./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --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_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/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_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/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_8ae4e544-8192-41c6-a957-c1aa1a154384/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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- 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 11:35:06,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:35:06,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:35:06,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:35:06,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:35:06,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:35:06,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:35:06,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:35:06,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:35:06,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:35:06,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:35:06,612 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:35:06,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:35:06,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:35:06,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:35:06,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:35:06,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:35:06,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:35:06,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:35:06,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:35:06,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:35:06,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:35:06,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:35:06,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:35:06,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:35:06,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:35:06,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:35:06,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:35:06,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:35:06,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:35:06,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:35:06,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:35:06,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:35:06,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:35:06,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:35:06,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:35:06,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:35:06,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:35:06,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:35:06,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:35:06,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:35:06,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:35:06,692 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:35:06,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:35:06,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:35:06,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:35:06,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:35:06,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:35:06,694 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:35:06,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:35:06,694 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:35:06,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:35:06,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:35:06,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:35:06,696 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:35:06,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:35:06,696 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:35:06,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:35:06,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:35:06,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:35:06,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:35:06,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:35:06,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:35:06,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:35:06,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:35:06,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:35:06,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:35:06,698 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:35:06,698 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:35:06,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:35:06,698 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_8ae4e544-8192-41c6-a957-c1aa1a154384/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-11-20 11:35:06,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:35:06,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:35:06,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:35:06,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:35:06,970 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:35:06,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-20 11:35:10,144 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:35:10,378 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:35:10,378 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-20 11:35:10,388 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/data/5808a2a7f/31c261d7f7464dd4a5c24c4bdbb579b8/FLAG127efe782 [2022-11-20 11:35:10,406 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/data/5808a2a7f/31c261d7f7464dd4a5c24c4bdbb579b8 [2022-11-20 11:35:10,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:35:10,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:35:10,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:35:10,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:35:10,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:35:10,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a41a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10, skipping insertion in model container [2022-11-20 11:35:10,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:35:10,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:35:10,718 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_8ae4e544-8192-41c6-a957-c1aa1a154384/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-20 11:35:10,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:35:10,749 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:35:10,790 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_8ae4e544-8192-41c6-a957-c1aa1a154384/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-20 11:35:10,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:35:10,811 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:35:10,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10 WrapperNode [2022-11-20 11:35:10,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:35:10,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:35:10,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:35:10,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:35:10,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,880 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-11-20 11:35:10,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:35:10,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:35:10,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:35:10,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:35:10,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,931 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:35:10,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:35:10,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:35:10,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:35:10,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (1/1) ... [2022-11-20 11:35:10,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:35:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:10,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:35:11,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:35:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:35:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:35:11,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:35:11,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:35:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:35:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:35:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:35:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:35:11,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:35:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:35:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:35:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:35:11,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:35:11,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:35:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:35:11,039 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 11:35:11,208 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:35:11,210 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:35:11,557 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:35:11,778 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:35:11,778 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:35:11,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:11 BoogieIcfgContainer [2022-11-20 11:35:11,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:35:11,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:35:11,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:35:11,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:35:11,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:10" (1/3) ... [2022-11-20 11:35:11,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d6d002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:11, skipping insertion in model container [2022-11-20 11:35:11,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:10" (2/3) ... [2022-11-20 11:35:11,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d6d002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:11, skipping insertion in model container [2022-11-20 11:35:11,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:11" (3/3) ... [2022-11-20 11:35:11,801 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-11-20 11:35:11,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:35:11,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:35:11,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:35:11,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:35:11,919 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:35:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-11-20 11:35:12,076 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-11-20 11:35:12,077 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:35:12,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-11-20 11:35:12,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-11-20 11:35:12,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-11-20 11:35:12,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:35:12,134 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;@3792742e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:35:12,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:35:12,198 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2022-11-20 11:35:12,198 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:35:12,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:12,199 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] [2022-11-20 11:35:12,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 891903697, now seen corresponding path program 1 times [2022-11-20 11:35:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193249317] [2022-11-20 11:35:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:12,512 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 11:35:12,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193249317] [2022-11-20 11:35:12,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193249317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:12,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:12,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:35:12,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404315518] [2022-11-20 11:35:12,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:35:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:35:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:35:12,561 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-11-20 11:35:12,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 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 11:35:12,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:12,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-11-20 11:35:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:12,652 INFO L130 PetriNetUnfolder]: 12/147 cut-off events. [2022-11-20 11:35:12,652 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 11:35:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-11-20 11:35:12,654 INFO L137 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-11-20 11:35:12,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-11-20 11:35:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:35:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:35:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-11-20 11:35:12,672 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-11-20 11:35:12,673 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-11-20 11:35:12,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-11-20 11:35:12,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:12,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-11-20 11:35:12,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 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 11:35:12,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 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 11:35:12,685 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 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 11:35:12,686 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-11-20 11:35:12,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-11-20 11:35:12,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:35:12,694 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-11-20 11:35:12,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-11-20 11:35:12,699 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-11-20 11:35:12,699 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-11-20 11:35:12,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 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 11:35:12,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:12,700 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] [2022-11-20 11:35:12,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:35:12,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -469457169, now seen corresponding path program 1 times [2022-11-20 11:35:12,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:12,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756933322] [2022-11-20 11:35:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:12,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:13,152 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 11:35:13,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:13,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756933322] [2022-11-20 11:35:13,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756933322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:13,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:35:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203729669] [2022-11-20 11:35:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:13,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:35:13,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:13,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:35:13,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:35:13,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-11-20 11:35:13,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 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 11:35:13,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:13,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-11-20 11:35:13,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:13,361 INFO L130 PetriNetUnfolder]: 12/179 cut-off events. [2022-11-20 11:35:13,361 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:35:13,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 245 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-11-20 11:35:13,365 INFO L137 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-11-20 11:35:13,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-11-20 11:35:13,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:35:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 11:35:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-11-20 11:35:13,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-11-20 11:35:13,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-11-20 11:35:13,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-11-20 11:35:13,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:13,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-11-20 11:35:13,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 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 11:35:13,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 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 11:35:13,386 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 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 11:35:13,386 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-11-20 11:35:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-11-20 11:35:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:35:13,392 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-11-20 11:35:13,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-11-20 11:35:13,394 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-11-20 11:35:13,394 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-11-20 11:35:13,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 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 11:35:13,395 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:13,396 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 11:35:13,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:35:13,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:13,397 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-11-20 11:35:13,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:13,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738048477] [2022-11-20 11:35:13,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:35:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738048477] [2022-11-20 11:35:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738048477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:13,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:13,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:35:13,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889482553] [2022-11-20 11:35:13,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:13,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:35:13,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:35:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:35:13,786 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-11-20 11:35:13,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 11:35:13,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:13,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-11-20 11:35:13,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:13,850 INFO L130 PetriNetUnfolder]: 13/156 cut-off events. [2022-11-20 11:35:13,854 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:35:13,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-11-20 11:35:13,856 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-11-20 11:35:13,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-11-20 11:35:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:35:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:35:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-11-20 11:35:13,861 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-11-20 11:35:13,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-11-20 11:35:13,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-11-20 11:35:13,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:13,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-11-20 11:35:13,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 11:35:13,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 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 11:35:13,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 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 11:35:13,865 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-11-20 11:35:13,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-11-20 11:35:13,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:35:13,871 INFO L231 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-11-20 11:35:13,872 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-11-20 11:35:13,874 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-11-20 11:35:13,875 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-11-20 11:35:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 11:35:13,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:13,876 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 11:35:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:35:13,876 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2022-11-20 11:35:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644147862] [2022-11-20 11:35:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:35:14,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644147862] [2022-11-20 11:35:14,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644147862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:14,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:14,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:35:14,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965695732] [2022-11-20 11:35:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:14,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:35:14,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:14,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:35:14,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:35:14,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-11-20 11:35:14,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 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 11:35:14,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:14,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-11-20 11:35:14,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:14,794 INFO L130 PetriNetUnfolder]: 82/335 cut-off events. [2022-11-20 11:35:14,794 INFO L131 PetriNetUnfolder]: For 109/117 co-relation queries the response was YES. [2022-11-20 11:35:14,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 109/117 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1239 event pairs, 20 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-11-20 11:35:14,800 INFO L137 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-11-20 11:35:14,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-11-20 11:35:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:35:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-20 11:35:14,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-11-20 11:35:14,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-11-20 11:35:14,804 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-11-20 11:35:14,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-11-20 11:35:14,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:14,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-11-20 11:35:14,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 0 states have call successors, (0), 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 11:35:14,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 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 11:35:14,819 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 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 11:35:14,819 INFO L175 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-11-20 11:35:14,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-11-20 11:35:14,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-20 11:35:14,829 INFO L231 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-11-20 11:35:14,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-11-20 11:35:14,831 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-11-20 11:35:14,836 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-11-20 11:35:14,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 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 11:35:14,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:14,839 INFO L209 CegarLoopForPetriNet]: trace histogram [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 11:35:14,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:35:14,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:14,840 INFO L85 PathProgramCache]: Analyzing trace with hash 670984934, now seen corresponding path program 1 times [2022-11-20 11:35:14,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751439759] [2022-11-20 11:35:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:35:15,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:15,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751439759] [2022-11-20 11:35:15,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751439759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:35:15,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:35:15,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:35:15,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426400688] [2022-11-20 11:35:15,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:35:15,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:35:15,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:35:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:35:15,057 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-11-20 11:35:15,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 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 11:35:15,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:15,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-11-20 11:35:15,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:15,141 INFO L130 PetriNetUnfolder]: 26/272 cut-off events. [2022-11-20 11:35:15,141 INFO L131 PetriNetUnfolder]: For 81/96 co-relation queries the response was YES. [2022-11-20 11:35:15,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 272 events. 26/272 cut-off events. For 81/96 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 830 event pairs, 2 based on Foata normal form. 6/274 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-11-20 11:35:15,144 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-11-20 11:35:15,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-11-20 11:35:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:35:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:35:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-11-20 11:35:15,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-11-20 11:35:15,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-11-20 11:35:15,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-11-20 11:35:15,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:15,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-11-20 11:35:15,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 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 11:35:15,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 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 11:35:15,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 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 11:35:15,152 INFO L175 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-11-20 11:35:15,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-11-20 11:35:15,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-20 11:35:15,158 INFO L231 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-11-20 11:35:15,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-11-20 11:35:15,161 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-11-20 11:35:15,161 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-11-20 11:35:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 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 11:35:15,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:15,162 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] [2022-11-20 11:35:15,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:35:15,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:15,164 INFO L85 PathProgramCache]: Analyzing trace with hash -848582619, now seen corresponding path program 1 times [2022-11-20 11:35:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:15,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796108904] [2022-11-20 11:35:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:15,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796108904] [2022-11-20 11:35:15,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796108904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:15,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313882804] [2022-11-20 11:35:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:15,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:15,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:15,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:35:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:15,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:35:15,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:35:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:15,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:16,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313882804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:35:16,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:35:16,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:35:16,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231131222] [2022-11-20 11:35:16,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:35:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:35:16,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:35:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:35:16,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-20 11:35:16,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 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 11:35:16,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:16,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-20 11:35:16,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:16,456 INFO L130 PetriNetUnfolder]: 26/315 cut-off events. [2022-11-20 11:35:16,456 INFO L131 PetriNetUnfolder]: For 212/253 co-relation queries the response was YES. [2022-11-20 11:35:16,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/253 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2022-11-20 11:35:16,458 INFO L137 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-11-20 11:35:16,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-11-20 11:35:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:35:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-20 11:35:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-11-20 11:35:16,463 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-11-20 11:35:16,463 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-11-20 11:35:16,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-11-20 11:35:16,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:16,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-11-20 11:35:16,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 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 11:35:16,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:16,472 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:35:16,472 INFO L175 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-11-20 11:35:16,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-11-20 11:35:16,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-20 11:35:16,477 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-11-20 11:35:16,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-11-20 11:35:16,478 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-11-20 11:35:16,478 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-11-20 11:35:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 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 11:35:16,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:16,480 INFO L209 CegarLoopForPetriNet]: trace histogram [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 11:35:16,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:35:16,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:16,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1901575578, now seen corresponding path program 2 times [2022-11-20 11:35:16,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594518564] [2022-11-20 11:35:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:17,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594518564] [2022-11-20 11:35:17,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594518564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:17,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847159843] [2022-11-20 11:35:17,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:35:17,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:17,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:17,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:17,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:35:18,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:35:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:35:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:35:18,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:35:19,185 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-20 11:35:19,186 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 24 treesize of output 10 [2022-11-20 11:35:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:19,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:19,490 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 11:35:19,490 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 25 treesize of output 16 [2022-11-20 11:35:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847159843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:35:20,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:35:20,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-11-20 11:35:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149019096] [2022-11-20 11:35:20,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:35:20,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:35:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:35:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:35:20,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 136 [2022-11-20 11:35:20,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 41 states, 41 states have (on average 84.97560975609755) internal successors, (3484), 41 states have internal predecessors, (3484), 0 states have call successors, (0), 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 11:35:20,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:20,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 136 [2022-11-20 11:35:20,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:25,059 INFO L130 PetriNetUnfolder]: 779/2422 cut-off events. [2022-11-20 11:35:25,059 INFO L131 PetriNetUnfolder]: For 2446/2534 co-relation queries the response was YES. [2022-11-20 11:35:25,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 2422 events. 779/2422 cut-off events. For 2446/2534 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19064 event pairs, 32 based on Foata normal form. 36/2382 useless extension candidates. Maximal degree in co-relation 5691. Up to 411 conditions per place. [2022-11-20 11:35:25,088 INFO L137 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 129 changer transitions 0/384 dead transitions. [2022-11-20 11:35:25,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 384 transitions, 2131 flow [2022-11-20 11:35:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 11:35:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-20 11:35:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4214 transitions. [2022-11-20 11:35:25,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6455269607843137 [2022-11-20 11:35:25,099 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4214 transitions. [2022-11-20 11:35:25,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4214 transitions. [2022-11-20 11:35:25,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:25,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4214 transitions. [2022-11-20 11:35:25,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 87.79166666666667) internal successors, (4214), 48 states have internal predecessors, (4214), 0 states have call successors, (0), 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 11:35:25,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 136.0) internal successors, (6664), 49 states have internal predecessors, (6664), 0 states have call successors, (0), 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 11:35:25,126 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 136.0) internal successors, (6664), 49 states have internal predecessors, (6664), 0 states have call successors, (0), 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 11:35:25,127 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 48 states and 4214 transitions. [2022-11-20 11:35:25,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 384 transitions, 2131 flow [2022-11-20 11:35:25,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 384 transitions, 2048 flow, removed 37 selfloop flow, removed 6 redundant places. [2022-11-20 11:35:25,139 INFO L231 Difference]: Finished difference. Result has 212 places, 254 transitions, 1595 flow [2022-11-20 11:35:25,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1595, PETRI_PLACES=212, PETRI_TRANSITIONS=254} [2022-11-20 11:35:25,140 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 91 predicate places. [2022-11-20 11:35:25,141 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 254 transitions, 1595 flow [2022-11-20 11:35:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 84.97560975609755) internal successors, (3484), 41 states have internal predecessors, (3484), 0 states have call successors, (0), 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 11:35:25,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:25,143 INFO L209 CegarLoopForPetriNet]: trace histogram [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 11:35:25,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:35:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:25,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash 202496092, now seen corresponding path program 3 times [2022-11-20 11:35:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:25,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644457812] [2022-11-20 11:35:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:25,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:26,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644457812] [2022-11-20 11:35:26,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644457812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:26,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479820316] [2022-11-20 11:35:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:35:26,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:26,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:26,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:35:26,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:35:26,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:35:26,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:35:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:35:27,245 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 11:35:27,246 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 23 treesize of output 10 [2022-11-20 11:35:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:35:27,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:27,351 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 11:35:27,352 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 25 treesize of output 16 [2022-11-20 11:35:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:35:27,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479820316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:35:27,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:35:27,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 26 [2022-11-20 11:35:27,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324357535] [2022-11-20 11:35:27,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:35:27,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 11:35:27,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:27,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 11:35:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:35:27,628 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2022-11-20 11:35:27,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 254 transitions, 1595 flow. Second operand has 26 states, 26 states have (on average 68.23076923076923) internal successors, (1774), 26 states have internal predecessors, (1774), 0 states have call successors, (0), 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 11:35:27,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:27,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2022-11-20 11:35:27,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:29,689 INFO L130 PetriNetUnfolder]: 989/2821 cut-off events. [2022-11-20 11:35:29,689 INFO L131 PetriNetUnfolder]: For 15919/16223 co-relation queries the response was YES. [2022-11-20 11:35:29,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10239 conditions, 2821 events. 989/2821 cut-off events. For 15919/16223 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22802 event pairs, 145 based on Foata normal form. 75/2778 useless extension candidates. Maximal degree in co-relation 10196. Up to 1184 conditions per place. [2022-11-20 11:35:29,727 INFO L137 encePairwiseOnDemand]: 107/136 looper letters, 217 selfloop transitions, 117 changer transitions 0/389 dead transitions. [2022-11-20 11:35:29,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 389 transitions, 3282 flow [2022-11-20 11:35:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:35:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 11:35:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2203 transitions. [2022-11-20 11:35:29,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5062040441176471 [2022-11-20 11:35:29,734 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2203 transitions. [2022-11-20 11:35:29,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2203 transitions. [2022-11-20 11:35:29,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:29,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2203 transitions. [2022-11-20 11:35:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 68.84375) internal successors, (2203), 32 states have internal predecessors, (2203), 0 states have call successors, (0), 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 11:35:29,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 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 11:35:29,752 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 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 11:35:29,752 INFO L175 Difference]: Start difference. First operand has 212 places, 254 transitions, 1595 flow. Second operand 32 states and 2203 transitions. [2022-11-20 11:35:29,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 389 transitions, 3282 flow [2022-11-20 11:35:29,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 389 transitions, 2963 flow, removed 148 selfloop flow, removed 11 redundant places. [2022-11-20 11:35:29,839 INFO L231 Difference]: Finished difference. Result has 239 places, 314 transitions, 2383 flow [2022-11-20 11:35:29,840 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2383, PETRI_PLACES=239, PETRI_TRANSITIONS=314} [2022-11-20 11:35:29,843 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 118 predicate places. [2022-11-20 11:35:29,843 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 314 transitions, 2383 flow [2022-11-20 11:35:29,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.23076923076923) internal successors, (1774), 26 states have internal predecessors, (1774), 0 states have call successors, (0), 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 11:35:29,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:29,844 INFO L209 CegarLoopForPetriNet]: trace histogram [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 11:35:29,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:35:30,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:35:30,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1835410918, now seen corresponding path program 4 times [2022-11-20 11:35:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:30,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459429298] [2022-11-20 11:35:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:30,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:31,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459429298] [2022-11-20 11:35:31,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459429298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094749041] [2022-11-20 11:35:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:35:31,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:31,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:31,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:35:32,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:35:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:35:32,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:35:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:35:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:35:33,238 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 18 treesize of output 20 [2022-11-20 11:35:33,430 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 23 treesize of output 7 [2022-11-20 11:35:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:33,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:33,780 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 45 treesize of output 41 [2022-11-20 11:35:33,784 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 24 treesize of output 18 [2022-11-20 11:35:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:35,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094749041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:35:35,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:35:35,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 64 [2022-11-20 11:35:35,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094291448] [2022-11-20 11:35:35,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:35:35,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 11:35:35,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:35,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 11:35:35,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3732, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 11:35:35,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-11-20 11:35:35,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 314 transitions, 2383 flow. Second operand has 64 states, 64 states have (on average 50.09375) internal successors, (3206), 64 states have internal predecessors, (3206), 0 states have call successors, (0), 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 11:35:35,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:35,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-11-20 11:35:35,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:35:46,601 INFO L130 PetriNetUnfolder]: 5711/11880 cut-off events. [2022-11-20 11:35:46,601 INFO L131 PetriNetUnfolder]: For 103803/103894 co-relation queries the response was YES. [2022-11-20 11:35:46,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52353 conditions, 11880 events. 5711/11880 cut-off events. For 103803/103894 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 108439 event pairs, 183 based on Foata normal form. 262/12099 useless extension candidates. Maximal degree in co-relation 52303. Up to 1970 conditions per place. [2022-11-20 11:35:46,799 INFO L137 encePairwiseOnDemand]: 105/136 looper letters, 580 selfloop transitions, 536 changer transitions 0/1156 dead transitions. [2022-11-20 11:35:46,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1156 transitions, 12007 flow [2022-11-20 11:35:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 11:35:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-20 11:35:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3532 transitions. [2022-11-20 11:35:46,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3995475113122172 [2022-11-20 11:35:46,815 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3532 transitions. [2022-11-20 11:35:46,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3532 transitions. [2022-11-20 11:35:46,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:35:46,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3532 transitions. [2022-11-20 11:35:46,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.33846153846154) internal successors, (3532), 65 states have internal predecessors, (3532), 0 states have call successors, (0), 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 11:35:46,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 136.0) internal successors, (8976), 66 states have internal predecessors, (8976), 0 states have call successors, (0), 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 11:35:46,862 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 136.0) internal successors, (8976), 66 states have internal predecessors, (8976), 0 states have call successors, (0), 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 11:35:46,862 INFO L175 Difference]: Start difference. First operand has 239 places, 314 transitions, 2383 flow. Second operand 65 states and 3532 transitions. [2022-11-20 11:35:46,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1156 transitions, 12007 flow [2022-11-20 11:35:47,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1156 transitions, 11692 flow, removed 134 selfloop flow, removed 21 redundant places. [2022-11-20 11:35:47,573 INFO L231 Difference]: Finished difference. Result has 301 places, 772 transitions, 9371 flow [2022-11-20 11:35:47,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=9371, PETRI_PLACES=301, PETRI_TRANSITIONS=772} [2022-11-20 11:35:47,574 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 180 predicate places. [2022-11-20 11:35:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 772 transitions, 9371 flow [2022-11-20 11:35:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 50.09375) internal successors, (3206), 64 states have internal predecessors, (3206), 0 states have call successors, (0), 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 11:35:47,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:35:47,576 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:35:47,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:35:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:47,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:35:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:35:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 793717702, now seen corresponding path program 1 times [2022-11-20 11:35:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:35:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968439988] [2022-11-20 11:35:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:47,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:35:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:49,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:35:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968439988] [2022-11-20 11:35:49,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968439988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:49,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047437462] [2022-11-20 11:35:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:35:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:49,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:35:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:35:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 11:35:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:35:49,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:35:50,448 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:35:50,448 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 11:35:50,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:35:50,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 11:35:51,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:35:51,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:35:52,373 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 25 treesize of output 7 [2022-11-20 11:35:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:52,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:55,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:55,841 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 2 case distinctions, treesize of input 78 treesize of output 63 [2022-11-20 11:35:55,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:55,853 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 316 treesize of output 296 [2022-11-20 11:35:55,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:55,882 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 284 treesize of output 248 [2022-11-20 11:35:55,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:55,896 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 236 treesize of output 224 [2022-11-20 11:35:56,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:35:56,201 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 2 case distinctions, treesize of input 78 treesize of output 63 [2022-11-20 11:35:56,213 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 11:35:56,213 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 148 treesize of output 136 [2022-11-20 11:35:56,225 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 11:35:56,226 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 132 treesize of output 112 [2022-11-20 11:35:56,240 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 11:35:56,240 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 83 treesize of output 75 [2022-11-20 11:35:57,518 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 10 treesize of output 8 [2022-11-20 11:35:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:35:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047437462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:35:57,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:35:57,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 86 [2022-11-20 11:35:57,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082924588] [2022-11-20 11:35:57,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:35:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 11:35:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:35:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 11:35:57,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=6350, Unknown=49, NotChecked=0, Total=7310 [2022-11-20 11:35:57,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-11-20 11:35:57,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 772 transitions, 9371 flow. Second operand has 86 states, 86 states have (on average 47.406976744186046) internal successors, (4077), 86 states have internal predecessors, (4077), 0 states have call successors, (0), 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 11:35:57,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:35:57,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-11-20 11:35:57,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:02,011 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (* c_~q_front~0 4)) (.cse18 (* 4 c_~q_back~0))) (let ((.cse1 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse8 (and (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (+ c_~s~0 (select .cse21 .cse2)) 2) (not (= (select .cse21 .cse1) 1))))) (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse22 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse22 .cse1) 1)) (< 0 (+ c_~s~0 (select .cse22 .cse2)))))))) (.cse10 (+ c_~q~0.offset .cse18)) (.cse11 (+ .cse17 c_~q~0.offset)) (.cse6 (< c_~n~0 (+ 2 c_~q_back~0))) (.cse7 (< c_~q_back~0 0))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18|) 0)) (not (< |v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18| |c_#StackHeapBarrier|)))) (and (< c_~s~0 1) (< 0 (+ c_~s~0 1)))) (or (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_197 Int) (v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_197)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse0 .cse1) 1)) (< (+ c_~s~0 (select .cse0 .cse2)) 2)))) (forall ((v_ArrVal_197 Int) (v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse5 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_197)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse5 .cse1) 1)) (< 0 (+ c_~s~0 (select .cse5 .cse2)))))))) .cse6 .cse7 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (or .cse6 .cse7 .cse8) (or .cse6 .cse7 (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse9 .cse10) 1)) (<= (+ c_~s~0 (select .cse9 .cse11)) c_~N~0)))) (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse12 .cse10) 1)) (<= c_~N~0 (+ c_~s~0 (select .cse12 .cse11)))))))) (or .cse6 .cse7 (let ((.cse15 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (.cse14 (+ .cse17 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) (and (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (< 0 (+ c_~s~0 (select .cse13 .cse14))) (not (= (select .cse13 .cse15) 1))))) (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (not (= (select .cse16 .cse15) 1)) (< (+ c_~s~0 (select .cse16 .cse14)) 2))))))) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post19#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse6 .cse7 .cse8) (or (and (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse19 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse19 .cse10) 1)) (< (+ c_~s~0 (select .cse19 .cse11)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))))) (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse20 .cse10) 1)) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse20 .cse11))))))) .cse6 .cse7))))) is different from false [2022-11-20 11:36:14,593 INFO L130 PetriNetUnfolder]: 9992/19974 cut-off events. [2022-11-20 11:36:14,593 INFO L131 PetriNetUnfolder]: For 254347/254460 co-relation queries the response was YES. [2022-11-20 11:36:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106644 conditions, 19974 events. 9992/19974 cut-off events. For 254347/254460 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 190287 event pairs, 983 based on Foata normal form. 76/19979 useless extension candidates. Maximal degree in co-relation 106575. Up to 6620 conditions per place. [2022-11-20 11:36:14,917 INFO L137 encePairwiseOnDemand]: 96/136 looper letters, 1098 selfloop transitions, 752 changer transitions 56/1945 dead transitions. [2022-11-20 11:36:14,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1945 transitions, 26466 flow [2022-11-20 11:36:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 11:36:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-20 11:36:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5030 transitions. [2022-11-20 11:36:14,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37358882947118244 [2022-11-20 11:36:14,927 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5030 transitions. [2022-11-20 11:36:14,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5030 transitions. [2022-11-20 11:36:14,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:14,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5030 transitions. [2022-11-20 11:36:14,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 50.80808080808081) internal successors, (5030), 99 states have internal predecessors, (5030), 0 states have call successors, (0), 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 11:36:14,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 136.0) internal successors, (13600), 100 states have internal predecessors, (13600), 0 states have call successors, (0), 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 11:36:14,965 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 136.0) internal successors, (13600), 100 states have internal predecessors, (13600), 0 states have call successors, (0), 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 11:36:14,965 INFO L175 Difference]: Start difference. First operand has 301 places, 772 transitions, 9371 flow. Second operand 99 states and 5030 transitions. [2022-11-20 11:36:14,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1945 transitions, 26466 flow [2022-11-20 11:36:18,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1945 transitions, 23785 flow, removed 1313 selfloop flow, removed 24 redundant places. [2022-11-20 11:36:18,764 INFO L231 Difference]: Finished difference. Result has 414 places, 1284 transitions, 17261 flow [2022-11-20 11:36:18,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=17261, PETRI_PLACES=414, PETRI_TRANSITIONS=1284} [2022-11-20 11:36:18,766 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 293 predicate places. [2022-11-20 11:36:18,766 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1284 transitions, 17261 flow [2022-11-20 11:36:18,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 47.406976744186046) internal successors, (4077), 86 states have internal predecessors, (4077), 0 states have call successors, (0), 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 11:36:18,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:18,768 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:36:18,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:18,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:36:18,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:18,974 INFO L85 PathProgramCache]: Analyzing trace with hash 950879276, now seen corresponding path program 2 times [2022-11-20 11:36:18,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:18,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783423061] [2022-11-20 11:36:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:18,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783423061] [2022-11-20 11:36:21,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783423061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659924001] [2022-11-20 11:36:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:36:21,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:21,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:21,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:21,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:36:21,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:36:21,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:36:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-20 11:36:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:36:23,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:36:23,112 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 21 treesize of output 10 [2022-11-20 11:36:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:23,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:24,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:36:24,364 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 51 treesize of output 31 [2022-11-20 11:36:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:25,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659924001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:36:25,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:36:25,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 25] total 74 [2022-11-20 11:36:25,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599303100] [2022-11-20 11:36:25,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-20 11:36:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-20 11:36:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=4766, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 11:36:25,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-11-20 11:36:25,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1284 transitions, 17261 flow. Second operand has 74 states, 74 states have (on average 57.567567567567565) internal successors, (4260), 74 states have internal predecessors, (4260), 0 states have call successors, (0), 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 11:36:25,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:25,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-11-20 11:36:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:36:47,297 INFO L130 PetriNetUnfolder]: 13240/27370 cut-off events. [2022-11-20 11:36:47,297 INFO L131 PetriNetUnfolder]: For 434605/434924 co-relation queries the response was YES. [2022-11-20 11:36:48,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177298 conditions, 27370 events. 13240/27370 cut-off events. For 434605/434924 co-relation queries the response was YES. Maximal size of possible extension queue 1513. Compared 280398 event pairs, 1693 based on Foata normal form. 130/27434 useless extension candidates. Maximal degree in co-relation 177194. Up to 15368 conditions per place. [2022-11-20 11:36:48,227 INFO L137 encePairwiseOnDemand]: 98/136 looper letters, 826 selfloop transitions, 1794 changer transitions 72/2737 dead transitions. [2022-11-20 11:36:48,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2737 transitions, 43883 flow [2022-11-20 11:36:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-20 11:36:48,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-11-20 11:36:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5424 transitions. [2022-11-20 11:36:48,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43826761473820297 [2022-11-20 11:36:48,239 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5424 transitions. [2022-11-20 11:36:48,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5424 transitions. [2022-11-20 11:36:48,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:36:48,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5424 transitions. [2022-11-20 11:36:48,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 59.604395604395606) internal successors, (5424), 91 states have internal predecessors, (5424), 0 states have call successors, (0), 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 11:36:48,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 136.0) internal successors, (12512), 92 states have internal predecessors, (12512), 0 states have call successors, (0), 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 11:36:48,271 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 136.0) internal successors, (12512), 92 states have internal predecessors, (12512), 0 states have call successors, (0), 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 11:36:48,272 INFO L175 Difference]: Start difference. First operand has 414 places, 1284 transitions, 17261 flow. Second operand 91 states and 5424 transitions. [2022-11-20 11:36:48,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2737 transitions, 43883 flow [2022-11-20 11:36:54,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 2737 transitions, 42793 flow, removed 499 selfloop flow, removed 34 redundant places. [2022-11-20 11:36:54,993 INFO L231 Difference]: Finished difference. Result has 490 places, 2480 transitions, 42685 flow [2022-11-20 11:36:54,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=16672, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=814, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=42685, PETRI_PLACES=490, PETRI_TRANSITIONS=2480} [2022-11-20 11:36:54,995 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 369 predicate places. [2022-11-20 11:36:54,995 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 2480 transitions, 42685 flow [2022-11-20 11:36:54,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 57.567567567567565) internal successors, (4260), 74 states have internal predecessors, (4260), 0 states have call successors, (0), 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 11:36:54,996 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:36:54,996 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:36:55,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:55,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:36:55,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:36:55,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:55,203 INFO L85 PathProgramCache]: Analyzing trace with hash -397462886, now seen corresponding path program 3 times [2022-11-20 11:36:55,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:36:55,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520968405] [2022-11-20 11:36:55,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:36:55,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:36:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:36:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:36:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:36:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520968405] [2022-11-20 11:36:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520968405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698686527] [2022-11-20 11:36:57,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:36:57,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:57,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:57,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ae4e544-8192-41c6-a957-c1aa1a154384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:36:57,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:36:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:36:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:36:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:58,114 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-20 11:36:58,115 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 23 treesize of output 10 [2022-11-20 11:36:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:36:58,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:58,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:36:58,763 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 40 treesize of output 28 [2022-11-20 11:36:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:36:59,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698686527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:36:59,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:36:59,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 15] total 49 [2022-11-20 11:36:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010791927] [2022-11-20 11:36:59,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:59,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 11:36:59,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:36:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 11:36:59,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 11:36:59,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-11-20 11:36:59,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 2480 transitions, 42685 flow. Second operand has 49 states, 49 states have (on average 57.91836734693877) internal successors, (2838), 49 states have internal predecessors, (2838), 0 states have call successors, (0), 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 11:36:59,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:36:59,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-11-20 11:36:59,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand