29,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:29,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2022-11-20 10:47:29,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:34,486 INFO L130 PetriNetUnfolder]: 1792/7572 cut-off events. [2022-11-20 10:47:34,487 INFO L131 PetriNetUnfolder]: For 5108/5111 co-relation queries the response was YES. [2022-11-20 10:47:34,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17104 conditions, 7572 events. 1792/7572 cut-off events. For 5108/5111 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 66507 event pairs, 273 based on Foata normal form. 8/7429 useless extension candidates. Maximal degree in co-relation 9319. Up to 1276 conditions per place. [2022-11-20 10:47:34,557 INFO L137 encePairwiseOnDemand]: 144/170 looper letters, 233 selfloop transitions, 53 changer transitions 14/388 dead transitions. [2022-11-20 10:47:34,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 388 transitions, 2442 flow [2022-11-20 10:47:34,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:47:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 10:47:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2429 transitions. [2022-11-20 10:47:34,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5715294117647058 [2022-11-20 10:47:34,564 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2429 transitions. [2022-11-20 10:47:34,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2429 transitions. [2022-11-20 10:47:34,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:34,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2429 transitions. [2022-11-20 10:47:34,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 97.16) internal successors, (2429), 25 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:34,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:34,582 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:34,583 INFO L175 Difference]: Start difference. First operand has 269 places, 226 transitions, 1111 flow. Second operand 25 states and 2429 transitions. [2022-11-20 10:47:34,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 388 transitions, 2442 flow [2022-11-20 10:47:34,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 2350 flow, removed 27 selfloop flow, removed 14 redundant places. [2022-11-20 10:47:34,612 INFO L231 Difference]: Finished difference. Result has 287 places, 238 transitions, 1315 flow [2022-11-20 10:47:34,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1315, PETRI_PLACES=287, PETRI_TRANSITIONS=238} [2022-11-20 10:47:34,614 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 132 predicate places. [2022-11-20 10:47:34,614 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 238 transitions, 1315 flow [2022-11-20 10:47:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:34,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:34,616 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:47:34,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2016832061, now seen corresponding path program 1 times [2022-11-20 10:47:34,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:34,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180780190] [2022-11-20 10:47:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180780190] [2022-11-20 10:47:34,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180780190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:34,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684968275] [2022-11-20 10:47:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:34,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:34,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:34,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:47:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:47:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:47:35,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:47:35,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684968275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:35,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:47:35,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-20 10:47:35,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608661299] [2022-11-20 10:47:35,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:35,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:47:35,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:47:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:47:35,347 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-20 10:47:35,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 238 transitions, 1315 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:35,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:35,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-20 10:47:35,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:36,288 INFO L130 PetriNetUnfolder]: 247/3293 cut-off events. [2022-11-20 10:47:36,288 INFO L131 PetriNetUnfolder]: For 2623/2625 co-relation queries the response was YES. [2022-11-20 10:47:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6533 conditions, 3293 events. 247/3293 cut-off events. For 2623/2625 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 23842 event pairs, 67 based on Foata normal form. 13/3233 useless extension candidates. Maximal degree in co-relation 4741. Up to 261 conditions per place. [2022-11-20 10:47:36,326 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 50 selfloop transitions, 30 changer transitions 0/260 dead transitions. [2022-11-20 10:47:36,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 260 transitions, 1522 flow [2022-11-20 10:47:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:47:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:47:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1186 transitions. [2022-11-20 10:47:36,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8720588235294118 [2022-11-20 10:47:36,330 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1186 transitions. [2022-11-20 10:47:36,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1186 transitions. [2022-11-20 10:47:36,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:36,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1186 transitions. [2022-11-20 10:47:36,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.25) internal successors, (1186), 8 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:36,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:36,408 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:36,408 INFO L175 Difference]: Start difference. First operand has 287 places, 238 transitions, 1315 flow. Second operand 8 states and 1186 transitions. [2022-11-20 10:47:36,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 260 transitions, 1522 flow [2022-11-20 10:47:36,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 260 transitions, 1448 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-11-20 10:47:36,434 INFO L231 Difference]: Finished difference. Result has 285 places, 241 transitions, 1351 flow [2022-11-20 10:47:36,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=285, PETRI_TRANSITIONS=241} [2022-11-20 10:47:36,435 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 130 predicate places. [2022-11-20 10:47:36,436 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 241 transitions, 1351 flow [2022-11-20 10:47:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:36,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:36,437 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:36,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 10:47:36,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:36,642 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:36,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1911220724, now seen corresponding path program 1 times [2022-11-20 10:47:36,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:36,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875257190] [2022-11-20 10:47:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:47:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:38,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875257190] [2022-11-20 10:47:38,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875257190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:38,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80921138] [2022-11-20 10:47:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:38,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:38,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:38,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:47:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:38,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 10:47:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:39,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 10:47:41,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-20 10:47:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:47:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:42,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-20 10:47:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:47:43,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80921138] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:43,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:47:43,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-20 10:47:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976427872] [2022-11-20 10:47:43,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:47:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:47:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 10:47:43,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 10:47:43,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 241 transitions, 1351 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:43,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:47:43,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 10:47:43,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:47:53,498 INFO L130 PetriNetUnfolder]: 2639/10837 cut-off events. [2022-11-20 10:47:53,499 INFO L131 PetriNetUnfolder]: For 9116/9116 co-relation queries the response was YES. [2022-11-20 10:47:53,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 10837 events. 2639/10837 cut-off events. For 9116/9116 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 100656 event pairs, 407 based on Foata normal form. 12/10624 useless extension candidates. Maximal degree in co-relation 22474. Up to 1446 conditions per place. [2022-11-20 10:47:53,629 INFO L137 encePairwiseOnDemand]: 135/170 looper letters, 276 selfloop transitions, 184 changer transitions 3/547 dead transitions. [2022-11-20 10:47:53,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 547 transitions, 3746 flow [2022-11-20 10:47:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 10:47:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-20 10:47:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6595 transitions. [2022-11-20 10:47:53,646 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5877896613190731 [2022-11-20 10:47:53,646 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6595 transitions. [2022-11-20 10:47:53,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6595 transitions. [2022-11-20 10:47:53,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:47:53,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6595 transitions. [2022-11-20 10:47:53,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 99.92424242424242) internal successors, (6595), 66 states have internal predecessors, (6595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:53,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:53,691 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:53,691 INFO L175 Difference]: Start difference. First operand has 285 places, 241 transitions, 1351 flow. Second operand 66 states and 6595 transitions. [2022-11-20 10:47:53,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 547 transitions, 3746 flow [2022-11-20 10:47:53,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 547 transitions, 3686 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-20 10:47:53,751 INFO L231 Difference]: Finished difference. Result has 367 places, 366 transitions, 2722 flow [2022-11-20 10:47:53,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2722, PETRI_PLACES=367, PETRI_TRANSITIONS=366} [2022-11-20 10:47:53,752 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 212 predicate places. [2022-11-20 10:47:53,752 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 366 transitions, 2722 flow [2022-11-20 10:47:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:47:53,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:47:53,754 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:53,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:53,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:53,960 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:47:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash -242106828, now seen corresponding path program 2 times [2022-11-20 10:47:53,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082226415] [2022-11-20 10:47:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:53,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:47:56,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082226415] [2022-11-20 10:47:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082226415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:56,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545164882] [2022-11-20 10:47:56,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:47:56,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:56,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:56,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:47:56,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:47:56,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:47:56,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 10:47:56,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:56,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 10:47:56,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 10:47:56,318 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:47:56,319 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 [2022-11-20 10:47:57,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 10:47:57,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 10:47:58,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-20 10:47:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:47:58,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:59,718 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_303) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-20 10:47:59,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:47:59,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:47:59,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:47:59,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 10:47:59,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 10:48:01,031 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 10:48:01,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 10:48:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:48:01,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545164882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:01,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:48:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-11-20 10:48:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122193408] [2022-11-20 10:48:01,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:01,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-20 10:48:01,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:01,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-20 10:48:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4846, Unknown=1, NotChecked=140, Total=5256 [2022-11-20 10:48:01,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 10:48:01,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 366 transitions, 2722 flow. Second operand has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:01,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:48:01,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 10:48:01,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:48:29,547 INFO L130 PetriNetUnfolder]: 3128/12626 cut-off events. [2022-11-20 10:48:29,547 INFO L131 PetriNetUnfolder]: For 13468/13475 co-relation queries the response was YES. [2022-11-20 10:48:29,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32404 conditions, 12626 events. 3128/12626 cut-off events. For 13468/13475 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 122261 event pairs, 155 based on Foata normal form. 8/12385 useless extension candidates. Maximal degree in co-relation 29594. Up to 1715 conditions per place. [2022-11-20 10:48:29,722 INFO L137 encePairwiseOnDemand]: 132/170 looper letters, 277 selfloop transitions, 264 changer transitions 3/620 dead transitions. [2022-11-20 10:48:29,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 620 transitions, 4944 flow [2022-11-20 10:48:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 10:48:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-20 10:48:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6391 transitions. [2022-11-20 10:48:29,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5149879129734085 [2022-11-20 10:48:29,733 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6391 transitions. [2022-11-20 10:48:29,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6391 transitions. [2022-11-20 10:48:29,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:48:29,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6391 transitions. [2022-11-20 10:48:29,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 87.54794520547945) internal successors, (6391), 73 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:29,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:29,769 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:29,769 INFO L175 Difference]: Start difference. First operand has 367 places, 366 transitions, 2722 flow. Second operand 73 states and 6391 transitions. [2022-11-20 10:48:29,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 620 transitions, 4944 flow [2022-11-20 10:48:29,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 620 transitions, 4568 flow, removed 161 selfloop flow, removed 11 redundant places. [2022-11-20 10:48:29,947 INFO L231 Difference]: Finished difference. Result has 443 places, 441 transitions, 3658 flow [2022-11-20 10:48:29,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=3658, PETRI_PLACES=443, PETRI_TRANSITIONS=441} [2022-11-20 10:48:29,948 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 288 predicate places. [2022-11-20 10:48:29,948 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 441 transitions, 3658 flow [2022-11-20 10:48:29,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:29,950 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:48:29,951 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:29,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:30,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:30,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:48:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash -24835102, now seen corresponding path program 2 times [2022-11-20 10:48:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:30,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134583372] [2022-11-20 10:48:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:30,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 10:48:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:30,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134583372] [2022-11-20 10:48:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134583372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:30,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801154562] [2022-11-20 10:48:30,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:48:30,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:30,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:30,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:30,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:48:30,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:48:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:48:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:48:30,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 10:48:30,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 10:48:31,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801154562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:31,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:48:31,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-20 10:48:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120259602] [2022-11-20 10:48:31,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:48:31,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:31,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:48:31,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:48:31,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-20 10:48:31,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 441 transitions, 3658 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:31,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:48:31,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-20 10:48:31,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:48:33,548 INFO L130 PetriNetUnfolder]: 557/6447 cut-off events. [2022-11-20 10:48:33,548 INFO L131 PetriNetUnfolder]: For 9869/9871 co-relation queries the response was YES. [2022-11-20 10:48:33,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16277 conditions, 6447 events. 557/6447 cut-off events. For 9869/9871 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 54531 event pairs, 130 based on Foata normal form. 20/6315 useless extension candidates. Maximal degree in co-relation 14907. Up to 238 conditions per place. [2022-11-20 10:48:33,619 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 94 selfloop transitions, 139 changer transitions 1/534 dead transitions. [2022-11-20 10:48:33,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 534 transitions, 4810 flow [2022-11-20 10:48:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 10:48:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 10:48:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3214 transitions. [2022-11-20 10:48:33,625 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8593582887700535 [2022-11-20 10:48:33,625 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3214 transitions. [2022-11-20 10:48:33,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3214 transitions. [2022-11-20 10:48:33,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:48:33,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3214 transitions. [2022-11-20 10:48:33,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.0909090909091) internal successors, (3214), 22 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:33,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:33,736 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:33,736 INFO L175 Difference]: Start difference. First operand has 443 places, 441 transitions, 3658 flow. Second operand 22 states and 3214 transitions. [2022-11-20 10:48:33,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 534 transitions, 4810 flow [2022-11-20 10:48:33,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 534 transitions, 4471 flow, removed 76 selfloop flow, removed 21 redundant places. [2022-11-20 10:48:33,859 INFO L231 Difference]: Finished difference. Result has 448 places, 473 transitions, 4073 flow [2022-11-20 10:48:33,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4073, PETRI_PLACES=448, PETRI_TRANSITIONS=473} [2022-11-20 10:48:33,861 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 293 predicate places. [2022-11-20 10:48:33,862 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 473 transitions, 4073 flow [2022-11-20 10:48:33,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:33,863 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:48:33,863 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:33,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:34,075 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:48:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1872800119, now seen corresponding path program 1 times [2022-11-20 10:48:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:34,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594979194] [2022-11-20 10:48:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:48:37,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594979194] [2022-11-20 10:48:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594979194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280976182] [2022-11-20 10:48:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:37,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:37,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:37,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:48:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 10:48:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:38,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 10:48:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:48:40,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-20 10:48:43,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-20 10:48:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:48:43,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:48,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-20 10:48:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:48:49,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280976182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:49,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:48:49,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 32] total 96 [2022-11-20 10:48:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304009984] [2022-11-20 10:48:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:49,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 10:48:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:49,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 10:48:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=8369, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 10:48:49,966 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-20 10:48:49,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 473 transitions, 4073 flow. Second operand has 96 states, 96 states have (on average 98.02083333333333) internal successors, (9410), 96 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:48:49,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:48:49,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-20 10:48:49,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:50:49,912 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:51:09,994 INFO L130 PetriNetUnfolder]: 7629/31404 cut-off events. [2022-11-20 10:51:09,994 INFO L131 PetriNetUnfolder]: For 47502/47509 co-relation queries the response was YES. [2022-11-20 10:51:10,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86488 conditions, 31404 events. 7629/31404 cut-off events. For 47502/47509 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 333547 event pairs, 1209 based on Foata normal form. 87/30896 useless extension candidates. Maximal degree in co-relation 77374. Up to 5591 conditions per place. [2022-11-20 10:51:10,715 INFO L137 encePairwiseOnDemand]: 127/170 looper letters, 1449 selfloop transitions, 851 changer transitions 256/2640 dead transitions. [2022-11-20 10:51:10,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 2640 transitions, 22592 flow [2022-11-20 10:51:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2022-11-20 10:51:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2022-11-20 10:51:10,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 35085 transitions. [2022-11-20 10:51:10,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5863135026737968 [2022-11-20 10:51:10,767 INFO L72 ComplementDD]: Start complementDD. Operand 352 states and 35085 transitions. [2022-11-20 10:51:10,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 352 states and 35085 transitions. [2022-11-20 10:51:10,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:51:10,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 352 states and 35085 transitions. [2022-11-20 10:51:10,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 353 states, 352 states have (on average 99.67329545454545) internal successors, (35085), 352 states have internal predecessors, (35085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:10,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 353 states, 353 states have (on average 170.0) internal successors, (60010), 353 states have internal predecessors, (60010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:10,934 INFO L81 ComplementDD]: Finished complementDD. Result has 353 states, 353 states have (on average 170.0) internal successors, (60010), 353 states have internal predecessors, (60010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:10,934 INFO L175 Difference]: Start difference. First operand has 448 places, 473 transitions, 4073 flow. Second operand 352 states and 35085 transitions. [2022-11-20 10:51:10,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 2640 transitions, 22592 flow [2022-11-20 10:51:11,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 792 places, 2640 transitions, 21892 flow, removed 222 selfloop flow, removed 7 redundant places. [2022-11-20 10:51:11,445 INFO L231 Difference]: Finished difference. Result has 929 places, 1362 transitions, 14896 flow [2022-11-20 10:51:11,447 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=352, PETRI_FLOW=14896, PETRI_PLACES=929, PETRI_TRANSITIONS=1362} [2022-11-20 10:51:11,449 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 774 predicate places. [2022-11-20 10:51:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 1362 transitions, 14896 flow [2022-11-20 10:51:11,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 98.02083333333333) internal successors, (9410), 96 states have internal predecessors, (9410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:11,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:51:11,452 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:11,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:11,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:51:11,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:51:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:11,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1553630691, now seen corresponding path program 2 times [2022-11-20 10:51:11,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:11,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742781025] [2022-11-20 10:51:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:11,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:15,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742781025] [2022-11-20 10:51:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742781025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543216245] [2022-11-20 10:51:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:15,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:15,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:51:15,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:15,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 10:51:15,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:15,912 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 10:51:15,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 10:51:15,937 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:51:15,937 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 [2022-11-20 10:51:17,068 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 13 treesize of output 9 [2022-11-20 10:51:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-20 10:51:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:51:18,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 10:51:19,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 10:51:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:20,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:23,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:23,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 10:51:23,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:51:23,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-20 10:51:23,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 10:51:25,114 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 10:51:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 10:51:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543216245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:25,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:25,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35, 34] total 97 [2022-11-20 10:51:25,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191980021] [2022-11-20 10:51:25,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:25,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 10:51:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 10:51:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=8627, Unknown=3, NotChecked=0, Total=9312 [2022-11-20 10:51:25,193 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 10:51:25,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 929 places, 1362 transitions, 14896 flow. Second operand has 97 states, 97 states have (on average 86.01030927835052) internal successors, (8343), 97 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:51:25,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 10:51:25,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:53:09,167 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 99 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:53:31,835 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 111 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:54:07,074 INFO L130 PetriNetUnfolder]: 14467/60122 cut-off events. [2022-11-20 10:54:07,074 INFO L131 PetriNetUnfolder]: For 734956/734993 co-relation queries the response was YES. [2022-11-20 10:54:09,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301863 conditions, 60122 events. 14467/60122 cut-off events. For 734956/734993 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 705032 event pairs, 3253 based on Foata normal form. 242/59299 useless extension candidates. Maximal degree in co-relation 301545. Up to 15215 conditions per place. [2022-11-20 10:54:10,033 INFO L137 encePairwiseOnDemand]: 121/170 looper letters, 2624 selfloop transitions, 1247 changer transitions 271/4218 dead transitions. [2022-11-20 10:54:10,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1173 places, 4218 transitions, 56770 flow [2022-11-20 10:54:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-11-20 10:54:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2022-11-20 10:54:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 24251 transitions. [2022-11-20 10:54:10,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5187379679144385 [2022-11-20 10:54:10,067 INFO L72 ComplementDD]: Start complementDD. Operand 275 states and 24251 transitions. [2022-11-20 10:54:10,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 275 states and 24251 transitions. [2022-11-20 10:54:10,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:54:10,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 275 states and 24251 transitions. [2022-11-20 10:54:10,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 276 states, 275 states have (on average 88.18545454545455) internal successors, (24251), 275 states have internal predecessors, (24251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:10,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 276 states, 276 states have (on average 170.0) internal successors, (46920), 276 states have internal predecessors, (46920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:10,173 INFO L81 ComplementDD]: Finished complementDD. Result has 276 states, 276 states have (on average 170.0) internal successors, (46920), 276 states have internal predecessors, (46920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:10,173 INFO L175 Difference]: Start difference. First operand has 929 places, 1362 transitions, 14896 flow. Second operand 275 states and 24251 transitions. [2022-11-20 10:54:10,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1173 places, 4218 transitions, 56770 flow [2022-11-20 10:54:15,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1139 places, 4218 transitions, 54188 flow, removed 1211 selfloop flow, removed 34 redundant places. [2022-11-20 10:54:15,937 INFO L231 Difference]: Finished difference. Result has 1300 places, 2465 transitions, 32437 flow [2022-11-20 10:54:15,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=13416, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=275, PETRI_FLOW=32437, PETRI_PLACES=1300, PETRI_TRANSITIONS=2465} [2022-11-20 10:54:15,939 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 1145 predicate places. [2022-11-20 10:54:15,939 INFO L495 AbstractCegarLoop]: Abstraction has has 1300 places, 2465 transitions, 32437 flow [2022-11-20 10:54:15,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 86.01030927835052) internal successors, (8343), 97 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:54:15,940 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:15,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:16,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:54:16,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 10:54:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -57449931, now seen corresponding path program 3 times [2022-11-20 10:54:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213563244] [2022-11-20 10:54:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:22,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213563244] [2022-11-20 10:54:22,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213563244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:22,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852633117] [2022-11-20 10:54:22,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:54:22,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:22,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:22,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:22,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9096901-f3a6-4607-9392-c70456717449/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:54:22,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:54:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:22,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 10:54:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:22,450 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 7 treesize of output 6 [2022-11-20 10:54:22,753 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 10:54:22,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 10:54:22,920 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 10:54:22,920 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 [2022-11-20 10:54:23,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-20 10:54:25,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-20 10:54:28,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-20 10:54:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-20 10:54:35,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-20 10:54:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:36,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:02,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-20 10:55:04,911 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 10:55:04,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-20 10:55:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:05,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852633117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:05,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:05,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 37] total 112 [2022-11-20 10:55:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848706319] [2022-11-20 10:55:05,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:05,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-20 10:55:05,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-20 10:55:05,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=11414, Unknown=62, NotChecked=0, Total=12432 [2022-11-20 10:55:05,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-20 10:55:05,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1300 places, 2465 transitions, 32437 flow. Second operand has 112 states, 112 states have (on average 85.75) internal successors, (9604), 112 states have internal predecessors, (9604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:05,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:55:05,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-20 10:55:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand