./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-38b53e6 [2022-11-25 15:32:52,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:32:52,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:32:52,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:32:52,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:32:52,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:32:52,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:32:52,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:32:52,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:32:52,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:32:52,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:32:52,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:32:52,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:32:52,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:32:52,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:32:52,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:32:52,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:32:52,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:32:52,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:32:52,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:32:52,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:32:52,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:32:52,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:32:52,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:32:52,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:32:52,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:32:52,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:32:52,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:32:52,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:32:52,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:32:52,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:32:52,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:32:52,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:32:52,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:32:52,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:32:52,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:32:52,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:32:52,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:32:52,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:32:52,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:32:52,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:32:52,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:32:52,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:32:52,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:32:52,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:32:52,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:32:52,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:32:52,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:32:52,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:32:52,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:32:52,675 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:32:52,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:32:52,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:32:52,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:32:52,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:32:52,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:32:52,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:32:52,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:32:52,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:32:52,678 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:32:52,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:32:52,679 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:32:52,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:32:52,679 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:32:52,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:32:52,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:32:52,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:52,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:32:52,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:32:52,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:32:52,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:32:52,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:32:52,682 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:32:52,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:32:52,682 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:32:52,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:32:52,683 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-25 15:32:52,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:32:53,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:32:53,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:32:53,004 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:32:53,005 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:32:53,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-25 15:32:56,072 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:32:56,336 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:32:56,337 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-25 15:32:56,343 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/data/57cfbe0d6/21effef539b64cc0af1828d3c524f3a0/FLAG9c7bfc73d [2022-11-25 15:32:56,357 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/data/57cfbe0d6/21effef539b64cc0af1828d3c524f3a0 [2022-11-25 15:32:56,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:32:56,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:32:56,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:56,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:32:56,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:32:56,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53596fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56, skipping insertion in model container [2022-11-25 15:32:56,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:32:56,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:32:56,556 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:56,558 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:56,563 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:56,564 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:56,571 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_95bc5137-a726-4637-940e-f1e61da35011/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-25 15:32:56,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:56,593 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:32:56,607 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:56,608 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:56,610 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:32:56,611 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:32:56,614 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_95bc5137-a726-4637-940e-f1e61da35011/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-25 15:32:56,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:32:56,636 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:32:56,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56 WrapperNode [2022-11-25 15:32:56,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:32:56,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:56,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:32:56,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:32:56,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,687 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-11-25 15:32:56,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:32:56,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:32:56,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:32:56,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:32:56,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:32:56,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:32:56,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:32:56,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:32:56,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (1/1) ... [2022-11-25 15:32:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:32:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:32:56,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:32:56,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:32:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:32:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:32:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:32:56,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:32:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 15:32:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 15:32:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 15:32:56,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 15:32:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:32:56,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:32:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:32:56,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:32:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:32:56,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:32:56,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:32:56,844 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:32:57,030 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:32:57,033 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:32:57,442 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:32:57,577 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:32:57,577 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:32:57,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:57 BoogieIcfgContainer [2022-11-25 15:32:57,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:32:57,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:32:57,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:32:57,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:32:57,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:32:56" (1/3) ... [2022-11-25 15:32:57,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d132f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:57, skipping insertion in model container [2022-11-25 15:32:57,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:32:56" (2/3) ... [2022-11-25 15:32:57,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d132f39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:32:57, skipping insertion in model container [2022-11-25 15:32:57,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:32:57" (3/3) ... [2022-11-25 15:32:57,590 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-25 15:32:57,600 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:32:57,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:32:57,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:32:57,612 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:32:57,672 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:32:57,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-11-25 15:32:57,817 INFO L130 PetriNetUnfolder]: 9/115 cut-off events. [2022-11-25 15:32:57,818 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-11-25 15:32:57,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-11-25 15:32:57,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-11-25 15:32:57,832 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:32:57,848 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 106 transitions, 224 flow [2022-11-25 15:32:57,851 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 106 transitions, 224 flow [2022-11-25 15:32:57,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 106 transitions, 224 flow [2022-11-25 15:32:57,880 INFO L130 PetriNetUnfolder]: 9/106 cut-off events. [2022-11-25 15:32:57,880 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:32:57,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 9/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-11-25 15:32:57,882 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-11-25 15:33:03,083 INFO L134 LiptonReduction]: Checked pairs total: 607 [2022-11-25 15:33:03,084 INFO L136 LiptonReduction]: Total number of compositions: 102 [2022-11-25 15:33:03,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:33:03,106 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;@5ac77a2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:33:03,106 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 15:33:03,112 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-11-25 15:33:03,112 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 15:33:03,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:03,113 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:03,114 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash -537791574, now seen corresponding path program 1 times [2022-11-25 15:33:03,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:03,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131754013] [2022-11-25 15:33:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:03,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131754013] [2022-11-25 15:33:03,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131754013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:03,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:03,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 15:33:03,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057354325] [2022-11-25 15:33:03,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:33:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:03,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:33:03,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:33:03,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 219 [2022-11-25 15:33:03,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:03,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 219 [2022-11-25 15:33:03,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:03,703 INFO L130 PetriNetUnfolder]: 66/116 cut-off events. [2022-11-25 15:33:03,703 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 15:33:03,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 316 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2022-11-25 15:33:03,706 INFO L137 encePairwiseOnDemand]: 215/219 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2022-11-25 15:33:03,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2022-11-25 15:33:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:33:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:33:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-11-25 15:33:03,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5098934550989346 [2022-11-25 15:33:03,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-11-25 15:33:03,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-11-25 15:33:03,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:03,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-11-25 15:33:03,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,741 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 335 transitions. [2022-11-25 15:33:03,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2022-11-25 15:33:03,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 15:33:03,747 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2022-11-25 15:33:03,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2022-11-25 15:33:03,753 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-11-25 15:33:03,753 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2022-11-25 15:33:03,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:03,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:03,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:33:03,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:03,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:03,756 INFO L85 PathProgramCache]: Analyzing trace with hash 151448096, now seen corresponding path program 1 times [2022-11-25 15:33:03,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:03,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599337998] [2022-11-25 15:33:03,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:03,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:04,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599337998] [2022-11-25 15:33:04,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599337998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:04,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:33:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067836451] [2022-11-25 15:33:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:04,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:33:04,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:33:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:33:04,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 219 [2022-11-25 15:33:04,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:04,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 219 [2022-11-25 15:33:04,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:04,325 INFO L130 PetriNetUnfolder]: 113/217 cut-off events. [2022-11-25 15:33:04,325 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-25 15:33:04,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 819 event pairs, 48 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2022-11-25 15:33:04,331 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 35 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2022-11-25 15:33:04,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2022-11-25 15:33:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:33:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 511 transitions. [2022-11-25 15:33:04,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-11-25 15:33:04,340 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 511 transitions. [2022-11-25 15:33:04,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 511 transitions. [2022-11-25 15:33:04,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:04,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 511 transitions. [2022-11-25 15:33:04,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,350 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,350 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 511 transitions. [2022-11-25 15:33:04,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2022-11-25 15:33:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:04,352 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 84 flow [2022-11-25 15:33:04,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-11-25 15:33:04,354 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-11-25 15:33:04,354 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 84 flow [2022-11-25 15:33:04,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:04,356 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:04,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:33:04,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 665511851, now seen corresponding path program 1 times [2022-11-25 15:33:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:04,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516116088] [2022-11-25 15:33:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:04,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:04,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516116088] [2022-11-25 15:33:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516116088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:04,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:04,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:33:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223171888] [2022-11-25 15:33:04,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:33:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:33:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:33:04,554 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 219 [2022-11-25 15:33:04,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:04,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 219 [2022-11-25 15:33:04,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:04,655 INFO L130 PetriNetUnfolder]: 79/161 cut-off events. [2022-11-25 15:33:04,655 INFO L131 PetriNetUnfolder]: For 65/71 co-relation queries the response was YES. [2022-11-25 15:33:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 161 events. 79/161 cut-off events. For 65/71 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 547 event pairs, 40 based on Foata normal form. 12/162 useless extension candidates. Maximal degree in co-relation 300. Up to 116 conditions per place. [2022-11-25 15:33:04,657 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2022-11-25 15:33:04,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 185 flow [2022-11-25 15:33:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:33:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 508 transitions. [2022-11-25 15:33:04,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4639269406392694 [2022-11-25 15:33:04,660 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 508 transitions. [2022-11-25 15:33:04,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 508 transitions. [2022-11-25 15:33:04,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:04,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 508 transitions. [2022-11-25 15:33:04,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,665 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 84 flow. Second operand 5 states and 508 transitions. [2022-11-25 15:33:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 185 flow [2022-11-25 15:33:04,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 179 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:04,667 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 74 flow [2022-11-25 15:33:04,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2022-11-25 15:33:04,668 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2022-11-25 15:33:04,669 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 74 flow [2022-11-25 15:33:04,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:04,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:04,670 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:04,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:33:04,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1946396593, now seen corresponding path program 1 times [2022-11-25 15:33:04,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:04,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578328657] [2022-11-25 15:33:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:04,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:04,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578328657] [2022-11-25 15:33:04,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578328657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:04,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895295420] [2022-11-25 15:33:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:04,799 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:04,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:33:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:33:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:05,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895295420] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:05,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:33:05,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-25 15:33:05,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531050052] [2022-11-25 15:33:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:05,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:33:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:33:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:05,189 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:05,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2022-11-25 15:33:05,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:05,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:05,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:05,291 INFO L130 PetriNetUnfolder]: 68/122 cut-off events. [2022-11-25 15:33:05,291 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-11-25 15:33:05,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 122 events. 68/122 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 335 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 312. Up to 92 conditions per place. [2022-11-25 15:33:05,293 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2022-11-25 15:33:05,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 149 flow [2022-11-25 15:33:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:05,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:33:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-11-25 15:33:05,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4420091324200913 [2022-11-25 15:33:05,305 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-11-25 15:33:05,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-11-25 15:33:05,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:05,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-11-25 15:33:05,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,311 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:05,311 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 74 flow. Second operand 5 states and 484 transitions. [2022-11-25 15:33:05,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 149 flow [2022-11-25 15:33:05,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-25 15:33:05,313 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2022-11-25 15:33:05,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2022-11-25 15:33:05,314 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-11-25 15:33:05,314 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2022-11-25 15:33:05,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2022-11-25 15:33:05,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:05,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:05,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:05,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:05,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1515576612, now seen corresponding path program 1 times [2022-11-25 15:33:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686990044] [2022-11-25 15:33:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:05,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:05,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:05,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686990044] [2022-11-25 15:33:05,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686990044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:05,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601763357] [2022-11-25 15:33:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:05,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:05,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:05,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:33:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:05,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:33:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:05,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:05,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601763357] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:05,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:33:05,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-25 15:33:05,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821689111] [2022-11-25 15:33:05,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:05,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:33:05,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:05,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:33:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:05,978 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:05,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2022-11-25 15:33:05,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:05,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:06,051 INFO L130 PetriNetUnfolder]: 52/97 cut-off events. [2022-11-25 15:33:06,051 INFO L131 PetriNetUnfolder]: For 61/71 co-relation queries the response was YES. [2022-11-25 15:33:06,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 61/71 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 223 event pairs, 20 based on Foata normal form. 18/113 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2022-11-25 15:33:06,054 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2022-11-25 15:33:06,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2022-11-25 15:33:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 15:33:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 484 transitions. [2022-11-25 15:33:06,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4420091324200913 [2022-11-25 15:33:06,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 484 transitions. [2022-11-25 15:33:06,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 484 transitions. [2022-11-25 15:33:06,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:06,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 484 transitions. [2022-11-25 15:33:06,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:06,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:06,064 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:06,065 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 484 transitions. [2022-11-25 15:33:06,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2022-11-25 15:33:06,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:06,069 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2022-11-25 15:33:06,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-11-25 15:33:06,074 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2022-11-25 15:33:06,075 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2022-11-25 15:33:06,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2022-11-25 15:33:06,075 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:06,075 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:06,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:06,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:06,282 INFO L85 PathProgramCache]: Analyzing trace with hash 143890495, now seen corresponding path program 1 times [2022-11-25 15:33:06,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:06,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660598159] [2022-11-25 15:33:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:06,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:07,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660598159] [2022-11-25 15:33:07,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660598159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:07,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650997839] [2022-11-25 15:33:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:07,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:07,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:07,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:33:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 15:33:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:07,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:33:07,464 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 [2022-11-25 15:33:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:07,577 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 14 treesize of output 16 [2022-11-25 15:33:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:07,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:07,790 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int))) (<= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ c_~counter~0 1)))) is different from false [2022-11-25 15:33:07,846 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))) (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))))) is different from false [2022-11-25 15:33:07,860 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-11-25 15:33:07,906 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2022-11-25 15:33:07,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:07,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2022-11-25 15:33:07,929 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 286 treesize of output 254 [2022-11-25 15:33:07,936 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 254 treesize of output 238 [2022-11-25 15:33:07,944 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 238 treesize of output 222 [2022-11-25 15:33:08,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:08,644 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-11-25 15:33:08,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:33:08,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2022-11-25 15:33:08,663 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 56 treesize of output 52 [2022-11-25 15:33:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-25 15:33:08,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650997839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:08,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:08,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-25 15:33:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549009584] [2022-11-25 15:33:08,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:33:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:33:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=245, Unknown=4, NotChecked=140, Total=462 [2022-11-25 15:33:08,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 219 [2022-11-25 15:33:08,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 22 states, 22 states have (on average 69.54545454545455) internal successors, (1530), 22 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:08,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:08,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 219 [2022-11-25 15:33:08,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:09,210 INFO L130 PetriNetUnfolder]: 110/198 cut-off events. [2022-11-25 15:33:09,210 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-25 15:33:09,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 602 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2022-11-25 15:33:09,212 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2022-11-25 15:33:09,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2022-11-25 15:33:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 598 transitions. [2022-11-25 15:33:09,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.341324200913242 [2022-11-25 15:33:09,215 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 598 transitions. [2022-11-25 15:33:09,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 598 transitions. [2022-11-25 15:33:09,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:09,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 598 transitions. [2022-11-25 15:33:09,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 74.75) internal successors, (598), 8 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:09,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:09,221 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:09,221 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 598 transitions. [2022-11-25 15:33:09,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2022-11-25 15:33:09,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:09,224 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2022-11-25 15:33:09,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2022-11-25 15:33:09,225 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2022-11-25 15:33:09,225 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2022-11-25 15:33:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 69.54545454545455) internal successors, (1530), 22 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:09,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:09,226 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:09,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:09,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:09,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1806602495, now seen corresponding path program 2 times [2022-11-25 15:33:09,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:09,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636459755] [2022-11-25 15:33:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:09,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636459755] [2022-11-25 15:33:09,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636459755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:09,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754566603] [2022-11-25 15:33:09,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:09,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:09,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:09,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:09,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:33:09,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:09,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:09,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:33:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:10,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:10,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:10,084 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 22 treesize of output 19 [2022-11-25 15:33:10,096 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:33:10,097 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 [2022-11-25 15:33:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:10,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754566603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:10,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:10,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-11-25 15:33:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367180878] [2022-11-25 15:33:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:33:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:33:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:33:10,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:10,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 94.81818181818181) internal successors, (1043), 11 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:10,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:10,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:10,562 INFO L130 PetriNetUnfolder]: 137/246 cut-off events. [2022-11-25 15:33:10,562 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2022-11-25 15:33:10,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 772 event pairs, 27 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2022-11-25 15:33:10,564 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2022-11-25 15:33:10,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2022-11-25 15:33:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2022-11-25 15:33:10,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44944553163731243 [2022-11-25 15:33:10,568 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2022-11-25 15:33:10,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2022-11-25 15:33:10,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:10,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2022-11-25 15:33:10,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:10,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:10,573 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:10,574 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 689 transitions. [2022-11-25 15:33:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2022-11-25 15:33:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-11-25 15:33:10,580 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2022-11-25 15:33:10,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-25 15:33:10,581 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2022-11-25 15:33:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2022-11-25 15:33:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.81818181818181) internal successors, (1043), 11 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:10,586 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:10,586 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:10,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:10,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:10,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash -926753057, now seen corresponding path program 3 times [2022-11-25 15:33:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:10,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717043423] [2022-11-25 15:33:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:11,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717043423] [2022-11-25 15:33:11,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717043423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021709265] [2022-11-25 15:33:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:33:11,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:11,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:11,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:11,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:33:11,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:33:11,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:33:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:11,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:11,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:11,475 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 22 treesize of output 19 [2022-11-25 15:33:11,490 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:33:11,491 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 [2022-11-25 15:33:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:11,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021709265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:11,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-11-25 15:33:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333044097] [2022-11-25 15:33:11,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:11,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:33:11,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:33:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:33:11,811 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:11,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:11,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:11,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:11,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:12,061 INFO L130 PetriNetUnfolder]: 153/275 cut-off events. [2022-11-25 15:33:12,061 INFO L131 PetriNetUnfolder]: For 457/457 co-relation queries the response was YES. [2022-11-25 15:33:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 275 events. 153/275 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 914 event pairs, 31 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 1053. Up to 219 conditions per place. [2022-11-25 15:33:12,064 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 46 selfloop transitions, 14 changer transitions 1/61 dead transitions. [2022-11-25 15:33:12,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 472 flow [2022-11-25 15:33:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2022-11-25 15:33:12,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4507501630789302 [2022-11-25 15:33:12,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2022-11-25 15:33:12,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2022-11-25 15:33:12,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:12,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2022-11-25 15:33:12,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:12,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:12,073 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:12,073 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 691 transitions. [2022-11-25 15:33:12,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 472 flow [2022-11-25 15:33:12,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:12,077 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 334 flow [2022-11-25 15:33:12,077 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2022-11-25 15:33:12,078 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2022-11-25 15:33:12,078 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 334 flow [2022-11-25 15:33:12,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:12,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:12,079 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:12,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:12,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1017881139, now seen corresponding path program 4 times [2022-11-25 15:33:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065137641] [2022-11-25 15:33:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:12,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065137641] [2022-11-25 15:33:12,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065137641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:12,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890957400] [2022-11-25 15:33:12,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:33:12,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:12,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:12,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:33:12,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:33:12,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:12,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:33:12,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:12,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:12,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:12,982 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 22 treesize of output 19 [2022-11-25 15:33:12,995 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 15:33:12,996 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 [2022-11-25 15:33:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890957400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:13,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:13,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-11-25 15:33:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137862523] [2022-11-25 15:33:13,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:13,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:33:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:33:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:33:13,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:13,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:13,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:13,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:13,483 INFO L130 PetriNetUnfolder]: 175/314 cut-off events. [2022-11-25 15:33:13,483 INFO L131 PetriNetUnfolder]: For 727/727 co-relation queries the response was YES. [2022-11-25 15:33:13,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286 conditions, 314 events. 175/314 cut-off events. For 727/727 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1089 event pairs, 39 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1254. Up to 262 conditions per place. [2022-11-25 15:33:13,486 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 48 selfloop transitions, 14 changer transitions 1/63 dead transitions. [2022-11-25 15:33:13,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 540 flow [2022-11-25 15:33:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2022-11-25 15:33:13,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44944553163731243 [2022-11-25 15:33:13,489 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2022-11-25 15:33:13,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2022-11-25 15:33:13,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:13,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2022-11-25 15:33:13,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,494 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,494 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 334 flow. Second operand 7 states and 689 transitions. [2022-11-25 15:33:13,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 540 flow [2022-11-25 15:33:13,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 504 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:13,499 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 380 flow [2022-11-25 15:33:13,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2022-11-25 15:33:13,500 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2022-11-25 15:33:13,500 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 380 flow [2022-11-25 15:33:13,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:13,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:13,501 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:13,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:13,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:13,706 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:13,707 INFO L85 PathProgramCache]: Analyzing trace with hash -52578465, now seen corresponding path program 5 times [2022-11-25 15:33:13,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:13,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880021330] [2022-11-25 15:33:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:13,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:14,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880021330] [2022-11-25 15:33:14,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880021330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:14,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261120293] [2022-11-25 15:33:14,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:33:14,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:14,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:14,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:14,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:33:14,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:14,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 15:33:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:14,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:33:14,272 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 [2022-11-25 15:33:14,306 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 [2022-11-25 15:33:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:14,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:14,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261120293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:14,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:14,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 4] total 12 [2022-11-25 15:33:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559686268] [2022-11-25 15:33:14,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:33:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:33:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:33:14,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 219 [2022-11-25 15:33:14,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 380 flow. Second operand has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:14,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:14,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 219 [2022-11-25 15:33:14,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:15,172 INFO L130 PetriNetUnfolder]: 197/353 cut-off events. [2022-11-25 15:33:15,172 INFO L131 PetriNetUnfolder]: For 993/993 co-relation queries the response was YES. [2022-11-25 15:33:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1469 conditions, 353 events. 197/353 cut-off events. For 993/993 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1285 event pairs, 49 based on Foata normal form. 1/353 useless extension candidates. Maximal degree in co-relation 1435. Up to 301 conditions per place. [2022-11-25 15:33:15,175 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 49 selfloop transitions, 15 changer transitions 1/65 dead transitions. [2022-11-25 15:33:15,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 593 flow [2022-11-25 15:33:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 724 transitions. [2022-11-25 15:33:15,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4132420091324201 [2022-11-25 15:33:15,179 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 724 transitions. [2022-11-25 15:33:15,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 724 transitions. [2022-11-25 15:33:15,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:15,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 724 transitions. [2022-11-25 15:33:15,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 90.5) internal successors, (724), 8 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:15,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:15,185 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:15,186 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 380 flow. Second operand 8 states and 724 transitions. [2022-11-25 15:33:15,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 593 flow [2022-11-25 15:33:15,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 554 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:15,196 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 433 flow [2022-11-25 15:33:15,197 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=433, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2022-11-25 15:33:15,198 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2022-11-25 15:33:15,198 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 433 flow [2022-11-25 15:33:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.42857142857143) internal successors, (1224), 14 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:15,199 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:15,199 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:15,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:33:15,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1579333799, now seen corresponding path program 6 times [2022-11-25 15:33:15,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92614474] [2022-11-25 15:33:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:15,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92614474] [2022-11-25 15:33:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92614474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241807740] [2022-11-25 15:33:15,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:33:15,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:15,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:15,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:15,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:33:15,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:33:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 15:33:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:16,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:16,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:16,132 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 17 treesize of output 16 [2022-11-25 15:33:16,144 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 15:33:16,145 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 18 treesize of output 11 [2022-11-25 15:33:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:16,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241807740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:16,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:16,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2022-11-25 15:33:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537471613] [2022-11-25 15:33:16,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:16,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:33:16,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:33:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:33:16,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:16,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 433 flow. Second operand has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:16,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:16,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:16,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:16,685 INFO L130 PetriNetUnfolder]: 225/402 cut-off events. [2022-11-25 15:33:16,685 INFO L131 PetriNetUnfolder]: For 1273/1273 co-relation queries the response was YES. [2022-11-25 15:33:16,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 402 events. 225/402 cut-off events. For 1273/1273 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1529 event pairs, 43 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1682. Up to 330 conditions per place. [2022-11-25 15:33:16,689 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 52 selfloop transitions, 19 changer transitions 1/72 dead transitions. [2022-11-25 15:33:16,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 72 transitions, 694 flow [2022-11-25 15:33:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:16,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2022-11-25 15:33:16,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44944553163731243 [2022-11-25 15:33:16,692 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2022-11-25 15:33:16,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2022-11-25 15:33:16,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:16,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2022-11-25 15:33:16,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:16,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:16,697 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:16,698 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 433 flow. Second operand 7 states and 689 transitions. [2022-11-25 15:33:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 72 transitions, 694 flow [2022-11-25 15:33:16,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 645 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-11-25 15:33:16,706 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 525 flow [2022-11-25 15:33:16,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2022-11-25 15:33:16,708 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2022-11-25 15:33:16,708 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 525 flow [2022-11-25 15:33:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 94.63636363636364) internal successors, (1041), 11 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:16,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:16,709 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:16,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:16,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:16,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1578387500, now seen corresponding path program 7 times [2022-11-25 15:33:16,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:16,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350246377] [2022-11-25 15:33:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350246377] [2022-11-25 15:33:17,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350246377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113993867] [2022-11-25 15:33:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:33:17,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:17,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:17,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:33:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:33:17,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:17,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:17,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113993867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:17,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:17,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 15:33:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20697117] [2022-11-25 15:33:17,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:33:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:33:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:33:17,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:17,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 525 flow. Second operand has 14 states, 14 states have (on average 94.42857142857143) internal successors, (1322), 14 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:17,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:17,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:17,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:17,789 INFO L130 PetriNetUnfolder]: 371/695 cut-off events. [2022-11-25 15:33:17,789 INFO L131 PetriNetUnfolder]: For 2671/2700 co-relation queries the response was YES. [2022-11-25 15:33:17,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 695 events. 371/695 cut-off events. For 2671/2700 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3416 event pairs, 86 based on Foata normal form. 57/743 useless extension candidates. Maximal degree in co-relation 2560. Up to 275 conditions per place. [2022-11-25 15:33:17,796 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 103 selfloop transitions, 16 changer transitions 0/123 dead transitions. [2022-11-25 15:33:17,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1289 flow [2022-11-25 15:33:17,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 784 transitions. [2022-11-25 15:33:17,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4474885844748858 [2022-11-25 15:33:17,799 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 784 transitions. [2022-11-25 15:33:17,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 784 transitions. [2022-11-25 15:33:17,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:17,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 784 transitions. [2022-11-25 15:33:17,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.0) internal successors, (784), 8 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:17,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:17,807 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:17,807 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 525 flow. Second operand 8 states and 784 transitions. [2022-11-25 15:33:17,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1289 flow [2022-11-25 15:33:17,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 1168 flow, removed 52 selfloop flow, removed 2 redundant places. [2022-11-25 15:33:17,825 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 694 flow [2022-11-25 15:33:17,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2022-11-25 15:33:17,826 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2022-11-25 15:33:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 694 flow [2022-11-25 15:33:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.42857142857143) internal successors, (1322), 14 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:17,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:17,827 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:17,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:18,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash -919430563, now seen corresponding path program 8 times [2022-11-25 15:33:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625809464] [2022-11-25 15:33:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:18,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:18,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625809464] [2022-11-25 15:33:18,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625809464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:18,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069458257] [2022-11-25 15:33:18,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:18,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:18,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:18,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:33:18,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:18,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:33:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:18,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:18,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069458257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:18,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:18,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 15:33:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360709356] [2022-11-25 15:33:18,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:18,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:33:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:33:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:33:18,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:18,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 94.14285714285714) internal successors, (1318), 14 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:18,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:18,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:18,897 INFO L130 PetriNetUnfolder]: 305/609 cut-off events. [2022-11-25 15:33:18,897 INFO L131 PetriNetUnfolder]: For 1852/1881 co-relation queries the response was YES. [2022-11-25 15:33:18,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 609 events. 305/609 cut-off events. For 1852/1881 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3104 event pairs, 89 based on Foata normal form. 55/659 useless extension candidates. Maximal degree in co-relation 2322. Up to 251 conditions per place. [2022-11-25 15:33:18,903 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 66 selfloop transitions, 4 changer transitions 36/110 dead transitions. [2022-11-25 15:33:18,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 1137 flow [2022-11-25 15:33:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 15:33:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 783 transitions. [2022-11-25 15:33:18,906 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4469178082191781 [2022-11-25 15:33:18,906 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 783 transitions. [2022-11-25 15:33:18,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 783 transitions. [2022-11-25 15:33:18,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:18,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 783 transitions. [2022-11-25 15:33:18,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.875) internal successors, (783), 8 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,912 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,913 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 694 flow. Second operand 8 states and 783 transitions. [2022-11-25 15:33:18,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 1137 flow [2022-11-25 15:33:18,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 1129 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 15:33:18,924 INFO L231 Difference]: Finished difference. Result has 86 places, 59 transitions, 567 flow [2022-11-25 15:33:18,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=86, PETRI_TRANSITIONS=59} [2022-11-25 15:33:18,925 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2022-11-25 15:33:18,925 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 59 transitions, 567 flow [2022-11-25 15:33:18,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 94.14285714285714) internal successors, (1318), 14 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:18,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:18,927 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:18,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:33:19,138 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1790584584, now seen corresponding path program 9 times [2022-11-25 15:33:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009393871] [2022-11-25 15:33:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:19,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:19,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009393871] [2022-11-25 15:33:19,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009393871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705713669] [2022-11-25 15:33:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:33:19,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:19,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:19,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:19,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:33:19,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:33:19,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:33:19,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:19,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:19,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705713669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:19,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:19,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-25 15:33:19,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939332588] [2022-11-25 15:33:19,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:19,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:33:19,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:19,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:33:19,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:33:19,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:19,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 59 transitions, 567 flow. Second operand has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:19,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:19,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:20,183 INFO L130 PetriNetUnfolder]: 165/296 cut-off events. [2022-11-25 15:33:20,184 INFO L131 PetriNetUnfolder]: For 1582/1589 co-relation queries the response was YES. [2022-11-25 15:33:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1606 conditions, 296 events. 165/296 cut-off events. For 1582/1589 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1049 event pairs, 28 based on Foata normal form. 51/346 useless extension candidates. Maximal degree in co-relation 1547. Up to 139 conditions per place. [2022-11-25 15:33:20,190 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 41 selfloop transitions, 25 changer transitions 0/70 dead transitions. [2022-11-25 15:33:20,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 70 transitions, 785 flow [2022-11-25 15:33:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2022-11-25 15:33:20,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44031311154598823 [2022-11-25 15:33:20,194 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2022-11-25 15:33:20,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2022-11-25 15:33:20,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:20,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2022-11-25 15:33:20,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:20,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:20,199 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:20,199 INFO L175 Difference]: Start difference. First operand has 86 places, 59 transitions, 567 flow. Second operand 7 states and 675 transitions. [2022-11-25 15:33:20,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 70 transitions, 785 flow [2022-11-25 15:33:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 630 flow, removed 69 selfloop flow, removed 11 redundant places. [2022-11-25 15:33:20,208 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 510 flow [2022-11-25 15:33:20,209 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=510, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-11-25 15:33:20,210 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2022-11-25 15:33:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 510 flow [2022-11-25 15:33:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:20,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:20,211 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:20,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:20,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 15:33:20,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1047932099, now seen corresponding path program 10 times [2022-11-25 15:33:20,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:20,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430450321] [2022-11-25 15:33:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:20,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430450321] [2022-11-25 15:33:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430450321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103409483] [2022-11-25 15:33:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:33:20,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:20,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:20,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:33:20,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:33:20,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:33:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:20,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:20,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103409483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:20,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:20,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-25 15:33:20,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423702113] [2022-11-25 15:33:20,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:33:20,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:20,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:33:20,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:33:20,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:20,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 510 flow. Second operand has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:20,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:20,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:20,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:21,149 INFO L130 PetriNetUnfolder]: 120/214 cut-off events. [2022-11-25 15:33:21,149 INFO L131 PetriNetUnfolder]: For 1312/1321 co-relation queries the response was YES. [2022-11-25 15:33:21,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 214 events. 120/214 cut-off events. For 1312/1321 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 650 event pairs, 27 based on Foata normal form. 31/242 useless extension candidates. Maximal degree in co-relation 1167. Up to 118 conditions per place. [2022-11-25 15:33:21,152 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 42 selfloop transitions, 25 changer transitions 0/71 dead transitions. [2022-11-25 15:33:21,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 71 transitions, 730 flow [2022-11-25 15:33:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:33:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 15:33:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2022-11-25 15:33:21,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44031311154598823 [2022-11-25 15:33:21,155 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2022-11-25 15:33:21,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2022-11-25 15:33:21,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:21,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2022-11-25 15:33:21,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:21,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:21,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:21,177 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 510 flow. Second operand 7 states and 675 transitions. [2022-11-25 15:33:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 71 transitions, 730 flow [2022-11-25 15:33:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 648 flow, removed 25 selfloop flow, removed 5 redundant places. [2022-11-25 15:33:21,186 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 522 flow [2022-11-25 15:33:21,186 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=522, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2022-11-25 15:33:21,187 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2022-11-25 15:33:21,187 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 522 flow [2022-11-25 15:33:21,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.06666666666666) internal successors, (1411), 15 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:21,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:21,188 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:21,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:21,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 15:33:21,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -415587462, now seen corresponding path program 11 times [2022-11-25 15:33:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:21,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936242809] [2022-11-25 15:33:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:22,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936242809] [2022-11-25 15:33:22,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936242809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:22,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30560729] [2022-11-25 15:33:22,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:33:22,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:22,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:22,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:22,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:33:22,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 15:33:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:22,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:22,938 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 22 treesize of output 22 [2022-11-25 15:33:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:23,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:23,337 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_450 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_450) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2))))) (forall ((v_ArrVal_450 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_450) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2))) (+ .cse0 c_~counter~0 1))))) is different from false [2022-11-25 15:33:23,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:23,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 74 [2022-11-25 15:33:23,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:23,374 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 18 treesize of output 12 [2022-11-25 15:33:23,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:33:23,456 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:23,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 15:33:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-25 15:33:23,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30560729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:23,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:23,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2022-11-25 15:33:23,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160361711] [2022-11-25 15:33:23,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:33:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:33:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=4, NotChecked=54, Total=870 [2022-11-25 15:33:23,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:33:23,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 522 flow. Second operand has 30 states, 30 states have (on average 62.7) internal successors, (1881), 30 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:23,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:23,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:33:23,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:25,389 INFO L130 PetriNetUnfolder]: 185/327 cut-off events. [2022-11-25 15:33:25,389 INFO L131 PetriNetUnfolder]: For 1870/1870 co-relation queries the response was YES. [2022-11-25 15:33:25,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 327 events. 185/327 cut-off events. For 1870/1870 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1095 event pairs, 11 based on Foata normal form. 1/327 useless extension candidates. Maximal degree in co-relation 1793. Up to 182 conditions per place. [2022-11-25 15:33:25,394 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 60 selfloop transitions, 51 changer transitions 1/112 dead transitions. [2022-11-25 15:33:25,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 112 transitions, 1044 flow [2022-11-25 15:33:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:33:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:33:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1187 transitions. [2022-11-25 15:33:25,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3011161846778285 [2022-11-25 15:33:25,399 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1187 transitions. [2022-11-25 15:33:25,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1187 transitions. [2022-11-25 15:33:25,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:25,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1187 transitions. [2022-11-25 15:33:25,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.94444444444444) internal successors, (1187), 18 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:25,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:25,410 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:25,411 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 522 flow. Second operand 18 states and 1187 transitions. [2022-11-25 15:33:25,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 112 transitions, 1044 flow [2022-11-25 15:33:25,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 975 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-11-25 15:33:25,421 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 806 flow [2022-11-25 15:33:25,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=806, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2022-11-25 15:33:25,422 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2022-11-25 15:33:25,422 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 806 flow [2022-11-25 15:33:25,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.7) internal successors, (1881), 30 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:25,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:25,423 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:25,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:25,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 15:33:25,629 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:25,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2038657172, now seen corresponding path program 12 times [2022-11-25 15:33:25,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:25,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938109317] [2022-11-25 15:33:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:26,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938109317] [2022-11-25 15:33:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938109317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347946400] [2022-11-25 15:33:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:33:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:26,247 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:26,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:33:26,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:33:26,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:26,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:33:26,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:26,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:26,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:26,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2022-11-25 15:33:26,777 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:26,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-11-25 15:33:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:26,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347946400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:26,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:26,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-11-25 15:33:26,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989733242] [2022-11-25 15:33:26,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:26,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:33:26,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:33:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:33:27,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:33:27,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 806 flow. Second operand has 15 states, 15 states have (on average 94.2) internal successors, (1413), 15 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:27,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:27,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:33:27,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:27,917 INFO L130 PetriNetUnfolder]: 272/484 cut-off events. [2022-11-25 15:33:27,918 INFO L131 PetriNetUnfolder]: For 3037/3037 co-relation queries the response was YES. [2022-11-25 15:33:27,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2953 conditions, 484 events. 272/484 cut-off events. For 3037/3037 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1813 event pairs, 29 based on Foata normal form. 2/485 useless extension candidates. Maximal degree in co-relation 2896. Up to 320 conditions per place. [2022-11-25 15:33:27,924 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 96 selfloop transitions, 43 changer transitions 2/141 dead transitions. [2022-11-25 15:33:27,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1550 flow [2022-11-25 15:33:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:33:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:33:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1378 transitions. [2022-11-25 15:33:27,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44944553163731243 [2022-11-25 15:33:27,928 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1378 transitions. [2022-11-25 15:33:27,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1378 transitions. [2022-11-25 15:33:27,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:27,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1378 transitions. [2022-11-25 15:33:27,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 98.42857142857143) internal successors, (1378), 14 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:27,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:27,940 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:27,941 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 806 flow. Second operand 14 states and 1378 transitions. [2022-11-25 15:33:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1550 flow [2022-11-25 15:33:27,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 141 transitions, 1396 flow, removed 42 selfloop flow, removed 11 redundant places. [2022-11-25 15:33:27,960 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 1080 flow [2022-11-25 15:33:27,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1080, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2022-11-25 15:33:27,961 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2022-11-25 15:33:27,962 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 1080 flow [2022-11-25 15:33:27,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.2) internal successors, (1413), 15 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:27,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:27,962 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:27,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 15:33:28,173 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 416861396, now seen corresponding path program 13 times [2022-11-25 15:33:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:28,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371039036] [2022-11-25 15:33:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:28,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371039036] [2022-11-25 15:33:29,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371039036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:29,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461643580] [2022-11-25 15:33:29,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:33:29,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:29,072 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:29,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:33:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 15:33:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:29,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:29,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:29,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 52 [2022-11-25 15:33:29,749 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-11-25 15:33:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:29,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461643580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:29,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:29,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-11-25 15:33:29,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821243849] [2022-11-25 15:33:29,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 15:33:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:29,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 15:33:29,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:33:31,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2022-11-25 15:33:31,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 1080 flow. Second operand has 26 states, 26 states have (on average 84.03846153846153) internal successors, (2185), 26 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:31,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:31,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2022-11-25 15:33:31,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:32,039 INFO L130 PetriNetUnfolder]: 304/542 cut-off events. [2022-11-25 15:33:32,039 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2022-11-25 15:33:32,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3336 conditions, 542 events. 304/542 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2082 event pairs, 45 based on Foata normal form. 2/543 useless extension candidates. Maximal degree in co-relation 3274. Up to 399 conditions per place. [2022-11-25 15:33:32,046 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 91 selfloop transitions, 46 changer transitions 2/139 dead transitions. [2022-11-25 15:33:32,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 139 transitions, 1601 flow [2022-11-25 15:33:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:33:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:33:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1483 transitions. [2022-11-25 15:33:32,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39833467633628794 [2022-11-25 15:33:32,050 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1483 transitions. [2022-11-25 15:33:32,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1483 transitions. [2022-11-25 15:33:32,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:32,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1483 transitions. [2022-11-25 15:33:32,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.23529411764706) internal successors, (1483), 17 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:32,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:32,059 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:32,060 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 1080 flow. Second operand 17 states and 1483 transitions. [2022-11-25 15:33:32,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 139 transitions, 1601 flow [2022-11-25 15:33:32,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 139 transitions, 1448 flow, removed 70 selfloop flow, removed 3 redundant places. [2022-11-25 15:33:32,076 INFO L231 Difference]: Finished difference. Result has 119 places, 103 transitions, 1116 flow [2022-11-25 15:33:32,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1116, PETRI_PLACES=119, PETRI_TRANSITIONS=103} [2022-11-25 15:33:32,077 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 98 predicate places. [2022-11-25 15:33:32,077 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 103 transitions, 1116 flow [2022-11-25 15:33:32,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 84.03846153846153) internal successors, (2185), 26 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:32,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:32,078 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:32,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 15:33:32,283 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1605852918, now seen corresponding path program 14 times [2022-11-25 15:33:32,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934912328] [2022-11-25 15:33:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:33,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934912328] [2022-11-25 15:33:33,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934912328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778636974] [2022-11-25 15:33:33,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:33,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:33,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:33:33,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:33,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:33:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:33,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:33,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:33:33,698 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:33:33,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:33:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:33,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778636974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:33,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:33,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2022-11-25 15:33:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634194742] [2022-11-25 15:33:33,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:33:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:33:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:33:34,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2022-11-25 15:33:34,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 103 transitions, 1116 flow. Second operand has 25 states, 25 states have (on average 83.0) internal successors, (2075), 25 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:34,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:34,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2022-11-25 15:33:34,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:35,582 INFO L130 PetriNetUnfolder]: 388/694 cut-off events. [2022-11-25 15:33:35,582 INFO L131 PetriNetUnfolder]: For 4601/4601 co-relation queries the response was YES. [2022-11-25 15:33:35,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 694 events. 388/694 cut-off events. For 4601/4601 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2923 event pairs, 71 based on Foata normal form. 2/695 useless extension candidates. Maximal degree in co-relation 4163. Up to 529 conditions per place. [2022-11-25 15:33:35,592 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 114 selfloop transitions, 46 changer transitions 2/162 dead transitions. [2022-11-25 15:33:35,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 162 transitions, 1950 flow [2022-11-25 15:33:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:33:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:33:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1557 transitions. [2022-11-25 15:33:35,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3949771689497717 [2022-11-25 15:33:35,596 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1557 transitions. [2022-11-25 15:33:35,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1557 transitions. [2022-11-25 15:33:35,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:35,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1557 transitions. [2022-11-25 15:33:35,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.5) internal successors, (1557), 18 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:35,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:35,606 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:35,606 INFO L175 Difference]: Start difference. First operand has 119 places, 103 transitions, 1116 flow. Second operand 18 states and 1557 transitions. [2022-11-25 15:33:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 162 transitions, 1950 flow [2022-11-25 15:33:35,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 162 transitions, 1843 flow, removed 24 selfloop flow, removed 12 redundant places. [2022-11-25 15:33:35,629 INFO L231 Difference]: Finished difference. Result has 129 places, 117 transitions, 1439 flow [2022-11-25 15:33:35,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1439, PETRI_PLACES=129, PETRI_TRANSITIONS=117} [2022-11-25 15:33:35,630 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2022-11-25 15:33:35,630 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 117 transitions, 1439 flow [2022-11-25 15:33:35,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.0) internal successors, (2075), 25 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:35,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:35,631 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:35,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:35,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:35,837 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash -787428690, now seen corresponding path program 15 times [2022-11-25 15:33:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:35,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968172567] [2022-11-25 15:33:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:35,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:36,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:36,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968172567] [2022-11-25 15:33:36,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968172567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083602357] [2022-11-25 15:33:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:33:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:36,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:36,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:33:36,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:33:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:33:36,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:37,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:37,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:37,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:33:37,320 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:33:37,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:33:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:37,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083602357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:37,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:37,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2022-11-25 15:33:37,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999072859] [2022-11-25 15:33:37,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:33:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:33:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:33:38,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2022-11-25 15:33:38,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 117 transitions, 1439 flow. Second operand has 24 states, 24 states have (on average 82.95833333333333) internal successors, (1991), 24 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:38,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:38,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2022-11-25 15:33:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:39,347 INFO L130 PetriNetUnfolder]: 448/801 cut-off events. [2022-11-25 15:33:39,348 INFO L131 PetriNetUnfolder]: For 6767/6767 co-relation queries the response was YES. [2022-11-25 15:33:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 801 events. 448/801 cut-off events. For 6767/6767 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3513 event pairs, 88 based on Foata normal form. 3/803 useless extension candidates. Maximal degree in co-relation 5014. Up to 641 conditions per place. [2022-11-25 15:33:39,365 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 129 selfloop transitions, 37 changer transitions 2/168 dead transitions. [2022-11-25 15:33:39,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 168 transitions, 2211 flow [2022-11-25 15:33:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:33:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:33:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1549 transitions. [2022-11-25 15:33:39,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39294774226281076 [2022-11-25 15:33:39,371 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1549 transitions. [2022-11-25 15:33:39,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1549 transitions. [2022-11-25 15:33:39,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:39,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1549 transitions. [2022-11-25 15:33:39,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.05555555555556) internal successors, (1549), 18 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:39,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:39,385 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:39,385 INFO L175 Difference]: Start difference. First operand has 129 places, 117 transitions, 1439 flow. Second operand 18 states and 1549 transitions. [2022-11-25 15:33:39,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 168 transitions, 2211 flow [2022-11-25 15:33:39,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 168 transitions, 1972 flow, removed 105 selfloop flow, removed 9 redundant places. [2022-11-25 15:33:39,429 INFO L231 Difference]: Finished difference. Result has 139 places, 127 transitions, 1529 flow [2022-11-25 15:33:39,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1529, PETRI_PLACES=139, PETRI_TRANSITIONS=127} [2022-11-25 15:33:39,430 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2022-11-25 15:33:39,430 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 127 transitions, 1529 flow [2022-11-25 15:33:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 82.95833333333333) internal successors, (1991), 24 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:39,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:39,432 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:39,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:39,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash 5088040, now seen corresponding path program 16 times [2022-11-25 15:33:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046085179] [2022-11-25 15:33:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:39,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:40,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046085179] [2022-11-25 15:33:40,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046085179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:40,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648754303] [2022-11-25 15:33:40,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:33:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:40,703 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:40,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:33:40,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:33:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:33:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:41,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:41,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:41,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:33:41,318 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:33:41,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:33:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648754303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:41,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2022-11-25 15:33:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431902437] [2022-11-25 15:33:41,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:33:41,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:33:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:33:42,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2022-11-25 15:33:42,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 127 transitions, 1529 flow. Second operand has 25 states, 25 states have (on average 83.0) internal successors, (2075), 25 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:42,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:42,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2022-11-25 15:33:42,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:43,657 INFO L130 PetriNetUnfolder]: 516/923 cut-off events. [2022-11-25 15:33:43,657 INFO L131 PetriNetUnfolder]: For 7649/7649 co-relation queries the response was YES. [2022-11-25 15:33:43,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5723 conditions, 923 events. 516/923 cut-off events. For 7649/7649 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4291 event pairs, 117 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 5647. Up to 773 conditions per place. [2022-11-25 15:33:43,669 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 124 selfloop transitions, 47 changer transitions 2/173 dead transitions. [2022-11-25 15:33:43,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 173 transitions, 2310 flow [2022-11-25 15:33:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 15:33:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 15:33:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1298 transitions. [2022-11-25 15:33:43,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39512937595129377 [2022-11-25 15:33:43,676 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1298 transitions. [2022-11-25 15:33:43,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1298 transitions. [2022-11-25 15:33:43,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:43,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1298 transitions. [2022-11-25 15:33:43,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 86.53333333333333) internal successors, (1298), 15 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:43,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:43,684 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:43,684 INFO L175 Difference]: Start difference. First operand has 139 places, 127 transitions, 1529 flow. Second operand 15 states and 1298 transitions. [2022-11-25 15:33:43,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 173 transitions, 2310 flow [2022-11-25 15:33:43,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 2033 flow, removed 100 selfloop flow, removed 16 redundant places. [2022-11-25 15:33:43,720 INFO L231 Difference]: Finished difference. Result has 141 places, 138 transitions, 1659 flow [2022-11-25 15:33:43,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1659, PETRI_PLACES=141, PETRI_TRANSITIONS=138} [2022-11-25 15:33:43,721 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 120 predicate places. [2022-11-25 15:33:43,721 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 138 transitions, 1659 flow [2022-11-25 15:33:43,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 83.0) internal successors, (2075), 25 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:43,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:43,722 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:43,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-25 15:33:43,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 15:33:43,927 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 679850668, now seen corresponding path program 17 times [2022-11-25 15:33:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495987413] [2022-11-25 15:33:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:44,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495987413] [2022-11-25 15:33:44,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495987413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:44,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096869665] [2022-11-25 15:33:44,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:33:44,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:44,695 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:44,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:33:44,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:33:44,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:33:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:45,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:45,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:45,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:33:45,326 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:33:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:33:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:45,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096869665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:45,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:45,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2022-11-25 15:33:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716164575] [2022-11-25 15:33:45,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:45,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:33:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:33:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:33:46,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2022-11-25 15:33:46,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 138 transitions, 1659 flow. Second operand has 25 states, 25 states have (on average 82.88) internal successors, (2072), 25 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:46,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:46,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2022-11-25 15:33:46,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:47,311 INFO L130 PetriNetUnfolder]: 564/1011 cut-off events. [2022-11-25 15:33:47,311 INFO L131 PetriNetUnfolder]: For 7655/7655 co-relation queries the response was YES. [2022-11-25 15:33:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 1011 events. 564/1011 cut-off events. For 7655/7655 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4829 event pairs, 134 based on Foata normal form. 2/1012 useless extension candidates. Maximal degree in co-relation 6100. Up to 836 conditions per place. [2022-11-25 15:33:47,326 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 136 selfloop transitions, 49 changer transitions 3/188 dead transitions. [2022-11-25 15:33:47,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 188 transitions, 2443 flow [2022-11-25 15:33:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:33:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:33:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1555 transitions. [2022-11-25 15:33:47,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39446981227803146 [2022-11-25 15:33:47,331 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1555 transitions. [2022-11-25 15:33:47,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1555 transitions. [2022-11-25 15:33:47,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:47,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1555 transitions. [2022-11-25 15:33:47,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 86.38888888888889) internal successors, (1555), 18 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:47,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:47,340 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:47,341 INFO L175 Difference]: Start difference. First operand has 141 places, 138 transitions, 1659 flow. Second operand 18 states and 1555 transitions. [2022-11-25 15:33:47,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 188 transitions, 2443 flow [2022-11-25 15:33:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 188 transitions, 2220 flow, removed 97 selfloop flow, removed 8 redundant places. [2022-11-25 15:33:47,381 INFO L231 Difference]: Finished difference. Result has 153 places, 145 transitions, 1755 flow [2022-11-25 15:33:47,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1755, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2022-11-25 15:33:47,382 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2022-11-25 15:33:47,382 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 1755 flow [2022-11-25 15:33:47,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.88) internal successors, (2072), 25 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:47,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:47,383 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:47,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 15:33:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:47,588 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1774851116, now seen corresponding path program 18 times [2022-11-25 15:33:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:47,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063270606] [2022-11-25 15:33:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:48,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063270606] [2022-11-25 15:33:48,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063270606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192339179] [2022-11-25 15:33:48,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:33:48,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:48,493 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:48,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:33:48,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:33:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 15:33:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:48,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:48,786 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 14 treesize of output 16 [2022-11-25 15:33:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:48,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:49,161 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_689 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_689) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1)) (+ (select .cse0 .cse2) c_~counter~0 1)))) (forall ((v_ArrVal_689 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_689) c_~A~0.base))) (<= (+ (select .cse3 .cse2) c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1))))))) is different from false [2022-11-25 15:33:49,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:49,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 83 [2022-11-25 15:33:49,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:49,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2022-11-25 15:33:49,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:33:49,309 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:49,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-11-25 15:33:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:49,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192339179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:49,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:49,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2022-11-25 15:33:49,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649839757] [2022-11-25 15:33:49,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:49,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:33:49,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:33:49,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=662, Unknown=1, NotChecked=52, Total=812 [2022-11-25 15:33:49,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 219 [2022-11-25 15:33:49,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 1755 flow. Second operand has 29 states, 29 states have (on average 65.72413793103448) internal successors, (1906), 29 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:49,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:49,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 219 [2022-11-25 15:33:49,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:50,909 INFO L130 PetriNetUnfolder]: 626/1123 cut-off events. [2022-11-25 15:33:50,909 INFO L131 PetriNetUnfolder]: For 9591/9591 co-relation queries the response was YES. [2022-11-25 15:33:50,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6859 conditions, 1123 events. 626/1123 cut-off events. For 9591/9591 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5524 event pairs, 135 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 6779. Up to 883 conditions per place. [2022-11-25 15:33:50,925 INFO L137 encePairwiseOnDemand]: 211/219 looper letters, 127 selfloop transitions, 63 changer transitions 2/192 dead transitions. [2022-11-25 15:33:50,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 192 transitions, 2608 flow [2022-11-25 15:33:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:33:50,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 15:33:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1244 transitions. [2022-11-25 15:33:50,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31557584982242515 [2022-11-25 15:33:50,928 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1244 transitions. [2022-11-25 15:33:50,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1244 transitions. [2022-11-25 15:33:50,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:50,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1244 transitions. [2022-11-25 15:33:50,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:50,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:50,936 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 219.0) internal successors, (4161), 19 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:50,936 INFO L175 Difference]: Start difference. First operand has 153 places, 145 transitions, 1755 flow. Second operand 18 states and 1244 transitions. [2022-11-25 15:33:50,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 192 transitions, 2608 flow [2022-11-25 15:33:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 192 transitions, 2424 flow, removed 64 selfloop flow, removed 13 redundant places. [2022-11-25 15:33:50,983 INFO L231 Difference]: Finished difference. Result has 161 places, 155 transitions, 2021 flow [2022-11-25 15:33:50,984 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2021, PETRI_PLACES=161, PETRI_TRANSITIONS=155} [2022-11-25 15:33:50,985 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2022-11-25 15:33:50,985 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 155 transitions, 2021 flow [2022-11-25 15:33:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 65.72413793103448) internal successors, (1906), 29 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:50,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:50,986 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:50,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:51,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 15:33:51,196 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1070280148, now seen corresponding path program 19 times [2022-11-25 15:33:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:51,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847526348] [2022-11-25 15:33:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847526348] [2022-11-25 15:33:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847526348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:51,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183490614] [2022-11-25 15:33:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:33:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:51,977 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:51,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:33:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:52,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 15:33:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:52,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:52,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:52,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-25 15:33:52,570 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:52,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 15:33:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:52,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183490614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:52,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:52,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 22 [2022-11-25 15:33:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079778521] [2022-11-25 15:33:52,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:33:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:33:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:33:53,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 219 [2022-11-25 15:33:53,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 155 transitions, 2021 flow. Second operand has 24 states, 24 states have (on average 85.0) internal successors, (2040), 24 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:53,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:53,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 219 [2022-11-25 15:33:53,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:54,350 INFO L130 PetriNetUnfolder]: 666/1192 cut-off events. [2022-11-25 15:33:54,350 INFO L131 PetriNetUnfolder]: For 10527/10527 co-relation queries the response was YES. [2022-11-25 15:33:54,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7396 conditions, 1192 events. 666/1192 cut-off events. For 10527/10527 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5942 event pairs, 197 based on Foata normal form. 1/1192 useless extension candidates. Maximal degree in co-relation 7312. Up to 1084 conditions per place. [2022-11-25 15:33:54,376 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 144 selfloop transitions, 40 changer transitions 1/185 dead transitions. [2022-11-25 15:33:54,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 185 transitions, 2713 flow [2022-11-25 15:33:54,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:33:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 15:33:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1226 transitions. [2022-11-25 15:33:54,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3998695368558382 [2022-11-25 15:33:54,380 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1226 transitions. [2022-11-25 15:33:54,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1226 transitions. [2022-11-25 15:33:54,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:54,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1226 transitions. [2022-11-25 15:33:54,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 87.57142857142857) internal successors, (1226), 14 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:54,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:54,387 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:54,387 INFO L175 Difference]: Start difference. First operand has 161 places, 155 transitions, 2021 flow. Second operand 14 states and 1226 transitions. [2022-11-25 15:33:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 185 transitions, 2713 flow [2022-11-25 15:33:54,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 185 transitions, 2456 flow, removed 99 selfloop flow, removed 12 redundant places. [2022-11-25 15:33:54,438 INFO L231 Difference]: Finished difference. Result has 165 places, 164 transitions, 2095 flow [2022-11-25 15:33:54,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2095, PETRI_PLACES=165, PETRI_TRANSITIONS=164} [2022-11-25 15:33:54,438 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2022-11-25 15:33:54,439 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 164 transitions, 2095 flow [2022-11-25 15:33:54,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.0) internal successors, (2040), 24 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:54,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:54,439 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:54,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:54,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 15:33:54,645 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -211724390, now seen corresponding path program 20 times [2022-11-25 15:33:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:54,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076426070] [2022-11-25 15:33:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:55,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076426070] [2022-11-25 15:33:55,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076426070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:55,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152769915] [2022-11-25 15:33:55,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:33:55,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:55,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:55,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 15:33:55,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:33:55,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:33:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 15:33:55,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:33:56,030 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 19 treesize of output 21 [2022-11-25 15:33:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:56,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:56,433 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_758 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_758) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1)) (+ (select .cse0 .cse2) c_~counter~0 1)))) (forall ((v_ArrVal_758 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_758) c_~A~0.base))) (<= (+ (select .cse3 .cse2) c_~counter~0) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1))))))) is different from false [2022-11-25 15:33:56,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:56,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 83 [2022-11-25 15:33:56,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:33:56,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 36 [2022-11-25 15:33:56,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:33:56,575 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:33:56,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 17 [2022-11-25 15:33:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:33:56,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152769915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:56,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:56,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-11-25 15:33:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227536679] [2022-11-25 15:33:56,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:33:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:56,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:33:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=719, Unknown=1, NotChecked=54, Total=870 [2022-11-25 15:33:56,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:33:56,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 164 transitions, 2095 flow. Second operand has 30 states, 30 states have (on average 62.6) internal successors, (1878), 30 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:56,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:33:56,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:33:56,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:33:58,686 INFO L130 PetriNetUnfolder]: 715/1281 cut-off events. [2022-11-25 15:33:58,686 INFO L131 PetriNetUnfolder]: For 11024/11024 co-relation queries the response was YES. [2022-11-25 15:33:58,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7730 conditions, 1281 events. 715/1281 cut-off events. For 11024/11024 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6532 event pairs, 154 based on Foata normal form. 1/1281 useless extension candidates. Maximal degree in co-relation 7643. Up to 992 conditions per place. [2022-11-25 15:33:58,702 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 143 selfloop transitions, 74 changer transitions 2/219 dead transitions. [2022-11-25 15:33:58,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 219 transitions, 2954 flow [2022-11-25 15:33:58,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:33:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 15:33:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1261 transitions. [2022-11-25 15:33:58,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30305215092525833 [2022-11-25 15:33:58,706 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1261 transitions. [2022-11-25 15:33:58,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1261 transitions. [2022-11-25 15:33:58,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:33:58,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1261 transitions. [2022-11-25 15:33:58,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.36842105263158) internal successors, (1261), 19 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,714 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,714 INFO L175 Difference]: Start difference. First operand has 165 places, 164 transitions, 2095 flow. Second operand 19 states and 1261 transitions. [2022-11-25 15:33:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 219 transitions, 2954 flow [2022-11-25 15:33:58,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 219 transitions, 2725 flow, removed 90 selfloop flow, removed 11 redundant places. [2022-11-25 15:33:58,760 INFO L231 Difference]: Finished difference. Result has 176 places, 175 transitions, 2268 flow [2022-11-25 15:33:58,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2268, PETRI_PLACES=176, PETRI_TRANSITIONS=175} [2022-11-25 15:33:58,761 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 155 predicate places. [2022-11-25 15:33:58,761 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 175 transitions, 2268 flow [2022-11-25 15:33:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 62.6) internal successors, (1878), 30 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:33:58,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:33:58,761 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:58,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:58,967 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:33:58,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 989149012, now seen corresponding path program 21 times [2022-11-25 15:33:58,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:58,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362984276] [2022-11-25 15:33:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:58,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:59,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362984276] [2022-11-25 15:33:59,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362984276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:59,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598378709] [2022-11-25 15:33:59,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:33:59,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:59,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:59,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 15:34:00,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 15:34:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:34:00,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:00,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:00,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-25 15:34:00,494 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:34:00,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 15:34:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:00,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598378709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:00,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:00,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2022-11-25 15:34:00,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552997143] [2022-11-25 15:34:00,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:00,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 15:34:00,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 15:34:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:34:02,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 219 [2022-11-25 15:34:02,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 175 transitions, 2268 flow. Second operand has 26 states, 26 states have (on average 79.84615384615384) internal successors, (2076), 26 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:02,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:02,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 219 [2022-11-25 15:34:02,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:03,857 INFO L130 PetriNetUnfolder]: 777/1393 cut-off events. [2022-11-25 15:34:03,857 INFO L131 PetriNetUnfolder]: For 14038/14038 co-relation queries the response was YES. [2022-11-25 15:34:03,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 1393 events. 777/1393 cut-off events. For 14038/14038 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7293 event pairs, 237 based on Foata normal form. 2/1394 useless extension candidates. Maximal degree in co-relation 8855. Up to 1247 conditions per place. [2022-11-25 15:34:03,869 INFO L137 encePairwiseOnDemand]: 211/219 looper letters, 170 selfloop transitions, 47 changer transitions 2/219 dead transitions. [2022-11-25 15:34:03,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 219 transitions, 3243 flow [2022-11-25 15:34:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:34:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 15:34:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1408 transitions. [2022-11-25 15:34:03,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3781896320171904 [2022-11-25 15:34:03,872 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1408 transitions. [2022-11-25 15:34:03,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1408 transitions. [2022-11-25 15:34:03,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:03,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1408 transitions. [2022-11-25 15:34:03,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 82.82352941176471) internal successors, (1408), 17 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:03,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:03,881 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 219.0) internal successors, (3942), 18 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:03,881 INFO L175 Difference]: Start difference. First operand has 176 places, 175 transitions, 2268 flow. Second operand 17 states and 1408 transitions. [2022-11-25 15:34:03,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 219 transitions, 3243 flow [2022-11-25 15:34:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 219 transitions, 3077 flow, removed 50 selfloop flow, removed 13 redundant places. [2022-11-25 15:34:03,938 INFO L231 Difference]: Finished difference. Result has 183 places, 185 transitions, 2566 flow [2022-11-25 15:34:03,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2566, PETRI_PLACES=183, PETRI_TRANSITIONS=185} [2022-11-25 15:34:03,938 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2022-11-25 15:34:03,939 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 185 transitions, 2566 flow [2022-11-25 15:34:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 79.84615384615384) internal successors, (2076), 26 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:03,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:03,939 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:03,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:04,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 15:34:04,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:04,140 INFO L85 PathProgramCache]: Analyzing trace with hash 956091568, now seen corresponding path program 22 times [2022-11-25 15:34:04,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:04,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351769737] [2022-11-25 15:34:04,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:04,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:05,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351769737] [2022-11-25 15:34:05,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351769737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993673141] [2022-11-25 15:34:05,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:34:05,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:05,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:05,199 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:05,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 15:34:05,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:34:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 15:34:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:05,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:05,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:05,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-25 15:34:05,843 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:34:05,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 15:34:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:05,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993673141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:05,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:05,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2022-11-25 15:34:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971842648] [2022-11-25 15:34:05,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:05,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 15:34:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 15:34:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:34:07,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:34:07,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 185 transitions, 2566 flow. Second operand has 27 states, 27 states have (on average 77.77777777777777) internal successors, (2100), 27 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:07,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:07,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:34:07,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:09,832 INFO L130 PetriNetUnfolder]: 898/1606 cut-off events. [2022-11-25 15:34:09,832 INFO L131 PetriNetUnfolder]: For 17748/17748 co-relation queries the response was YES. [2022-11-25 15:34:09,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10932 conditions, 1606 events. 898/1606 cut-off events. For 17748/17748 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8662 event pairs, 256 based on Foata normal form. 2/1608 useless extension candidates. Maximal degree in co-relation 10839. Up to 1380 conditions per place. [2022-11-25 15:34:09,848 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 199 selfloop transitions, 72 changer transitions 3/274 dead transitions. [2022-11-25 15:34:09,848 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 274 transitions, 4296 flow [2022-11-25 15:34:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 15:34:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 15:34:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2256 transitions. [2022-11-25 15:34:09,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3679060665362035 [2022-11-25 15:34:09,854 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2256 transitions. [2022-11-25 15:34:09,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2256 transitions. [2022-11-25 15:34:09,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:09,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2256 transitions. [2022-11-25 15:34:09,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 80.57142857142857) internal successors, (2256), 28 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:09,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 219.0) internal successors, (6351), 29 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:09,866 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 219.0) internal successors, (6351), 29 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:09,866 INFO L175 Difference]: Start difference. First operand has 183 places, 185 transitions, 2566 flow. Second operand 28 states and 2256 transitions. [2022-11-25 15:34:09,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 274 transitions, 4296 flow [2022-11-25 15:34:09,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 274 transitions, 3863 flow, removed 188 selfloop flow, removed 9 redundant places. [2022-11-25 15:34:09,938 INFO L231 Difference]: Finished difference. Result has 209 places, 218 transitions, 3206 flow [2022-11-25 15:34:09,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3206, PETRI_PLACES=209, PETRI_TRANSITIONS=218} [2022-11-25 15:34:09,939 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 188 predicate places. [2022-11-25 15:34:09,939 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 218 transitions, 3206 flow [2022-11-25 15:34:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 77.77777777777777) internal successors, (2100), 27 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:09,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:09,940 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:09,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:10,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 15:34:10,146 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -554096430, now seen corresponding path program 23 times [2022-11-25 15:34:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:10,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746931072] [2022-11-25 15:34:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:10,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:10,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746931072] [2022-11-25 15:34:10,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746931072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:10,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75056995] [2022-11-25 15:34:10,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:34:10,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:10,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:10,909 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:10,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 15:34:11,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 15:34:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:11,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:11,389 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:11,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:34:11,462 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:34:11,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:34:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:11,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75056995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:11,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:11,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2022-11-25 15:34:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988256437] [2022-11-25 15:34:11,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:11,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:34:11,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:11,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:34:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:34:12,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 219 [2022-11-25 15:34:12,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 218 transitions, 3206 flow. Second operand has 20 states, 20 states have (on average 87.05) internal successors, (1741), 20 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:12,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:12,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 219 [2022-11-25 15:34:12,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:13,057 INFO L130 PetriNetUnfolder]: 970/1736 cut-off events. [2022-11-25 15:34:13,057 INFO L131 PetriNetUnfolder]: For 20180/20180 co-relation queries the response was YES. [2022-11-25 15:34:13,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 1736 events. 970/1736 cut-off events. For 20180/20180 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9605 event pairs, 292 based on Foata normal form. 2/1738 useless extension candidates. Maximal degree in co-relation 11642. Up to 1582 conditions per place. [2022-11-25 15:34:13,074 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 235 selfloop transitions, 36 changer transitions 2/273 dead transitions. [2022-11-25 15:34:13,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 273 transitions, 4415 flow [2022-11-25 15:34:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:34:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:34:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1449 transitions. [2022-11-25 15:34:13,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.413527397260274 [2022-11-25 15:34:13,082 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1449 transitions. [2022-11-25 15:34:13,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1449 transitions. [2022-11-25 15:34:13,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:13,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1449 transitions. [2022-11-25 15:34:13,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.5625) internal successors, (1449), 16 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:13,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:13,089 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:13,090 INFO L175 Difference]: Start difference. First operand has 209 places, 218 transitions, 3206 flow. Second operand 16 states and 1449 transitions. [2022-11-25 15:34:13,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 273 transitions, 4415 flow [2022-11-25 15:34:13,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 273 transitions, 4037 flow, removed 161 selfloop flow, removed 14 redundant places. [2022-11-25 15:34:13,192 INFO L231 Difference]: Finished difference. Result has 213 places, 231 transitions, 3346 flow [2022-11-25 15:34:13,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3346, PETRI_PLACES=213, PETRI_TRANSITIONS=231} [2022-11-25 15:34:13,193 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2022-11-25 15:34:13,193 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 231 transitions, 3346 flow [2022-11-25 15:34:13,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 87.05) internal successors, (1741), 20 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:13,193 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:13,193 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:13,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 15:34:13,399 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1155055246, now seen corresponding path program 24 times [2022-11-25 15:34:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:13,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328069538] [2022-11-25 15:34:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:13,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:14,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:14,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328069538] [2022-11-25 15:34:14,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328069538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:14,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463621841] [2022-11-25 15:34:14,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:34:14,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:14,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:14,422 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:14,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 15:34:14,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 15:34:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:34:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:14,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:15,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:15,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-25 15:34:15,103 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 15:34:15,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 15:34:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:15,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463621841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:15,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:15,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 23 [2022-11-25 15:34:15,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504395186] [2022-11-25 15:34:15,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:15,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:34:15,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:34:15,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:34:17,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 219 [2022-11-25 15:34:17,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 231 transitions, 3346 flow. Second operand has 25 states, 25 states have (on average 79.92) internal successors, (1998), 25 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:17,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:17,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 219 [2022-11-25 15:34:17,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:18,217 INFO L130 PetriNetUnfolder]: 992/1775 cut-off events. [2022-11-25 15:34:18,217 INFO L131 PetriNetUnfolder]: For 19306/19306 co-relation queries the response was YES. [2022-11-25 15:34:18,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11629 conditions, 1775 events. 992/1775 cut-off events. For 19306/19306 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9841 event pairs, 318 based on Foata normal form. 1/1776 useless extension candidates. Maximal degree in co-relation 11525. Up to 1663 conditions per place. [2022-11-25 15:34:18,235 INFO L137 encePairwiseOnDemand]: 211/219 looper letters, 205 selfloop transitions, 49 changer transitions 1/255 dead transitions. [2022-11-25 15:34:18,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 255 transitions, 4116 flow [2022-11-25 15:34:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:34:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 15:34:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1313 transitions. [2022-11-25 15:34:18,245 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3747146118721461 [2022-11-25 15:34:18,246 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1313 transitions. [2022-11-25 15:34:18,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1313 transitions. [2022-11-25 15:34:18,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:18,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1313 transitions. [2022-11-25 15:34:18,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 82.0625) internal successors, (1313), 16 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,252 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,252 INFO L175 Difference]: Start difference. First operand has 213 places, 231 transitions, 3346 flow. Second operand 16 states and 1313 transitions. [2022-11-25 15:34:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 255 transitions, 4116 flow [2022-11-25 15:34:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 255 transitions, 3735 flow, removed 175 selfloop flow, removed 7 redundant places. [2022-11-25 15:34:18,358 INFO L231 Difference]: Finished difference. Result has 223 places, 235 transitions, 3223 flow [2022-11-25 15:34:18,358 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3223, PETRI_PLACES=223, PETRI_TRANSITIONS=235} [2022-11-25 15:34:18,361 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 202 predicate places. [2022-11-25 15:34:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 235 transitions, 3223 flow [2022-11-25 15:34:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 79.92) internal successors, (1998), 25 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:18,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:18,362 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:18,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:18,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 15:34:18,568 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 474618678, now seen corresponding path program 25 times [2022-11-25 15:34:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956355006] [2022-11-25 15:34:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:18,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:19,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956355006] [2022-11-25 15:34:19,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956355006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64215151] [2022-11-25 15:34:19,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:34:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:19,271 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 15:34:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:19,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-25 15:34:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:19,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:19,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:34:19,861 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:34:19,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:34:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:19,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64215151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:19,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:19,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2022-11-25 15:34:19,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422346161] [2022-11-25 15:34:19,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:19,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 15:34:19,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 15:34:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:34:20,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 219 [2022-11-25 15:34:20,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 235 transitions, 3223 flow. Second operand has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:20,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:20,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 219 [2022-11-25 15:34:20,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:22,267 INFO L130 PetriNetUnfolder]: 1041/1865 cut-off events. [2022-11-25 15:34:22,267 INFO L131 PetriNetUnfolder]: For 19612/19612 co-relation queries the response was YES. [2022-11-25 15:34:22,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11944 conditions, 1865 events. 1041/1865 cut-off events. For 19612/19612 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10489 event pairs, 316 based on Foata normal form. 2/1867 useless extension candidates. Maximal degree in co-relation 11836. Up to 1700 conditions per place. [2022-11-25 15:34:22,283 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 234 selfloop transitions, 51 changer transitions 3/288 dead transitions. [2022-11-25 15:34:22,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 288 transitions, 4365 flow [2022-11-25 15:34:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:34:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 15:34:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1723 transitions. [2022-11-25 15:34:22,287 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39337899543378996 [2022-11-25 15:34:22,287 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1723 transitions. [2022-11-25 15:34:22,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1723 transitions. [2022-11-25 15:34:22,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:22,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1723 transitions. [2022-11-25 15:34:22,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.15) internal successors, (1723), 20 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 219.0) internal successors, (4599), 21 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 219.0) internal successors, (4599), 21 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:22,296 INFO L175 Difference]: Start difference. First operand has 223 places, 235 transitions, 3223 flow. Second operand 20 states and 1723 transitions. [2022-11-25 15:34:22,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 288 transitions, 4365 flow [2022-11-25 15:34:22,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 288 transitions, 4170 flow, removed 69 selfloop flow, removed 11 redundant places. [2022-11-25 15:34:22,373 INFO L231 Difference]: Finished difference. Result has 234 places, 244 transitions, 3444 flow [2022-11-25 15:34:22,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3444, PETRI_PLACES=234, PETRI_TRANSITIONS=244} [2022-11-25 15:34:22,374 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2022-11-25 15:34:22,374 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 244 transitions, 3444 flow [2022-11-25 15:34:22,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 82.96153846153847) internal successors, (2157), 26 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:22,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:22,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:22,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:22,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:22,592 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:22,592 INFO L85 PathProgramCache]: Analyzing trace with hash -646280934, now seen corresponding path program 26 times [2022-11-25 15:34:22,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:22,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248052210] [2022-11-25 15:34:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:22,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248052210] [2022-11-25 15:34:23,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248052210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341746470] [2022-11-25 15:34:23,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:23,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:23,707 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:23,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 15:34:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 15:34:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:24,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:24,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:24,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 61 [2022-11-25 15:34:24,445 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 15:34:24,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 18 [2022-11-25 15:34:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:24,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341746470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:24,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:24,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2022-11-25 15:34:24,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985640267] [2022-11-25 15:34:24,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:24,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 15:34:24,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 15:34:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:34:26,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:34:26,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 244 transitions, 3444 flow. Second operand has 26 states, 26 states have (on average 77.84615384615384) internal successors, (2024), 26 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:26,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:26,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:34:26,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:28,108 INFO L130 PetriNetUnfolder]: 1127/2020 cut-off events. [2022-11-25 15:34:28,108 INFO L131 PetriNetUnfolder]: For 24242/24242 co-relation queries the response was YES. [2022-11-25 15:34:28,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13229 conditions, 2020 events. 1127/2020 cut-off events. For 24242/24242 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11572 event pairs, 341 based on Foata normal form. 2/2022 useless extension candidates. Maximal degree in co-relation 13118. Up to 1811 conditions per place. [2022-11-25 15:34:28,126 INFO L137 encePairwiseOnDemand]: 211/219 looper letters, 243 selfloop transitions, 60 changer transitions 3/306 dead transitions. [2022-11-25 15:34:28,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 306 transitions, 4764 flow [2022-11-25 15:34:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:34:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 15:34:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1622 transitions. [2022-11-25 15:34:28,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37031963470319634 [2022-11-25 15:34:28,132 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1622 transitions. [2022-11-25 15:34:28,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1622 transitions. [2022-11-25 15:34:28,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:28,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1622 transitions. [2022-11-25 15:34:28,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 81.1) internal successors, (1622), 20 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:28,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 219.0) internal successors, (4599), 21 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:28,139 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 219.0) internal successors, (4599), 21 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:28,139 INFO L175 Difference]: Start difference. First operand has 234 places, 244 transitions, 3444 flow. Second operand 20 states and 1622 transitions. [2022-11-25 15:34:28,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 306 transitions, 4764 flow [2022-11-25 15:34:28,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 306 transitions, 4413 flow, removed 119 selfloop flow, removed 16 redundant places. [2022-11-25 15:34:28,252 INFO L231 Difference]: Finished difference. Result has 242 places, 258 transitions, 3689 flow [2022-11-25 15:34:28,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3689, PETRI_PLACES=242, PETRI_TRANSITIONS=258} [2022-11-25 15:34:28,253 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2022-11-25 15:34:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 258 transitions, 3689 flow [2022-11-25 15:34:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.84615384615384) internal successors, (2024), 26 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:28,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:28,253 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:28,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:28,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:28,455 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1595622985, now seen corresponding path program 27 times [2022-11-25 15:34:28,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:28,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981586926] [2022-11-25 15:34:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:28,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:28,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981586926] [2022-11-25 15:34:28,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981586926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244303833] [2022-11-25 15:34:28,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:34:28,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:28,595 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:28,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 15:34:28,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 15:34:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:28,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:34:28,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244303833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:28,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:28,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-25 15:34:28,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781067512] [2022-11-25 15:34:28,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:34:28,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:28,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:34:28,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:34:29,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:34:29,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 258 transitions, 3689 flow. Second operand has 19 states, 19 states have (on average 93.84210526315789) internal successors, (1783), 19 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:29,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:29,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:34:29,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:30,168 INFO L130 PetriNetUnfolder]: 1739/3215 cut-off events. [2022-11-25 15:34:30,169 INFO L131 PetriNetUnfolder]: For 37944/37976 co-relation queries the response was YES. [2022-11-25 15:34:30,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20503 conditions, 3215 events. 1739/3215 cut-off events. For 37944/37976 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21404 event pairs, 372 based on Foata normal form. 152/3351 useless extension candidates. Maximal degree in co-relation 19686. Up to 1225 conditions per place. [2022-11-25 15:34:30,208 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 422 selfloop transitions, 63 changer transitions 0/496 dead transitions. [2022-11-25 15:34:30,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 496 transitions, 8089 flow [2022-11-25 15:34:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:34:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:34:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 975 transitions. [2022-11-25 15:34:30,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452054794520548 [2022-11-25 15:34:30,211 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 975 transitions. [2022-11-25 15:34:30,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 975 transitions. [2022-11-25 15:34:30,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:30,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 975 transitions. [2022-11-25 15:34:30,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.5) internal successors, (975), 10 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,216 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,216 INFO L175 Difference]: Start difference. First operand has 242 places, 258 transitions, 3689 flow. Second operand 10 states and 975 transitions. [2022-11-25 15:34:30,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 496 transitions, 8089 flow [2022-11-25 15:34:30,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 496 transitions, 7428 flow, removed 283 selfloop flow, removed 12 redundant places. [2022-11-25 15:34:30,371 INFO L231 Difference]: Finished difference. Result has 245 places, 318 transitions, 4653 flow [2022-11-25 15:34:30,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4653, PETRI_PLACES=245, PETRI_TRANSITIONS=318} [2022-11-25 15:34:30,372 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2022-11-25 15:34:30,373 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 318 transitions, 4653 flow [2022-11-25 15:34:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 93.84210526315789) internal successors, (1783), 19 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:30,373 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:30,373 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:30,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:30,575 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash -402170240, now seen corresponding path program 28 times [2022-11-25 15:34:30,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:30,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042174944] [2022-11-25 15:34:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:30,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:30,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042174944] [2022-11-25 15:34:30,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042174944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191147152] [2022-11-25 15:34:30,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:34:30,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:30,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:30,719 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:30,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 15:34:30,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:34:30,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:31,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:31,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191147152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:31,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:31,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-25 15:34:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269101925] [2022-11-25 15:34:31,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:31,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 15:34:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 15:34:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:34:31,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:34:31,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 318 transitions, 4653 flow. Second operand has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:31,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:31,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:34:31,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:32,334 INFO L130 PetriNetUnfolder]: 1479/2843 cut-off events. [2022-11-25 15:34:32,335 INFO L131 PetriNetUnfolder]: For 22657/22674 co-relation queries the response was YES. [2022-11-25 15:34:32,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17954 conditions, 2843 events. 1479/2843 cut-off events. For 22657/22674 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19217 event pairs, 367 based on Foata normal form. 159/3002 useless extension candidates. Maximal degree in co-relation 17442. Up to 1194 conditions per place. [2022-11-25 15:34:32,362 INFO L137 encePairwiseOnDemand]: 213/219 looper letters, 320 selfloop transitions, 5 changer transitions 127/457 dead transitions. [2022-11-25 15:34:32,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 457 transitions, 7151 flow [2022-11-25 15:34:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:34:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 15:34:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 974 transitions. [2022-11-25 15:34:32,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44474885844748857 [2022-11-25 15:34:32,364 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 974 transitions. [2022-11-25 15:34:32,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 974 transitions. [2022-11-25 15:34:32,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:32,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 974 transitions. [2022-11-25 15:34:32,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.4) internal successors, (974), 10 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:32,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:32,369 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:32,370 INFO L175 Difference]: Start difference. First operand has 245 places, 318 transitions, 4653 flow. Second operand 10 states and 974 transitions. [2022-11-25 15:34:32,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 457 transitions, 7151 flow [2022-11-25 15:34:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 457 transitions, 7097 flow, removed 25 selfloop flow, removed 2 redundant places. [2022-11-25 15:34:32,545 INFO L231 Difference]: Finished difference. Result has 256 places, 259 transitions, 3699 flow [2022-11-25 15:34:32,546 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=4505, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3699, PETRI_PLACES=256, PETRI_TRANSITIONS=259} [2022-11-25 15:34:32,546 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2022-11-25 15:34:32,546 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 259 transitions, 3699 flow [2022-11-25 15:34:32,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:32,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:32,547 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:32,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:32,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:32,750 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -861876731, now seen corresponding path program 29 times [2022-11-25 15:34:32,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129320416] [2022-11-25 15:34:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:32,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:32,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129320416] [2022-11-25 15:34:32,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129320416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:32,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194175273] [2022-11-25 15:34:32,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:34:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:32,908 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:32,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 15:34:33,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:34:33,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:34:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:33,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:33,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194175273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:33,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:33,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-25 15:34:33,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576872940] [2022-11-25 15:34:33,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:33,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:34:33,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:34:33,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:34:33,468 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 219 [2022-11-25 15:34:33,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 259 transitions, 3699 flow. Second operand has 17 states, 17 states have (on average 90.3529411764706) internal successors, (1536), 17 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:33,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:33,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 219 [2022-11-25 15:34:33,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:34,429 INFO L130 PetriNetUnfolder]: 892/1582 cut-off events. [2022-11-25 15:34:34,430 INFO L131 PetriNetUnfolder]: For 18164/18164 co-relation queries the response was YES. [2022-11-25 15:34:34,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11207 conditions, 1582 events. 892/1582 cut-off events. For 18164/18164 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8414 event pairs, 88 based on Foata normal form. 196/1778 useless extension candidates. Maximal degree in co-relation 11073. Up to 806 conditions per place. [2022-11-25 15:34:34,448 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 143 selfloop transitions, 156 changer transitions 0/299 dead transitions. [2022-11-25 15:34:34,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 299 transitions, 4878 flow [2022-11-25 15:34:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 15:34:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 15:34:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1937 transitions. [2022-11-25 15:34:34,451 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.421178517068928 [2022-11-25 15:34:34,451 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1937 transitions. [2022-11-25 15:34:34,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1937 transitions. [2022-11-25 15:34:34,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:34,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1937 transitions. [2022-11-25 15:34:34,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.23809523809524) internal successors, (1937), 21 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:34,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:34,459 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:34,459 INFO L175 Difference]: Start difference. First operand has 256 places, 259 transitions, 3699 flow. Second operand 21 states and 1937 transitions. [2022-11-25 15:34:34,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 299 transitions, 4878 flow [2022-11-25 15:34:34,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 299 transitions, 4166 flow, removed 324 selfloop flow, removed 24 redundant places. [2022-11-25 15:34:34,555 INFO L231 Difference]: Finished difference. Result has 248 places, 261 transitions, 3501 flow [2022-11-25 15:34:34,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3501, PETRI_PLACES=248, PETRI_TRANSITIONS=261} [2022-11-25 15:34:34,556 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2022-11-25 15:34:34,556 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 261 transitions, 3501 flow [2022-11-25 15:34:34,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.3529411764706) internal successors, (1536), 17 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:34,557 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:34,557 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:34,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:34,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:34,759 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:34,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:34,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1485050904, now seen corresponding path program 30 times [2022-11-25 15:34:34,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:34,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524038670] [2022-11-25 15:34:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:34,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524038670] [2022-11-25 15:34:34,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524038670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347462275] [2022-11-25 15:34:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:34:34,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:34,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:34,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 15:34:35,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:34:35,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:34:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:35,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347462275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:35,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:35,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-25 15:34:35,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126790639] [2022-11-25 15:34:35,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:35,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:34:35,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:34:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:34:35,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 219 [2022-11-25 15:34:35,669 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 261 transitions, 3501 flow. Second operand has 20 states, 20 states have (on average 93.7) internal successors, (1874), 20 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:35,669 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:35,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 219 [2022-11-25 15:34:35,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:36,188 INFO L130 PetriNetUnfolder]: 656/1148 cut-off events. [2022-11-25 15:34:36,188 INFO L131 PetriNetUnfolder]: For 14356/14364 co-relation queries the response was YES. [2022-11-25 15:34:36,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8779 conditions, 1148 events. 656/1148 cut-off events. For 14356/14364 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5449 event pairs, 190 based on Foata normal form. 102/1242 useless extension candidates. Maximal degree in co-relation 8662. Up to 710 conditions per place. [2022-11-25 15:34:36,200 INFO L137 encePairwiseOnDemand]: 214/219 looper letters, 162 selfloop transitions, 102 changer transitions 0/275 dead transitions. [2022-11-25 15:34:36,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 275 transitions, 4344 flow [2022-11-25 15:34:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:34:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 15:34:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 866 transitions. [2022-11-25 15:34:36,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4393708777270421 [2022-11-25 15:34:36,205 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 866 transitions. [2022-11-25 15:34:36,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 866 transitions. [2022-11-25 15:34:36,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:36,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 866 transitions. [2022-11-25 15:34:36,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:36,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:36,209 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:36,210 INFO L175 Difference]: Start difference. First operand has 248 places, 261 transitions, 3501 flow. Second operand 9 states and 866 transitions. [2022-11-25 15:34:36,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 275 transitions, 4344 flow [2022-11-25 15:34:36,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 275 transitions, 3607 flow, removed 160 selfloop flow, removed 29 redundant places. [2022-11-25 15:34:36,302 INFO L231 Difference]: Finished difference. Result has 228 places, 263 transitions, 3114 flow [2022-11-25 15:34:36,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3114, PETRI_PLACES=228, PETRI_TRANSITIONS=263} [2022-11-25 15:34:36,303 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2022-11-25 15:34:36,303 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 263 transitions, 3114 flow [2022-11-25 15:34:36,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 93.7) internal successors, (1874), 20 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:36,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:36,304 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:36,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:36,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 15:34:36,511 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:36,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1991416361, now seen corresponding path program 31 times [2022-11-25 15:34:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:36,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897552888] [2022-11-25 15:34:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897552888] [2022-11-25 15:34:38,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897552888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:38,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54209963] [2022-11-25 15:34:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:34:38,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:38,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:38,408 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:38,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 15:34:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 15:34:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:34:39,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:39,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:39,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-25 15:34:39,731 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:34:39,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:34:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:34:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54209963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:39,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:39,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2022-11-25 15:34:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607381806] [2022-11-25 15:34:39,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 15:34:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 15:34:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 15:34:42,678 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 219 [2022-11-25 15:34:42,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 263 transitions, 3114 flow. Second operand has 35 states, 35 states have (on average 79.74285714285715) internal successors, (2791), 35 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:42,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:42,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 219 [2022-11-25 15:34:42,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:34:44,806 INFO L130 PetriNetUnfolder]: 750/1309 cut-off events. [2022-11-25 15:34:44,806 INFO L131 PetriNetUnfolder]: For 17098/17098 co-relation queries the response was YES. [2022-11-25 15:34:44,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 1309 events. 750/1309 cut-off events. For 17098/17098 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6304 event pairs, 125 based on Foata normal form. 1/1310 useless extension candidates. Maximal degree in co-relation 9668. Up to 1026 conditions per place. [2022-11-25 15:34:44,819 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 209 selfloop transitions, 131 changer transitions 1/341 dead transitions. [2022-11-25 15:34:44,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 341 transitions, 4623 flow [2022-11-25 15:34:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 15:34:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 15:34:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2468 transitions. [2022-11-25 15:34:44,831 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3756468797564688 [2022-11-25 15:34:44,831 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2468 transitions. [2022-11-25 15:34:44,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2468 transitions. [2022-11-25 15:34:44,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:34:44,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2468 transitions. [2022-11-25 15:34:44,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 82.26666666666667) internal successors, (2468), 30 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:44,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 219.0) internal successors, (6789), 31 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:44,844 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 219.0) internal successors, (6789), 31 states have internal predecessors, (6789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:44,844 INFO L175 Difference]: Start difference. First operand has 228 places, 263 transitions, 3114 flow. Second operand 30 states and 2468 transitions. [2022-11-25 15:34:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 341 transitions, 4623 flow [2022-11-25 15:34:44,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 341 transitions, 4411 flow, removed 30 selfloop flow, removed 8 redundant places. [2022-11-25 15:34:44,936 INFO L231 Difference]: Finished difference. Result has 256 places, 296 transitions, 3796 flow [2022-11-25 15:34:44,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3796, PETRI_PLACES=256, PETRI_TRANSITIONS=296} [2022-11-25 15:34:44,937 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2022-11-25 15:34:44,937 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 296 transitions, 3796 flow [2022-11-25 15:34:44,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.74285714285715) internal successors, (2791), 35 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:44,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:34:44,938 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 15:34:45,145 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:34:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -404676019, now seen corresponding path program 32 times [2022-11-25 15:34:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794581159] [2022-11-25 15:34:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:46,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:46,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794581159] [2022-11-25 15:34:46,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794581159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:46,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596824083] [2022-11-25 15:34:46,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:34:46,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:46,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:46,599 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:46,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 15:34:46,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:34:46,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:34:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:34:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:47,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:47,444 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 15 treesize of output 16 [2022-11-25 15:34:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:47,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:48,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:48,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 138 [2022-11-25 15:34:49,439 INFO L321 Elim1Store]: treesize reduction 56, result has 55.9 percent of original size [2022-11-25 15:34:49,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 81 [2022-11-25 15:34:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:49,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596824083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:49,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:49,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-25 15:34:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940727669] [2022-11-25 15:34:49,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:49,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:34:49,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:34:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:34:56,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:34:56,902 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 296 transitions, 3796 flow. Second operand has 43 states, 43 states have (on average 77.46511627906976) internal successors, (3331), 43 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:34:56,902 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:34:56,902 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:34:56,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:03,516 INFO L130 PetriNetUnfolder]: 930/1625 cut-off events. [2022-11-25 15:35:03,516 INFO L131 PetriNetUnfolder]: For 23923/23923 co-relation queries the response was YES. [2022-11-25 15:35:03,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13227 conditions, 1625 events. 930/1625 cut-off events. For 23923/23923 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8295 event pairs, 128 based on Foata normal form. 2/1627 useless extension candidates. Maximal degree in co-relation 12942. Up to 1150 conditions per place. [2022-11-25 15:35:03,589 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 232 selfloop transitions, 228 changer transitions 3/463 dead transitions. [2022-11-25 15:35:03,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 463 transitions, 7115 flow [2022-11-25 15:35:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 15:35:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-25 15:35:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3998 transitions. [2022-11-25 15:35:03,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36511415525114155 [2022-11-25 15:35:03,596 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3998 transitions. [2022-11-25 15:35:03,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3998 transitions. [2022-11-25 15:35:03,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:03,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3998 transitions. [2022-11-25 15:35:03,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 79.96) internal successors, (3998), 50 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:03,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 219.0) internal successors, (11169), 51 states have internal predecessors, (11169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:03,617 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 219.0) internal successors, (11169), 51 states have internal predecessors, (11169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:03,617 INFO L175 Difference]: Start difference. First operand has 256 places, 296 transitions, 3796 flow. Second operand 50 states and 3998 transitions. [2022-11-25 15:35:03,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 463 transitions, 7115 flow [2022-11-25 15:35:03,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 463 transitions, 6480 flow, removed 194 selfloop flow, removed 17 redundant places. [2022-11-25 15:35:03,739 INFO L231 Difference]: Finished difference. Result has 297 places, 391 transitions, 5673 flow [2022-11-25 15:35:03,739 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=5673, PETRI_PLACES=297, PETRI_TRANSITIONS=391} [2022-11-25 15:35:03,740 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 276 predicate places. [2022-11-25 15:35:03,740 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 391 transitions, 5673 flow [2022-11-25 15:35:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.46511627906976) internal successors, (3331), 43 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:03,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:03,741 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:03,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:03,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 15:35:03,948 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 270086609, now seen corresponding path program 33 times [2022-11-25 15:35:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375481121] [2022-11-25 15:35:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:03,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:05,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375481121] [2022-11-25 15:35:05,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375481121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999382268] [2022-11-25 15:35:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:35:05,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:05,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:05,485 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:05,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 15:35:05,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:35:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:05,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-25 15:35:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:05,929 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 15 treesize of output 11 [2022-11-25 15:35:05,982 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 [2022-11-25 15:35:06,023 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 [2022-11-25 15:35:06,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:06,328 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 17 treesize of output 18 [2022-11-25 15:35:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:06,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:35:07,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999382268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:07,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:07,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2022-11-25 15:35:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617319938] [2022-11-25 15:35:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:35:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:35:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 15:35:10,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:35:10,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 391 transitions, 5673 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:10,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:10,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:35:10,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:14,925 INFO L130 PetriNetUnfolder]: 1010/1768 cut-off events. [2022-11-25 15:35:14,925 INFO L131 PetriNetUnfolder]: For 27422/27422 co-relation queries the response was YES. [2022-11-25 15:35:14,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14856 conditions, 1768 events. 1010/1768 cut-off events. For 27422/27422 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9262 event pairs, 155 based on Foata normal form. 1/1769 useless extension candidates. Maximal degree in co-relation 14541. Up to 1267 conditions per place. [2022-11-25 15:35:14,942 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 242 selfloop transitions, 226 changer transitions 2/470 dead transitions. [2022-11-25 15:35:14,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 470 transitions, 7762 flow [2022-11-25 15:35:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 15:35:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-25 15:35:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3271 transitions. [2022-11-25 15:35:14,947 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36429446486245687 [2022-11-25 15:35:14,947 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3271 transitions. [2022-11-25 15:35:14,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3271 transitions. [2022-11-25 15:35:14,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:14,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3271 transitions. [2022-11-25 15:35:14,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.78048780487805) internal successors, (3271), 41 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 219.0) internal successors, (9198), 42 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:14,960 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 219.0) internal successors, (9198), 42 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:14,960 INFO L175 Difference]: Start difference. First operand has 297 places, 391 transitions, 5673 flow. Second operand 41 states and 3271 transitions. [2022-11-25 15:35:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 470 transitions, 7762 flow [2022-11-25 15:35:15,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 470 transitions, 7161 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-11-25 15:35:15,096 INFO L231 Difference]: Finished difference. Result has 328 places, 415 transitions, 6331 flow [2022-11-25 15:35:15,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=5094, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6331, PETRI_PLACES=328, PETRI_TRANSITIONS=415} [2022-11-25 15:35:15,097 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 307 predicate places. [2022-11-25 15:35:15,097 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 415 transitions, 6331 flow [2022-11-25 15:35:15,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:15,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:15,097 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:15,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:15,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 15:35:15,298 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2060949673, now seen corresponding path program 34 times [2022-11-25 15:35:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:15,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778232235] [2022-11-25 15:35:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778232235] [2022-11-25 15:35:16,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778232235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206105927] [2022-11-25 15:35:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:35:16,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:16,748 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 15:35:16,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:35:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:16,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:35:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:35:17,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:17,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-11-25 15:35:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:17,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:18,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:18,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 147 [2022-11-25 15:35:19,959 INFO L321 Elim1Store]: treesize reduction 62, result has 54.7 percent of original size [2022-11-25 15:35:19,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 86 [2022-11-25 15:35:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:20,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206105927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:20,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:20,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-25 15:35:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206089458] [2022-11-25 15:35:20,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:20,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:35:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:35:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:35:28,384 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:35:28,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 415 transitions, 6331 flow. Second operand has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:28,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:28,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:35:28,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:33,589 INFO L130 PetriNetUnfolder]: 1100/1985 cut-off events. [2022-11-25 15:35:33,589 INFO L131 PetriNetUnfolder]: For 30231/30231 co-relation queries the response was YES. [2022-11-25 15:35:33,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16781 conditions, 1985 events. 1100/1985 cut-off events. For 30231/30231 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11047 event pairs, 76 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 16530. Up to 1230 conditions per place. [2022-11-25 15:35:33,624 INFO L137 encePairwiseOnDemand]: 207/219 looper letters, 313 selfloop transitions, 252 changer transitions 10/575 dead transitions. [2022-11-25 15:35:33,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 575 transitions, 9482 flow [2022-11-25 15:35:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 15:35:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 15:35:33,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4245 transitions. [2022-11-25 15:35:33,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36572757818557766 [2022-11-25 15:35:33,631 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4245 transitions. [2022-11-25 15:35:33,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4245 transitions. [2022-11-25 15:35:33,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:33,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4245 transitions. [2022-11-25 15:35:33,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 80.09433962264151) internal successors, (4245), 53 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:33,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 219.0) internal successors, (11826), 54 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:33,651 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 219.0) internal successors, (11826), 54 states have internal predecessors, (11826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:33,651 INFO L175 Difference]: Start difference. First operand has 328 places, 415 transitions, 6331 flow. Second operand 53 states and 4245 transitions. [2022-11-25 15:35:33,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 575 transitions, 9482 flow [2022-11-25 15:35:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 575 transitions, 8571 flow, removed 335 selfloop flow, removed 26 redundant places. [2022-11-25 15:35:33,822 INFO L231 Difference]: Finished difference. Result has 359 places, 481 transitions, 7495 flow [2022-11-25 15:35:33,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=5620, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=7495, PETRI_PLACES=359, PETRI_TRANSITIONS=481} [2022-11-25 15:35:33,823 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2022-11-25 15:35:33,823 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 481 transitions, 7495 flow [2022-11-25 15:35:33,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.51162790697674) internal successors, (3333), 43 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:33,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:33,824 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:33,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:34,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 15:35:34,026 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:34,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1962574829, now seen corresponding path program 35 times [2022-11-25 15:35:34,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:34,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59783072] [2022-11-25 15:35:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:34,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59783072] [2022-11-25 15:35:35,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59783072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:35,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660090278] [2022-11-25 15:35:35,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:35:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:35,363 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 15:35:35,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:35:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 15:35:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:35,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:36,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:36,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-25 15:35:36,558 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:35:36,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:35:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:35:36,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660090278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:36,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:36,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2022-11-25 15:35:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933441477] [2022-11-25 15:35:36,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 15:35:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 15:35:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 15:35:39,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:35:39,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 481 transitions, 7495 flow. Second operand has 35 states, 35 states have (on average 78.74285714285715) internal successors, (2756), 35 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:39,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:39,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:35:39,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:42,091 INFO L130 PetriNetUnfolder]: 1181/2127 cut-off events. [2022-11-25 15:35:42,091 INFO L131 PetriNetUnfolder]: For 35749/35749 co-relation queries the response was YES. [2022-11-25 15:35:42,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18763 conditions, 2127 events. 1181/2127 cut-off events. For 35749/35749 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11922 event pairs, 184 based on Foata normal form. 2/2129 useless extension candidates. Maximal degree in co-relation 18583. Up to 1687 conditions per place. [2022-11-25 15:35:42,118 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 352 selfloop transitions, 199 changer transitions 2/553 dead transitions. [2022-11-25 15:35:42,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 553 transitions, 9833 flow [2022-11-25 15:35:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:35:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:35:42,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1965 transitions. [2022-11-25 15:35:42,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3738584474885845 [2022-11-25 15:35:42,120 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1965 transitions. [2022-11-25 15:35:42,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1965 transitions. [2022-11-25 15:35:42,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:42,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1965 transitions. [2022-11-25 15:35:42,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 81.875) internal successors, (1965), 24 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:42,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 219.0) internal successors, (5475), 25 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:42,126 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 219.0) internal successors, (5475), 25 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:42,126 INFO L175 Difference]: Start difference. First operand has 359 places, 481 transitions, 7495 flow. Second operand 24 states and 1965 transitions. [2022-11-25 15:35:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 553 transitions, 9833 flow [2022-11-25 15:35:42,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 553 transitions, 9071 flow, removed 235 selfloop flow, removed 39 redundant places. [2022-11-25 15:35:42,309 INFO L231 Difference]: Finished difference. Result has 347 places, 505 transitions, 8107 flow [2022-11-25 15:35:42,309 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8107, PETRI_PLACES=347, PETRI_TRANSITIONS=505} [2022-11-25 15:35:42,309 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2022-11-25 15:35:42,310 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 505 transitions, 8107 flow [2022-11-25 15:35:42,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.74285714285715) internal successors, (2756), 35 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:42,310 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:42,310 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:42,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:42,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 15:35:42,511 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2111035605, now seen corresponding path program 36 times [2022-11-25 15:35:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491827196] [2022-11-25 15:35:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:43,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:43,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491827196] [2022-11-25 15:35:43,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491827196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311441373] [2022-11-25 15:35:43,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:35:43,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:43,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:43,993 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:43,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 15:35:44,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:35:44,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:35:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:35:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:35:44,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:44,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-11-25 15:35:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:44,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:45,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:35:45,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 130 [2022-11-25 15:35:46,616 INFO L321 Elim1Store]: treesize reduction 58, result has 51.3 percent of original size [2022-11-25 15:35:46,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2022-11-25 15:35:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:47,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311441373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:35:47,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:35:47,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-25 15:35:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261460201] [2022-11-25 15:35:47,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 15:35:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 15:35:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:35:53,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:35:53,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 505 transitions, 8107 flow. Second operand has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:53,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:35:53,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:35:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:35:57,648 INFO L130 PetriNetUnfolder]: 1483/2748 cut-off events. [2022-11-25 15:35:57,648 INFO L131 PetriNetUnfolder]: For 52532/52532 co-relation queries the response was YES. [2022-11-25 15:35:57,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 2748 events. 1483/2748 cut-off events. For 52532/52532 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17048 event pairs, 31 based on Foata normal form. 4/2752 useless extension candidates. Maximal degree in co-relation 23772. Up to 1622 conditions per place. [2022-11-25 15:35:57,683 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 373 selfloop transitions, 337 changer transitions 5/715 dead transitions. [2022-11-25 15:35:57,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 715 transitions, 12960 flow [2022-11-25 15:35:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:35:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 15:35:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3016 transitions. [2022-11-25 15:35:57,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3722078242626188 [2022-11-25 15:35:57,688 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3016 transitions. [2022-11-25 15:35:57,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3016 transitions. [2022-11-25 15:35:57,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:35:57,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3016 transitions. [2022-11-25 15:35:57,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 81.51351351351352) internal successors, (3016), 37 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:57,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:57,702 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:57,702 INFO L175 Difference]: Start difference. First operand has 347 places, 505 transitions, 8107 flow. Second operand 37 states and 3016 transitions. [2022-11-25 15:35:57,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 715 transitions, 12960 flow [2022-11-25 15:35:57,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 715 transitions, 12015 flow, removed 358 selfloop flow, removed 15 redundant places. [2022-11-25 15:35:57,973 INFO L231 Difference]: Finished difference. Result has 371 places, 642 transitions, 10762 flow [2022-11-25 15:35:57,974 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10762, PETRI_PLACES=371, PETRI_TRANSITIONS=642} [2022-11-25 15:35:57,974 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2022-11-25 15:35:57,974 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 642 transitions, 10762 flow [2022-11-25 15:35:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:35:57,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:35:57,975 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:57,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:58,176 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:35:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -556216909, now seen corresponding path program 37 times [2022-11-25 15:35:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826595025] [2022-11-25 15:35:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:35:59,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826595025] [2022-11-25 15:35:59,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826595025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351704198] [2022-11-25 15:35:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:35:59,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:59,794 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:59,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-25 15:36:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 15:36:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:36:00,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:00,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:00,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-25 15:36:01,182 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:36:01,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:36:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:36:01,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351704198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:01,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:01,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2022-11-25 15:36:01,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465137634] [2022-11-25 15:36:01,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:01,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:36:01,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:01,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:36:01,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:36:04,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:36:04,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 642 transitions, 10762 flow. Second operand has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:04,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:04,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:36:04,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:08,906 INFO L130 PetriNetUnfolder]: 1715/3196 cut-off events. [2022-11-25 15:36:08,907 INFO L131 PetriNetUnfolder]: For 70331/70331 co-relation queries the response was YES. [2022-11-25 15:36:08,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29543 conditions, 3196 events. 1715/3196 cut-off events. For 70331/70331 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20588 event pairs, 246 based on Foata normal form. 4/3200 useless extension candidates. Maximal degree in co-relation 29049. Up to 2467 conditions per place. [2022-11-25 15:36:08,954 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 533 selfloop transitions, 252 changer transitions 2/787 dead transitions. [2022-11-25 15:36:08,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 787 transitions, 15216 flow [2022-11-25 15:36:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 15:36:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 15:36:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3100 transitions. [2022-11-25 15:36:08,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37250660898822396 [2022-11-25 15:36:08,959 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3100 transitions. [2022-11-25 15:36:08,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3100 transitions. [2022-11-25 15:36:08,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:08,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3100 transitions. [2022-11-25 15:36:08,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 81.57894736842105) internal successors, (3100), 38 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:08,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 219.0) internal successors, (8541), 39 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:08,972 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 219.0) internal successors, (8541), 39 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:08,972 INFO L175 Difference]: Start difference. First operand has 371 places, 642 transitions, 10762 flow. Second operand 38 states and 3100 transitions. [2022-11-25 15:36:08,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 787 transitions, 15216 flow [2022-11-25 15:36:09,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 787 transitions, 14603 flow, removed 228 selfloop flow, removed 19 redundant places. [2022-11-25 15:36:09,315 INFO L231 Difference]: Finished difference. Result has 394 places, 704 transitions, 12955 flow [2022-11-25 15:36:09,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=10281, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12955, PETRI_PLACES=394, PETRI_TRANSITIONS=704} [2022-11-25 15:36:09,316 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 373 predicate places. [2022-11-25 15:36:09,316 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 704 transitions, 12955 flow [2022-11-25 15:36:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:09,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:09,317 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:09,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:09,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:09,523 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash -550865095, now seen corresponding path program 38 times [2022-11-25 15:36:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191742882] [2022-11-25 15:36:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:09,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:11,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191742882] [2022-11-25 15:36:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191742882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084691130] [2022-11-25 15:36:11,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:36:11,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:11,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:11,081 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 15:36:11,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:36:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:11,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:36:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:11,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:11,834 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 15 treesize of output 16 [2022-11-25 15:36:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:11,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:12,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:12,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 130 [2022-11-25 15:36:13,774 INFO L321 Elim1Store]: treesize reduction 58, result has 51.3 percent of original size [2022-11-25 15:36:13,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2022-11-25 15:36:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084691130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:14,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:14,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-25 15:36:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790795730] [2022-11-25 15:36:14,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:14,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:36:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:36:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:36:22,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:36:22,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 704 transitions, 12955 flow. Second operand has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:22,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:22,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:36:22,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:31,992 INFO L130 PetriNetUnfolder]: 1813/3387 cut-off events. [2022-11-25 15:36:31,992 INFO L131 PetriNetUnfolder]: For 72750/72750 co-relation queries the response was YES. [2022-11-25 15:36:32,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31560 conditions, 3387 events. 1813/3387 cut-off events. For 72750/72750 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22316 event pairs, 237 based on Foata normal form. 3/3390 useless extension candidates. Maximal degree in co-relation 31036. Up to 2794 conditions per place. [2022-11-25 15:36:32,034 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 547 selfloop transitions, 272 changer transitions 5/824 dead transitions. [2022-11-25 15:36:32,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 824 transitions, 16320 flow [2022-11-25 15:36:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-25 15:36:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-25 15:36:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4395 transitions. [2022-11-25 15:36:32,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36488169364881695 [2022-11-25 15:36:32,040 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4395 transitions. [2022-11-25 15:36:32,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4395 transitions. [2022-11-25 15:36:32,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:32,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4395 transitions. [2022-11-25 15:36:32,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 79.9090909090909) internal successors, (4395), 55 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 219.0) internal successors, (12264), 56 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,055 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 219.0) internal successors, (12264), 56 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,055 INFO L175 Difference]: Start difference. First operand has 394 places, 704 transitions, 12955 flow. Second operand 55 states and 4395 transitions. [2022-11-25 15:36:32,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 824 transitions, 16320 flow [2022-11-25 15:36:32,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 824 transitions, 14586 flow, removed 777 selfloop flow, removed 23 redundant places. [2022-11-25 15:36:32,420 INFO L231 Difference]: Finished difference. Result has 429 places, 738 transitions, 12956 flow [2022-11-25 15:36:32,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=11655, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=12956, PETRI_PLACES=429, PETRI_TRANSITIONS=738} [2022-11-25 15:36:32,421 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2022-11-25 15:36:32,421 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 738 transitions, 12956 flow [2022-11-25 15:36:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:32,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:32,422 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:32,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-25 15:36:32,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 15:36:32,623 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash -193882061, now seen corresponding path program 39 times [2022-11-25 15:36:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:32,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146075522] [2022-11-25 15:36:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146075522] [2022-11-25 15:36:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146075522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713780895] [2022-11-25 15:36:34,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:36:34,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:34,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:34,171 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:34,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 15:36:34,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:36:34,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:34,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-25 15:36:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:34,501 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 15 treesize of output 11 [2022-11-25 15:36:34,544 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 [2022-11-25 15:36:34,592 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 [2022-11-25 15:36:34,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:34,925 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 17 treesize of output 18 [2022-11-25 15:36:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:36:35,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713780895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:35,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:35,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2022-11-25 15:36:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183480321] [2022-11-25 15:36:35,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:35,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:36:35,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:36:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 15:36:39,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:36:39,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 738 transitions, 12956 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:39,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:39,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:36:39,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:36:44,985 INFO L130 PetriNetUnfolder]: 1925/3606 cut-off events. [2022-11-25 15:36:44,986 INFO L131 PetriNetUnfolder]: For 73973/73973 co-relation queries the response was YES. [2022-11-25 15:36:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33395 conditions, 3606 events. 1925/3606 cut-off events. For 73973/73973 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 23963 event pairs, 255 based on Foata normal form. 3/3609 useless extension candidates. Maximal degree in co-relation 32796. Up to 2938 conditions per place. [2022-11-25 15:36:45,038 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 553 selfloop transitions, 270 changer transitions 7/830 dead transitions. [2022-11-25 15:36:45,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 830 transitions, 16694 flow [2022-11-25 15:36:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:36:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 15:36:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2961 transitions. [2022-11-25 15:36:45,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36542021473528324 [2022-11-25 15:36:45,041 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2961 transitions. [2022-11-25 15:36:45,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2961 transitions. [2022-11-25 15:36:45,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:36:45,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2961 transitions. [2022-11-25 15:36:45,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.02702702702703) internal successors, (2961), 37 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:45,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:45,055 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:45,055 INFO L175 Difference]: Start difference. First operand has 429 places, 738 transitions, 12956 flow. Second operand 37 states and 2961 transitions. [2022-11-25 15:36:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 830 transitions, 16694 flow [2022-11-25 15:36:45,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 830 transitions, 16154 flow, removed 88 selfloop flow, removed 38 redundant places. [2022-11-25 15:36:45,520 INFO L231 Difference]: Finished difference. Result has 433 places, 776 transitions, 14700 flow [2022-11-25 15:36:45,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=12432, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14700, PETRI_PLACES=433, PETRI_TRANSITIONS=776} [2022-11-25 15:36:45,521 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 412 predicate places. [2022-11-25 15:36:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 776 transitions, 14700 flow [2022-11-25 15:36:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:45,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:36:45,523 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:45,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 15:36:45,730 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:36:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1707508625, now seen corresponding path program 40 times [2022-11-25 15:36:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:45,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546456778] [2022-11-25 15:36:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:47,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546456778] [2022-11-25 15:36:47,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546456778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:47,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342340867] [2022-11-25 15:36:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:36:47,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:47,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:47,540 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:47,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-25 15:36:47,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:36:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:36:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:36:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:48,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:48,179 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 15 treesize of output 16 [2022-11-25 15:36:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:48,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:49,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:36:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 158 [2022-11-25 15:36:50,003 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-11-25 15:36:50,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 89 [2022-11-25 15:36:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:50,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342340867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:50,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:50,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2022-11-25 15:36:50,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867317978] [2022-11-25 15:36:50,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:50,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:36:50,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:36:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:36:55,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:36:55,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 776 transitions, 14700 flow. Second operand has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:36:55,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:36:55,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:36:55,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:01,651 INFO L130 PetriNetUnfolder]: 2036/3809 cut-off events. [2022-11-25 15:37:01,651 INFO L131 PetriNetUnfolder]: For 97675/97675 co-relation queries the response was YES. [2022-11-25 15:37:01,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37888 conditions, 3809 events. 2036/3809 cut-off events. For 97675/97675 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25676 event pairs, 264 based on Foata normal form. 3/3812 useless extension candidates. Maximal degree in co-relation 37315. Up to 3231 conditions per place. [2022-11-25 15:37:01,716 INFO L137 encePairwiseOnDemand]: 207/219 looper letters, 606 selfloop transitions, 270 changer transitions 5/881 dead transitions. [2022-11-25 15:37:01,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 881 transitions, 18596 flow [2022-11-25 15:37:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:37:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 15:37:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2973 transitions. [2022-11-25 15:37:01,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36690114772306553 [2022-11-25 15:37:01,720 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2973 transitions. [2022-11-25 15:37:01,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2973 transitions. [2022-11-25 15:37:01,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:01,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2973 transitions. [2022-11-25 15:37:01,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.35135135135135) internal successors, (2973), 37 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:01,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:01,733 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:01,734 INFO L175 Difference]: Start difference. First operand has 433 places, 776 transitions, 14700 flow. Second operand 37 states and 2973 transitions. [2022-11-25 15:37:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 881 transitions, 18596 flow [2022-11-25 15:37:02,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 881 transitions, 17488 flow, removed 459 selfloop flow, removed 23 redundant places. [2022-11-25 15:37:02,359 INFO L231 Difference]: Finished difference. Result has 451 places, 820 transitions, 16008 flow [2022-11-25 15:37:02,360 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=13622, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16008, PETRI_PLACES=451, PETRI_TRANSITIONS=820} [2022-11-25 15:37:02,361 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 430 predicate places. [2022-11-25 15:37:02,361 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 820 transitions, 16008 flow [2022-11-25 15:37:02,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 77.4186046511628) internal successors, (3329), 43 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:02,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:02,362 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:02,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:02,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 15:37:02,569 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1732152017, now seen corresponding path program 41 times [2022-11-25 15:37:02,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:02,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785178412] [2022-11-25 15:37:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:02,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:03,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785178412] [2022-11-25 15:37:03,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785178412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:03,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861022702] [2022-11-25 15:37:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:37:03,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:03,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:03,491 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:03,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 15:37:03,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 15:37:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 15:37:03,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:37:04,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:04,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:04,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-11-25 15:37:04,572 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 15:37:04,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-11-25 15:37:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:37:04,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861022702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:04,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:04,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 22 [2022-11-25 15:37:04,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752127229] [2022-11-25 15:37:04,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:04,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 15:37:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 15:37:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:37:05,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 219 [2022-11-25 15:37:05,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 820 transitions, 16008 flow. Second operand has 24 states, 24 states have (on average 91.79166666666667) internal successors, (2203), 24 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) [2022-11-25 15:37:05,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:05,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 219 [2022-11-25 15:37:05,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:08,951 INFO L130 PetriNetUnfolder]: 2180/4111 cut-off events. [2022-11-25 15:37:08,951 INFO L131 PetriNetUnfolder]: For 124655/124655 co-relation queries the response was YES. [2022-11-25 15:37:08,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43025 conditions, 4111 events. 2180/4111 cut-off events. For 124655/124655 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28203 event pairs, 334 based on Foata normal form. 6/4117 useless extension candidates. Maximal degree in co-relation 42358. Up to 3583 conditions per place. [2022-11-25 15:37:09,020 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 785 selfloop transitions, 131 changer transitions 4/920 dead transitions. [2022-11-25 15:37:09,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 920 transitions, 20615 flow [2022-11-25 15:37:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:37:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 15:37:09,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2202 transitions. [2022-11-25 15:37:09,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371649791542585 [2022-11-25 15:37:09,024 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2202 transitions. [2022-11-25 15:37:09,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2202 transitions. [2022-11-25 15:37:09,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:09,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2202 transitions. [2022-11-25 15:37:09,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 95.73913043478261) internal successors, (2202), 23 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:09,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 219.0) internal successors, (5256), 24 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:09,030 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 219.0) internal successors, (5256), 24 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:09,030 INFO L175 Difference]: Start difference. First operand has 451 places, 820 transitions, 16008 flow. Second operand 23 states and 2202 transitions. [2022-11-25 15:37:09,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 920 transitions, 20615 flow [2022-11-25 15:37:09,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 920 transitions, 19724 flow, removed 362 selfloop flow, removed 25 redundant places. [2022-11-25 15:37:09,976 INFO L231 Difference]: Finished difference. Result has 452 places, 852 transitions, 17223 flow [2022-11-25 15:37:09,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=15169, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=17223, PETRI_PLACES=452, PETRI_TRANSITIONS=852} [2022-11-25 15:37:09,978 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2022-11-25 15:37:09,978 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 852 transitions, 17223 flow [2022-11-25 15:37:09,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 91.79166666666667) internal successors, (2203), 24 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) [2022-11-25 15:37:09,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:09,979 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:09,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 15:37:10,189 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:10,190 INFO L85 PathProgramCache]: Analyzing trace with hash 661853295, now seen corresponding path program 42 times [2022-11-25 15:37:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:10,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246863294] [2022-11-25 15:37:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246863294] [2022-11-25 15:37:11,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246863294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:11,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577966577] [2022-11-25 15:37:11,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:37:11,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:11,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:11,882 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:11,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 15:37:12,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:37:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 15:37:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:37:12,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:12,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:12,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-11-25 15:37:13,035 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 15:37:13,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-11-25 15:37:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:37:13,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577966577] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:13,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:13,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2022-11-25 15:37:13,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912925251] [2022-11-25 15:37:13,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:13,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:37:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:37:13,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:37:15,998 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:37:15,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 852 transitions, 17223 flow. Second operand has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:15,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:15,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:37:15,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:20,204 INFO L130 PetriNetUnfolder]: 2410/4561 cut-off events. [2022-11-25 15:37:20,204 INFO L131 PetriNetUnfolder]: For 155030/155030 co-relation queries the response was YES. [2022-11-25 15:37:20,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49099 conditions, 4561 events. 2410/4561 cut-off events. For 155030/155030 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32249 event pairs, 339 based on Foata normal form. 6/4567 useless extension candidates. Maximal degree in co-relation 48428. Up to 3803 conditions per place. [2022-11-25 15:37:20,283 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 724 selfloop transitions, 268 changer transitions 3/995 dead transitions. [2022-11-25 15:37:20,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 995 transitions, 23201 flow [2022-11-25 15:37:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 15:37:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 15:37:20,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2298 transitions. [2022-11-25 15:37:20,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3747553816046967 [2022-11-25 15:37:20,286 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2298 transitions. [2022-11-25 15:37:20,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2298 transitions. [2022-11-25 15:37:20,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:20,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2298 transitions. [2022-11-25 15:37:20,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 82.07142857142857) internal successors, (2298), 28 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:20,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 219.0) internal successors, (6351), 29 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:20,292 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 219.0) internal successors, (6351), 29 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:20,292 INFO L175 Difference]: Start difference. First operand has 452 places, 852 transitions, 17223 flow. Second operand 28 states and 2298 transitions. [2022-11-25 15:37:20,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 995 transitions, 23201 flow [2022-11-25 15:37:21,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 995 transitions, 21862 flow, removed 622 selfloop flow, removed 11 redundant places. [2022-11-25 15:37:21,059 INFO L231 Difference]: Finished difference. Result has 476 places, 929 transitions, 19804 flow [2022-11-25 15:37:21,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=15884, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=19804, PETRI_PLACES=476, PETRI_TRANSITIONS=929} [2022-11-25 15:37:21,060 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2022-11-25 15:37:21,060 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 929 transitions, 19804 flow [2022-11-25 15:37:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.63636363636364) internal successors, (2595), 33 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:21,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:21,061 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:21,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:21,261 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2022601745, now seen corresponding path program 43 times [2022-11-25 15:37:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:21,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400957243] [2022-11-25 15:37:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:21,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:22,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400957243] [2022-11-25 15:37:22,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400957243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878327237] [2022-11-25 15:37:22,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:37:22,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:22,387 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:22,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 15:37:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:22,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 15:37:22,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:37:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:23,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:23,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-11-25 15:37:23,643 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 15:37:23,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-11-25 15:37:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:37:23,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878327237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:23,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:23,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2022-11-25 15:37:23,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734765240] [2022-11-25 15:37:23,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:23,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:37:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:23,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:37:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:37:25,806 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 219 [2022-11-25 15:37:25,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 929 transitions, 19804 flow. Second operand has 34 states, 34 states have (on average 83.6470588235294) internal successors, (2844), 34 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:25,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:25,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 219 [2022-11-25 15:37:25,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:30,016 INFO L130 PetriNetUnfolder]: 2596/4943 cut-off events. [2022-11-25 15:37:30,016 INFO L131 PetriNetUnfolder]: For 180715/180715 co-relation queries the response was YES. [2022-11-25 15:37:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54649 conditions, 4943 events. 2596/4943 cut-off events. For 180715/180715 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35743 event pairs, 380 based on Foata normal form. 6/4949 useless extension candidates. Maximal degree in co-relation 53969. Up to 4235 conditions per place. [2022-11-25 15:37:30,132 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 791 selfloop transitions, 257 changer transitions 3/1051 dead transitions. [2022-11-25 15:37:30,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1051 transitions, 25553 flow [2022-11-25 15:37:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 15:37:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 15:37:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2706 transitions. [2022-11-25 15:37:30,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3985859478568272 [2022-11-25 15:37:30,135 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2706 transitions. [2022-11-25 15:37:30,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2706 transitions. [2022-11-25 15:37:30,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:30,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2706 transitions. [2022-11-25 15:37:30,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 87.29032258064517) internal successors, (2706), 31 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:30,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 219.0) internal successors, (7008), 32 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:30,145 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 219.0) internal successors, (7008), 32 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:30,146 INFO L175 Difference]: Start difference. First operand has 476 places, 929 transitions, 19804 flow. Second operand 31 states and 2706 transitions. [2022-11-25 15:37:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1051 transitions, 25553 flow [2022-11-25 15:37:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1051 transitions, 23814 flow, removed 823 selfloop flow, removed 12 redundant places. [2022-11-25 15:37:31,320 INFO L231 Difference]: Finished difference. Result has 499 places, 973 transitions, 21210 flow [2022-11-25 15:37:31,320 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=18147, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21210, PETRI_PLACES=499, PETRI_TRANSITIONS=973} [2022-11-25 15:37:31,321 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 478 predicate places. [2022-11-25 15:37:31,321 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 973 transitions, 21210 flow [2022-11-25 15:37:31,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 83.6470588235294) internal successors, (2844), 34 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:31,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:31,321 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:31,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:31,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-25 15:37:31,522 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash -949087663, now seen corresponding path program 44 times [2022-11-25 15:37:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:31,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916924313] [2022-11-25 15:37:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916924313] [2022-11-25 15:37:32,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916924313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:32,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166665732] [2022-11-25 15:37:32,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:37:32,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:32,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:32,975 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:32,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 15:37:33,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:37:33,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:33,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:37:33,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:33,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:33,667 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 15 treesize of output 16 [2022-11-25 15:37:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:33,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:34,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 157 [2022-11-25 15:37:35,416 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-11-25 15:37:35,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 90 [2022-11-25 15:37:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166665732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:36,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-25 15:37:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695547754] [2022-11-25 15:37:36,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:36,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 15:37:36,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 15:37:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:37:42,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:37:42,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 973 transitions, 21210 flow. Second operand has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:42,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:42,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:37:42,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:37:47,440 INFO L130 PetriNetUnfolder]: 2678/5101 cut-off events. [2022-11-25 15:37:47,440 INFO L131 PetriNetUnfolder]: For 177411/177411 co-relation queries the response was YES. [2022-11-25 15:37:47,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55398 conditions, 5101 events. 2678/5101 cut-off events. For 177411/177411 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37206 event pairs, 390 based on Foata normal form. 4/5105 useless extension candidates. Maximal degree in co-relation 54712. Up to 4582 conditions per place. [2022-11-25 15:37:47,564 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 831 selfloop transitions, 226 changer transitions 4/1061 dead transitions. [2022-11-25 15:37:47,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1061 transitions, 25141 flow [2022-11-25 15:37:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 15:37:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 15:37:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2526 transitions. [2022-11-25 15:37:47,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37207247017233763 [2022-11-25 15:37:47,568 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2526 transitions. [2022-11-25 15:37:47,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2526 transitions. [2022-11-25 15:37:47,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:37:47,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2526 transitions. [2022-11-25 15:37:47,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.48387096774194) internal successors, (2526), 31 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:47,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 219.0) internal successors, (7008), 32 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:47,575 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 219.0) internal successors, (7008), 32 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:47,575 INFO L175 Difference]: Start difference. First operand has 499 places, 973 transitions, 21210 flow. Second operand 31 states and 2526 transitions. [2022-11-25 15:37:47,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1061 transitions, 25141 flow [2022-11-25 15:37:48,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1061 transitions, 23413 flow, removed 787 selfloop flow, removed 15 redundant places. [2022-11-25 15:37:48,693 INFO L231 Difference]: Finished difference. Result has 516 places, 1004 transitions, 21136 flow [2022-11-25 15:37:48,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=19483, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21136, PETRI_PLACES=516, PETRI_TRANSITIONS=1004} [2022-11-25 15:37:48,695 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 495 predicate places. [2022-11-25 15:37:48,695 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1004 transitions, 21136 flow [2022-11-25 15:37:48,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:48,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:37:48,696 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:48,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-25 15:37:48,902 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:37:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2033104849, now seen corresponding path program 45 times [2022-11-25 15:37:48,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059247137] [2022-11-25 15:37:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:37:50,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:50,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059247137] [2022-11-25 15:37:50,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059247137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:50,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42077253] [2022-11-25 15:37:50,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:37:50,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:50,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:50,021 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 15:37:50,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:37:50,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:37:50,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-25 15:37:50,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:50,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:37:50,487 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 [2022-11-25 15:37:50,526 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 [2022-11-25 15:37:50,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:37:50,831 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 17 treesize of output 18 [2022-11-25 15:37:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:37:50,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:37:51,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42077253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:37:51,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:37:51,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2022-11-25 15:37:51,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002252345] [2022-11-25 15:37:51,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:51,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:37:51,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:51,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:37:51,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 15:37:55,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:37:55,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1004 transitions, 21136 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:37:55,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:37:55,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:37:55,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:02,592 INFO L130 PetriNetUnfolder]: 2784/5305 cut-off events. [2022-11-25 15:38:02,592 INFO L131 PetriNetUnfolder]: For 184734/184734 co-relation queries the response was YES. [2022-11-25 15:38:02,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57190 conditions, 5305 events. 2784/5305 cut-off events. For 184734/184734 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38926 event pairs, 412 based on Foata normal form. 2/5307 useless extension candidates. Maximal degree in co-relation 56837. Up to 4606 conditions per place. [2022-11-25 15:38:02,695 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 801 selfloop transitions, 306 changer transitions 5/1112 dead transitions. [2022-11-25 15:38:02,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1112 transitions, 25909 flow [2022-11-25 15:38:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:38:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 15:38:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2980 transitions. [2022-11-25 15:38:02,697 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36776502529927185 [2022-11-25 15:38:02,697 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2980 transitions. [2022-11-25 15:38:02,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2980 transitions. [2022-11-25 15:38:02,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:02,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2980 transitions. [2022-11-25 15:38:02,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.54054054054055) internal successors, (2980), 37 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:02,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:02,706 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 219.0) internal successors, (8322), 38 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:02,706 INFO L175 Difference]: Start difference. First operand has 516 places, 1004 transitions, 21136 flow. Second operand 37 states and 2980 transitions. [2022-11-25 15:38:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1112 transitions, 25909 flow [2022-11-25 15:38:04,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1112 transitions, 25498 flow, removed 155 selfloop flow, removed 18 redundant places. [2022-11-25 15:38:04,175 INFO L231 Difference]: Finished difference. Result has 543 places, 1044 transitions, 23335 flow [2022-11-25 15:38:04,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=20725, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23335, PETRI_PLACES=543, PETRI_TRANSITIONS=1044} [2022-11-25 15:38:04,176 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 522 predicate places. [2022-11-25 15:38:04,176 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 1044 transitions, 23335 flow [2022-11-25 15:38:04,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:04,177 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:04,177 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:04,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-25 15:38:04,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-25 15:38:04,378 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:38:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:04,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1417058897, now seen corresponding path program 46 times [2022-11-25 15:38:04,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:04,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083367571] [2022-11-25 15:38:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:04,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:05,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:05,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083367571] [2022-11-25 15:38:05,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083367571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653673046] [2022-11-25 15:38:05,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:38:05,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:05,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:05,549 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:05,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-25 15:38:05,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:38:05,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-25 15:38:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:06,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:06,202 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 15 treesize of output 16 [2022-11-25 15:38:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:06,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:06,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 158 [2022-11-25 15:38:07,975 INFO L321 Elim1Store]: treesize reduction 68, result has 53.7 percent of original size [2022-11-25 15:38:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 89 [2022-11-25 15:38:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653673046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:08,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-11-25 15:38:08,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982360383] [2022-11-25 15:38:08,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:08,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 15:38:08,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 15:38:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:38:13,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:38:13,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1044 transitions, 23335 flow. Second operand has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:13,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:13,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:38:13,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:19,042 INFO L130 PetriNetUnfolder]: 2864/5448 cut-off events. [2022-11-25 15:38:19,042 INFO L131 PetriNetUnfolder]: For 239247/239247 co-relation queries the response was YES. [2022-11-25 15:38:19,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63073 conditions, 5448 events. 2864/5448 cut-off events. For 239247/239247 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 40341 event pairs, 439 based on Foata normal form. 4/5452 useless extension candidates. Maximal degree in co-relation 62586. Up to 4774 conditions per place. [2022-11-25 15:38:19,612 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 827 selfloop transitions, 319 changer transitions 4/1150 dead transitions. [2022-11-25 15:38:19,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1150 transitions, 27601 flow [2022-11-25 15:38:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 15:38:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 15:38:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2849 transitions. [2022-11-25 15:38:19,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37168949771689497 [2022-11-25 15:38:19,616 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2849 transitions. [2022-11-25 15:38:19,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2849 transitions. [2022-11-25 15:38:19,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:19,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2849 transitions. [2022-11-25 15:38:19,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 81.4) internal successors, (2849), 35 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 219.0) internal successors, (7884), 36 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,623 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 219.0) internal successors, (7884), 36 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:19,623 INFO L175 Difference]: Start difference. First operand has 543 places, 1044 transitions, 23335 flow. Second operand 35 states and 2849 transitions. [2022-11-25 15:38:19,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1150 transitions, 27601 flow [2022-11-25 15:38:21,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1150 transitions, 26068 flow, removed 650 selfloop flow, removed 24 redundant places. [2022-11-25 15:38:21,355 INFO L231 Difference]: Finished difference. Result has 557 places, 1085 transitions, 23711 flow [2022-11-25 15:38:21,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=21944, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23711, PETRI_PLACES=557, PETRI_TRANSITIONS=1085} [2022-11-25 15:38:21,356 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 536 predicate places. [2022-11-25 15:38:21,357 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1085 transitions, 23711 flow [2022-11-25 15:38:21,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 78.38095238095238) internal successors, (3292), 42 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:21,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:21,357 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:21,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:21,558 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:38:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 673124115, now seen corresponding path program 47 times [2022-11-25 15:38:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854510079] [2022-11-25 15:38:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854510079] [2022-11-25 15:38:22,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854510079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435765538] [2022-11-25 15:38:22,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:38:22,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:22,955 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:22,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 15:38:23,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-25 15:38:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-25 15:38:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:23,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:38:23,364 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 [2022-11-25 15:38:23,409 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 [2022-11-25 15:38:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:23,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:38:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:38:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:38:23,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:23,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 20 [2022-11-25 15:38:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435765538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:24,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 9] total 37 [2022-11-25 15:38:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685715048] [2022-11-25 15:38:24,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:24,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:38:24,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:38:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 15:38:28,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 219 [2022-11-25 15:38:28,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1085 transitions, 23711 flow. Second operand has 39 states, 39 states have (on average 78.56410256410257) internal successors, (3064), 39 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:28,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:28,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 219 [2022-11-25 15:38:28,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:41,044 INFO L130 PetriNetUnfolder]: 3043/5824 cut-off events. [2022-11-25 15:38:41,044 INFO L131 PetriNetUnfolder]: For 281900/281900 co-relation queries the response was YES. [2022-11-25 15:38:41,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69121 conditions, 5824 events. 3043/5824 cut-off events. For 281900/281900 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44231 event pairs, 161 based on Foata normal form. 5/5829 useless extension candidates. Maximal degree in co-relation 68351. Up to 3530 conditions per place. [2022-11-25 15:38:41,157 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 812 selfloop transitions, 466 changer transitions 29/1307 dead transitions. [2022-11-25 15:38:41,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1307 transitions, 31772 flow [2022-11-25 15:38:41,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 15:38:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-25 15:38:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5301 transitions. [2022-11-25 15:38:41,165 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37239199157007374 [2022-11-25 15:38:41,166 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5301 transitions. [2022-11-25 15:38:41,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5301 transitions. [2022-11-25 15:38:41,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:41,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5301 transitions. [2022-11-25 15:38:41,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 81.55384615384615) internal successors, (5301), 65 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 219.0) internal successors, (14454), 66 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,184 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 219.0) internal successors, (14454), 66 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:41,184 INFO L175 Difference]: Start difference. First operand has 557 places, 1085 transitions, 23711 flow. Second operand 65 states and 5301 transitions. [2022-11-25 15:38:41,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1307 transitions, 31772 flow [2022-11-25 15:38:43,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 1307 transitions, 31411 flow, removed 137 selfloop flow, removed 16 redundant places. [2022-11-25 15:38:43,148 INFO L231 Difference]: Finished difference. Result has 615 places, 1156 transitions, 27765 flow [2022-11-25 15:38:43,149 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=23346, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=27765, PETRI_PLACES=615, PETRI_TRANSITIONS=1156} [2022-11-25 15:38:43,150 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 594 predicate places. [2022-11-25 15:38:43,150 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 1156 transitions, 27765 flow [2022-11-25 15:38:43,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.56410256410257) internal successors, (3064), 39 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:43,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:43,151 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:43,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-11-25 15:38:43,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-11-25 15:38:43,357 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:38:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1342824407, now seen corresponding path program 48 times [2022-11-25 15:38:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:43,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543910293] [2022-11-25 15:38:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:44,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543910293] [2022-11-25 15:38:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543910293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:44,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127688097] [2022-11-25 15:38:44,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:38:44,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:44,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:44,687 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:44,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-25 15:38:45,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 15:38:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:38:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 15:38:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:45,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:45,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:38:45,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 131 [2022-11-25 15:38:46,009 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 15:38:46,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2022-11-25 15:38:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:38:46,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127688097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:38:46,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:38:46,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2022-11-25 15:38:46,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669242521] [2022-11-25 15:38:46,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:46,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:38:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:46,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:38:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:38:48,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 219 [2022-11-25 15:38:48,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 1156 transitions, 27765 flow. Second operand has 33 states, 33 states have (on average 77.63636363636364) internal successors, (2562), 33 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:48,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:38:48,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 219 [2022-11-25 15:38:48,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:38:55,679 INFO L130 PetriNetUnfolder]: 3192/6113 cut-off events. [2022-11-25 15:38:55,679 INFO L131 PetriNetUnfolder]: For 368107/368107 co-relation queries the response was YES. [2022-11-25 15:38:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78096 conditions, 6113 events. 3192/6113 cut-off events. For 368107/368107 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 46614 event pairs, 463 based on Foata normal form. 6/6119 useless extension candidates. Maximal degree in co-relation 77376. Up to 5144 conditions per place. [2022-11-25 15:38:55,832 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 939 selfloop transitions, 347 changer transitions 4/1290 dead transitions. [2022-11-25 15:38:55,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1290 transitions, 34325 flow [2022-11-25 15:38:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 15:38:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 15:38:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2925 transitions. [2022-11-25 15:38:55,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3710045662100457 [2022-11-25 15:38:55,835 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2925 transitions. [2022-11-25 15:38:55,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2925 transitions. [2022-11-25 15:38:55,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:38:55,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2925 transitions. [2022-11-25 15:38:55,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 81.25) internal successors, (2925), 36 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:55,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 219.0) internal successors, (8103), 37 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:55,842 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 219.0) internal successors, (8103), 37 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:55,842 INFO L175 Difference]: Start difference. First operand has 615 places, 1156 transitions, 27765 flow. Second operand 36 states and 2925 transitions. [2022-11-25 15:38:55,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1290 transitions, 34325 flow [2022-11-25 15:38:58,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 1290 transitions, 30421 flow, removed 1874 selfloop flow, removed 22 redundant places. [2022-11-25 15:38:58,741 INFO L231 Difference]: Finished difference. Result has 630 places, 1198 transitions, 27182 flow [2022-11-25 15:38:58,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=23977, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=27182, PETRI_PLACES=630, PETRI_TRANSITIONS=1198} [2022-11-25 15:38:58,743 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 609 predicate places. [2022-11-25 15:38:58,743 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 1198 transitions, 27182 flow [2022-11-25 15:38:58,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 77.63636363636364) internal successors, (2562), 33 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:38:58,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:38:58,743 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:58,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:58,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-25 15:38:58,944 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:38:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:58,944 INFO L85 PathProgramCache]: Analyzing trace with hash -617758181, now seen corresponding path program 49 times [2022-11-25 15:38:58,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:58,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475003503] [2022-11-25 15:38:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:58,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:38:59,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475003503] [2022-11-25 15:38:59,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475003503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741745431] [2022-11-25 15:38:59,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:38:59,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:59,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:59,928 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:59,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-25 15:39:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:00,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 15:39:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:00,401 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 29 treesize of output 27 [2022-11-25 15:39:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:00,888 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1845 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1845) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset))) (+ .cse3 c_~counter~0 1))) (forall ((v_ArrVal_1845 (Array Int Int))) (<= (+ .cse3 c_~counter~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1845) c_~A~0.base))) (+ (select .cse4 .cse1) (select .cse4 .cse2) (select .cse4 c_~A~0.offset))))))) is different from false [2022-11-25 15:39:00,902 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (select .cse6 (+ c_~A~0.offset .cse7))) (.cse4 (select .cse6 (+ c_~A~0.offset .cse7 4))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1845 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1845) c_~A~0.base))) (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset))) (+ .cse3 c_~counter~0 .cse4 1))) (forall ((v_ArrVal_1845 (Array Int Int))) (<= (+ .cse3 c_~counter~0 .cse4) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1845) c_~A~0.base))) (+ (select .cse5 .cse1) (select .cse5 .cse2) (select .cse5 c_~A~0.offset)))))))) is different from false [2022-11-25 15:39:00,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:00,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 138 [2022-11-25 15:39:00,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:00,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 15 [2022-11-25 15:39:01,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:39:01,282 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:39:01,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:39:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2022-11-25 15:39:01,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741745431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:01,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:01,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2022-11-25 15:39:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933882554] [2022-11-25 15:39:01,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:39:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:39:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1186, Unknown=6, NotChecked=142, Total=1482 [2022-11-25 15:39:01,620 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 219 [2022-11-25 15:39:01,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 1198 transitions, 27182 flow. Second operand has 39 states, 39 states have (on average 65.43589743589743) internal successors, (2552), 39 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:01,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:01,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 219 [2022-11-25 15:39:01,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:09,617 INFO L130 PetriNetUnfolder]: 3313/6339 cut-off events. [2022-11-25 15:39:09,617 INFO L131 PetriNetUnfolder]: For 323191/323191 co-relation queries the response was YES. [2022-11-25 15:39:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75311 conditions, 6339 events. 3313/6339 cut-off events. For 323191/323191 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 48605 event pairs, 447 based on Foata normal form. 2/6341 useless extension candidates. Maximal degree in co-relation 74881. Up to 5345 conditions per place. [2022-11-25 15:39:09,790 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 902 selfloop transitions, 406 changer transitions 1/1309 dead transitions. [2022-11-25 15:39:09,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 1309 transitions, 32612 flow [2022-11-25 15:39:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 15:39:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 15:39:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2185 transitions. [2022-11-25 15:39:09,795 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3117865296803653 [2022-11-25 15:39:09,795 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2185 transitions. [2022-11-25 15:39:09,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2185 transitions. [2022-11-25 15:39:09,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:09,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2185 transitions. [2022-11-25 15:39:09,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 68.28125) internal successors, (2185), 32 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 219.0) internal successors, (7227), 33 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,804 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 219.0) internal successors, (7227), 33 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:09,804 INFO L175 Difference]: Start difference. First operand has 630 places, 1198 transitions, 27182 flow. Second operand 32 states and 2185 transitions. [2022-11-25 15:39:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 1309 transitions, 32612 flow [2022-11-25 15:39:12,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1309 transitions, 30764 flow, removed 800 selfloop flow, removed 24 redundant places. [2022-11-25 15:39:12,352 INFO L231 Difference]: Finished difference. Result has 646 places, 1263 transitions, 28717 flow [2022-11-25 15:39:12,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=25338, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=28717, PETRI_PLACES=646, PETRI_TRANSITIONS=1263} [2022-11-25 15:39:12,354 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 625 predicate places. [2022-11-25 15:39:12,354 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1263 transitions, 28717 flow [2022-11-25 15:39:12,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 65.43589743589743) internal successors, (2552), 39 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:12,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:12,354 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:12,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:12,555 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:39:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2076848131, now seen corresponding path program 50 times [2022-11-25 15:39:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312450897] [2022-11-25 15:39:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:13,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:13,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312450897] [2022-11-25 15:39:13,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312450897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924994907] [2022-11-25 15:39:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:39:13,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:13,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:13,822 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:13,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-25 15:39:14,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:39:14,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-25 15:39:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:14,179 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 19 treesize of output 21 [2022-11-25 15:39:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:39:14,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:14,849 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6 4)) (.cse4 (+ c_~A~0.offset .cse6)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1884 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1884) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset)) (+ (select .cse0 .cse3) c_~counter~0 (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_1884 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1884) c_~A~0.base))) (<= (+ (select .cse5 .cse3) c_~counter~0 (select .cse5 .cse4)) (+ (select .cse5 .cse1) (select .cse5 .cse2) (select .cse5 c_~A~0.offset)))))))) is different from false [2022-11-25 15:39:14,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:14,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 152 [2022-11-25 15:39:14,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:14,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 82 [2022-11-25 15:39:15,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:39:15,356 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:39:15,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:39:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:39:15,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924994907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:15,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:15,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2022-11-25 15:39:15,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762213547] [2022-11-25 15:39:15,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:15,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 15:39:15,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 15:39:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1132, Unknown=1, NotChecked=68, Total=1332 [2022-11-25 15:39:15,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:39:15,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1263 transitions, 28717 flow. Second operand has 37 states, 37 states have (on average 62.45945945945946) internal successors, (2311), 37 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:15,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:15,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:39:15,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:22,690 INFO L130 PetriNetUnfolder]: 3439/6585 cut-off events. [2022-11-25 15:39:22,690 INFO L131 PetriNetUnfolder]: For 329509/329509 co-relation queries the response was YES. [2022-11-25 15:39:22,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79336 conditions, 6585 events. 3439/6585 cut-off events. For 329509/329509 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 51001 event pairs, 490 based on Foata normal form. 2/6587 useless extension candidates. Maximal degree in co-relation 78831. Up to 5796 conditions per place. [2022-11-25 15:39:22,921 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 981 selfloop transitions, 357 changer transitions 1/1339 dead transitions. [2022-11-25 15:39:22,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 1339 transitions, 33305 flow [2022-11-25 15:39:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 15:39:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 15:39:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1641 transitions. [2022-11-25 15:39:22,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2997260273972603 [2022-11-25 15:39:22,925 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1641 transitions. [2022-11-25 15:39:22,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1641 transitions. [2022-11-25 15:39:22,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:22,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1641 transitions. [2022-11-25 15:39:22,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.64) internal successors, (1641), 25 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 219.0) internal successors, (5694), 26 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,932 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 219.0) internal successors, (5694), 26 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:22,932 INFO L175 Difference]: Start difference. First operand has 646 places, 1263 transitions, 28717 flow. Second operand 25 states and 1641 transitions. [2022-11-25 15:39:22,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 1339 transitions, 33305 flow [2022-11-25 15:39:26,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 650 places, 1339 transitions, 31822 flow, removed 490 selfloop flow, removed 20 redundant places. [2022-11-25 15:39:26,089 INFO L231 Difference]: Finished difference. Result has 653 places, 1295 transitions, 29299 flow [2022-11-25 15:39:26,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=27242, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29299, PETRI_PLACES=653, PETRI_TRANSITIONS=1295} [2022-11-25 15:39:26,090 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 632 predicate places. [2022-11-25 15:39:26,090 INFO L495 AbstractCegarLoop]: Abstraction has has 653 places, 1295 transitions, 29299 flow [2022-11-25 15:39:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 62.45945945945946) internal successors, (2311), 37 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:26,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:26,091 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:26,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-25 15:39:26,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:26,292 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:39:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:26,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1978044585, now seen corresponding path program 51 times [2022-11-25 15:39:26,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:26,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146554377] [2022-11-25 15:39:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:26,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146554377] [2022-11-25 15:39:27,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146554377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455571377] [2022-11-25 15:39:27,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:39:27,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:27,476 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:27,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 15:39:27,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:39:27,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-25 15:39:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:27,895 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 15 treesize of output 11 [2022-11-25 15:39:27,951 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 [2022-11-25 15:39:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:28,064 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 14 treesize of output 16 [2022-11-25 15:39:28,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:28,308 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 17 treesize of output 18 [2022-11-25 15:39:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:39:28,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:29,175 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse5))) (.cse2 (+ c_~A~0.offset .cse5 4))) (and (forall ((v_ArrVal_1926 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1926) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse3))))) (forall ((v_ArrVal_1926 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1926) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse3)) (+ .cse0 (select .cse4 .cse2) c_~counter~0 1))))))) is different from false [2022-11-25 15:39:29,184 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_1926 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1926) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_1926 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1926) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-11-25 15:39:29,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:29,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 80 [2022-11-25 15:39:29,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 320 treesize of output 294 [2022-11-25 15:39:29,318 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 270 treesize of output 254 [2022-11-25 15:39:29,322 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 254 treesize of output 238 [2022-11-25 15:39:29,327 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 238 treesize of output 222 [2022-11-25 15:39:29,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:39:29,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2022-11-25 15:39:29,380 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 56 treesize of output 52 [2022-11-25 15:39:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-25 15:39:29,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455571377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:29,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:29,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 41 [2022-11-25 15:39:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778752717] [2022-11-25 15:39:29,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:39:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:39:29,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1444, Unknown=9, NotChecked=158, Total=1806 [2022-11-25 15:39:29,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:39:29,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 653 places, 1295 transitions, 29299 flow. Second operand has 43 states, 43 states have (on average 62.395348837209305) internal successors, (2683), 43 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:29,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:29,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:39:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:39:38,544 INFO L130 PetriNetUnfolder]: 3480/6668 cut-off events. [2022-11-25 15:39:38,544 INFO L131 PetriNetUnfolder]: For 329606/329606 co-relation queries the response was YES. [2022-11-25 15:39:38,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79916 conditions, 6668 events. 3480/6668 cut-off events. For 329606/329606 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 51736 event pairs, 518 based on Foata normal form. 2/6670 useless extension candidates. Maximal degree in co-relation 79562. Up to 5848 conditions per place. [2022-11-25 15:39:38,679 INFO L137 encePairwiseOnDemand]: 210/219 looper letters, 948 selfloop transitions, 406 changer transitions 2/1356 dead transitions. [2022-11-25 15:39:38,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1356 transitions, 33215 flow [2022-11-25 15:39:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:39:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 15:39:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2206 transitions. [2022-11-25 15:39:38,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29626645178619393 [2022-11-25 15:39:38,683 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2206 transitions. [2022-11-25 15:39:38,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2206 transitions. [2022-11-25 15:39:38,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:39:38,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2206 transitions. [2022-11-25 15:39:38,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.88235294117646) internal successors, (2206), 34 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:38,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 219.0) internal successors, (7665), 35 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 219.0) internal successors, (7665), 35 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:38,692 INFO L175 Difference]: Start difference. First operand has 653 places, 1295 transitions, 29299 flow. Second operand 34 states and 2206 transitions. [2022-11-25 15:39:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1356 transitions, 33215 flow [2022-11-25 15:39:41,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 1356 transitions, 32100 flow, removed 434 selfloop flow, removed 17 redundant places. [2022-11-25 15:39:41,859 INFO L231 Difference]: Finished difference. Result has 675 places, 1311 transitions, 29857 flow [2022-11-25 15:39:41,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=28184, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29857, PETRI_PLACES=675, PETRI_TRANSITIONS=1311} [2022-11-25 15:39:41,860 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 654 predicate places. [2022-11-25 15:39:41,860 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1311 transitions, 29857 flow [2022-11-25 15:39:41,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 62.395348837209305) internal successors, (2683), 43 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:41,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:39:41,861 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:41,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-25 15:39:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:42,067 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:39:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1863181915, now seen corresponding path program 52 times [2022-11-25 15:39:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:42,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934343463] [2022-11-25 15:39:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:42,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934343463] [2022-11-25 15:39:43,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934343463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911494555] [2022-11-25 15:39:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:39:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:43,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:43,267 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:43,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-25 15:39:43,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:39:43,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:39:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-25 15:39:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:43,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:39:43,654 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 [2022-11-25 15:39:43,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:39:43,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 15:39:44,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:44,107 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 15 treesize of output 16 [2022-11-25 15:39:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:39:44,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:46,320 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_subst_15 Int) (v_ArrVal_1968 (Array Int Int))) (or (not (< v_subst_15 c_~N~0)) (< (+ v_subst_15 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset (* v_subst_15 4)))) (+ (select .cse0 .cse2) c_~counter~0 1))))) (forall ((v_subst_16 Int) (v_ArrVal_1968 (Array Int Int))) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (<= (+ (select .cse3 .cse2) c_~counter~0) (+ (select .cse3 .cse1) (select .cse3 c_~A~0.offset) (select .cse3 (+ c_~A~0.offset (* v_subst_16 4)))))) (< (+ v_subst_16 1) c_~N~0) (not (< v_subst_16 c_~N~0)))))) is different from false [2022-11-25 15:39:46,358 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse5))) (.cse2 (+ c_~A~0.offset .cse5 4))) (and (forall ((v_subst_16 Int) (v_ArrVal_1968 (Array Int Int))) (or (< (+ v_subst_16 1) c_~N~0) (not (< v_subst_16 c_~N~0)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 .cse3) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* v_subst_16 4)))))))) (forall ((v_subst_15 Int) (v_ArrVal_1968 (Array Int Int))) (or (not (< v_subst_15 c_~N~0)) (< (+ v_subst_15 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (< (+ (select .cse4 .cse3) (select .cse4 c_~A~0.offset) (select .cse4 (+ c_~A~0.offset (* v_subst_15 4)))) (+ .cse0 (select .cse4 .cse2) c_~counter~0 1)))))))) is different from false [2022-11-25 15:39:51,522 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~A~0.offset 4)) (.cse6 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse6 c_~A~0.offset)) (.cse2 (+ c_~A~0.offset 8)) (.cse3 (select .cse6 .cse4))) (and (forall ((v_subst_16 Int) (v_ArrVal_1968 (Array Int Int))) (or (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0 .cse3) (+ (select .cse1 .cse4) (select .cse1 c_~A~0.offset) (select .cse1 (+ c_~A~0.offset (* v_subst_16 4)))))) (< (+ v_subst_16 1) c_~N~0) (not (< v_subst_16 c_~N~0)))) (forall ((v_subst_15 Int) (v_ArrVal_1968 (Array Int Int))) (or (not (< v_subst_15 c_~N~0)) (< (+ v_subst_15 1) c_~N~0) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1968) c_~A~0.base))) (< (+ (select .cse5 .cse4) (select .cse5 c_~A~0.offset) (select .cse5 (+ c_~A~0.offset (* v_subst_15 4)))) (+ .cse0 (select .cse5 .cse2) c_~counter~0 .cse3 1)))))))) is different from false [2022-11-25 15:39:52,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:52,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 88 [2022-11-25 15:39:52,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:52,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 286 [2022-11-25 15:39:52,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:52,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 222 [2022-11-25 15:39:52,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:52,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 192 treesize of output 178 [2022-11-25 15:39:53,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:39:53,273 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 87 [2022-11-25 15:39:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:39:53,291 INFO L321 Elim1Store]: treesize reduction 27, result has 12.9 percent of original size [2022-11-25 15:39:53,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 96 [2022-11-25 15:39:53,317 INFO L321 Elim1Store]: treesize reduction 27, result has 12.9 percent of original size [2022-11-25 15:39:53,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 60 [2022-11-25 15:39:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-25 15:39:53,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911494555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:39:53,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:39:53,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-11-25 15:39:53,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223496442] [2022-11-25 15:39:53,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 15:39:53,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:53,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 15:39:53,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1520, Unknown=11, NotChecked=246, Total=1980 [2022-11-25 15:39:53,658 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:39:53,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1311 transitions, 29857 flow. Second operand has 45 states, 45 states have (on average 62.355555555555554) internal successors, (2806), 45 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:39:53,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:39:53,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:39:53,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:03,488 INFO L130 PetriNetUnfolder]: 3661/7009 cut-off events. [2022-11-25 15:40:03,488 INFO L131 PetriNetUnfolder]: For 385838/385838 co-relation queries the response was YES. [2022-11-25 15:40:03,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86322 conditions, 7009 events. 3661/7009 cut-off events. For 385838/385838 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 54842 event pairs, 517 based on Foata normal form. 4/7013 useless extension candidates. Maximal degree in co-relation 85810. Up to 5563 conditions per place. [2022-11-25 15:40:03,651 INFO L137 encePairwiseOnDemand]: 208/219 looper letters, 901 selfloop transitions, 565 changer transitions 7/1473 dead transitions. [2022-11-25 15:40:03,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 1473 transitions, 37004 flow [2022-11-25 15:40:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 15:40:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-25 15:40:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2948 transitions. [2022-11-25 15:40:03,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2991374936580416 [2022-11-25 15:40:03,656 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2948 transitions. [2022-11-25 15:40:03,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2948 transitions. [2022-11-25 15:40:03,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:03,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2948 transitions. [2022-11-25 15:40:03,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 65.5111111111111) internal successors, (2948), 45 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:03,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 219.0) internal successors, (10074), 46 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:03,669 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 219.0) internal successors, (10074), 46 states have internal predecessors, (10074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:03,670 INFO L175 Difference]: Start difference. First operand has 675 places, 1311 transitions, 29857 flow. Second operand 45 states and 2948 transitions. [2022-11-25 15:40:03,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 1473 transitions, 37004 flow [2022-11-25 15:40:06,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1473 transitions, 36407 flow, removed 153 selfloop flow, removed 21 redundant places. [2022-11-25 15:40:06,787 INFO L231 Difference]: Finished difference. Result has 708 places, 1383 transitions, 33907 flow [2022-11-25 15:40:06,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=29317, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=33907, PETRI_PLACES=708, PETRI_TRANSITIONS=1383} [2022-11-25 15:40:06,788 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 687 predicate places. [2022-11-25 15:40:06,788 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 1383 transitions, 33907 flow [2022-11-25 15:40:06,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 62.355555555555554) internal successors, (2806), 45 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:06,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:06,789 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:06,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-25 15:40:06,995 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:40:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1007875261, now seen corresponding path program 53 times [2022-11-25 15:40:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409717239] [2022-11-25 15:40:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:06,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:08,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409717239] [2022-11-25 15:40:08,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409717239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:08,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822690390] [2022-11-25 15:40:08,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:40:08,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:08,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:08,047 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:08,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-25 15:40:08,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 15:40:08,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:08,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-25 15:40:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:08,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2022-11-25 15:40:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:08,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:09,071 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2007 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2007) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ (select .cse0 .cse3) c_~counter~0 1)))) (forall ((v_ArrVal_2007 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2007) c_~A~0.base))) (<= (+ (select .cse4 .cse3) c_~counter~0) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2022-11-25 15:40:09,084 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse4 (+ c_~A~0.offset .cse6 4)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2007 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2007) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ .cse3 c_~counter~0 1 (select .cse0 .cse4))))) (forall ((v_ArrVal_2007 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2007) c_~A~0.base))) (<= (+ .cse3 c_~counter~0 (select .cse5 .cse4)) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse1) (select .cse5 .cse2)))))))) is different from false [2022-11-25 15:40:09,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:09,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 145 [2022-11-25 15:40:09,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:09,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-11-25 15:40:09,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:40:09,481 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:40:09,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 15:40:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2022-11-25 15:40:09,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822690390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:09,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:40:09,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 36 [2022-11-25 15:40:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822093268] [2022-11-25 15:40:09,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 15:40:09,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 15:40:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1125, Unknown=2, NotChecked=138, Total=1406 [2022-11-25 15:40:09,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 219 [2022-11-25 15:40:09,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 1383 transitions, 33907 flow. Second operand has 38 states, 38 states have (on average 62.473684210526315) internal successors, (2374), 38 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:09,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:09,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 219 [2022-11-25 15:40:09,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:18,457 INFO L130 PetriNetUnfolder]: 3804/7301 cut-off events. [2022-11-25 15:40:18,457 INFO L131 PetriNetUnfolder]: For 478183/478183 co-relation queries the response was YES. [2022-11-25 15:40:18,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95856 conditions, 7301 events. 3804/7301 cut-off events. For 478183/478183 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 57665 event pairs, 526 based on Foata normal form. 4/7305 useless extension candidates. Maximal degree in co-relation 95334. Up to 5805 conditions per place. [2022-11-25 15:40:18,660 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 971 selfloop transitions, 500 changer transitions 2/1473 dead transitions. [2022-11-25 15:40:18,660 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 736 places, 1473 transitions, 40117 flow [2022-11-25 15:40:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 15:40:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 15:40:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1908 transitions. [2022-11-25 15:40:18,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.300425129900803 [2022-11-25 15:40:18,664 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1908 transitions. [2022-11-25 15:40:18,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1908 transitions. [2022-11-25 15:40:18,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:18,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1908 transitions. [2022-11-25 15:40:18,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.79310344827586) internal successors, (1908), 29 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:18,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 219.0) internal successors, (6570), 30 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:18,669 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 219.0) internal successors, (6570), 30 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:18,669 INFO L175 Difference]: Start difference. First operand has 708 places, 1383 transitions, 33907 flow. Second operand 29 states and 1908 transitions. [2022-11-25 15:40:18,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 736 places, 1473 transitions, 40117 flow [2022-11-25 15:40:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 1473 transitions, 38444 flow, removed 783 selfloop flow, removed 17 redundant places. [2022-11-25 15:40:22,450 INFO L231 Difference]: Finished difference. Result has 725 places, 1415 transitions, 35656 flow [2022-11-25 15:40:22,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=32434, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=472, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=35656, PETRI_PLACES=725, PETRI_TRANSITIONS=1415} [2022-11-25 15:40:22,451 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 704 predicate places. [2022-11-25 15:40:22,451 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 1415 transitions, 35656 flow [2022-11-25 15:40:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 62.473684210526315) internal successors, (2374), 38 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:22,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:22,452 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:22,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:22,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-25 15:40:22,652 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:40:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1960341841, now seen corresponding path program 54 times [2022-11-25 15:40:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100818876] [2022-11-25 15:40:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:22,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:23,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100818876] [2022-11-25 15:40:23,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100818876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:23,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015383568] [2022-11-25 15:40:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:40:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:23,623 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:23,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-25 15:40:23,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 15:40:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:40:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-25 15:40:23,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:23,999 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 19 treesize of output 21 [2022-11-25 15:40:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:40:24,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:24,629 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6)) (.cse4 (+ c_~A~0.offset .cse6 4)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2046 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2046) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ (select .cse0 .cse3) c_~counter~0 (select .cse0 .cse4) 1)))) (forall ((v_ArrVal_2046 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2046) c_~A~0.base))) (<= (+ (select .cse5 .cse3) c_~counter~0 (select .cse5 .cse4)) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse1) (select .cse5 .cse2)))))))) is different from false [2022-11-25 15:40:24,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:24,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 150 [2022-11-25 15:40:24,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:24,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 81 [2022-11-25 15:40:25,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:40:25,208 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:40:25,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-11-25 15:40:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:40:25,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015383568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:25,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:40:25,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2022-11-25 15:40:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920283430] [2022-11-25 15:40:25,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:25,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 15:40:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 15:40:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=998, Unknown=1, NotChecked=64, Total=1190 [2022-11-25 15:40:25,539 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 219 [2022-11-25 15:40:25,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 1415 transitions, 35656 flow. Second operand has 35 states, 35 states have (on average 69.68571428571428) internal successors, (2439), 35 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:25,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:25,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 219 [2022-11-25 15:40:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:32,964 INFO L130 PetriNetUnfolder]: 3856/7403 cut-off events. [2022-11-25 15:40:32,964 INFO L131 PetriNetUnfolder]: For 478583/478583 co-relation queries the response was YES. [2022-11-25 15:40:33,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97157 conditions, 7403 events. 3856/7403 cut-off events. For 478583/478583 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 58600 event pairs, 587 based on Foata normal form. 4/7407 useless extension candidates. Maximal degree in co-relation 96777. Up to 6836 conditions per place. [2022-11-25 15:40:33,188 INFO L137 encePairwiseOnDemand]: 212/219 looper letters, 1216 selfloop transitions, 249 changer transitions 1/1466 dead transitions. [2022-11-25 15:40:33,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 1466 transitions, 40082 flow [2022-11-25 15:40:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 15:40:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 15:40:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1529 transitions. [2022-11-25 15:40:33,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3324635790389215 [2022-11-25 15:40:33,192 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1529 transitions. [2022-11-25 15:40:33,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1529 transitions. [2022-11-25 15:40:33,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:33,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1529 transitions. [2022-11-25 15:40:33,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 72.80952380952381) internal successors, (1529), 21 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:33,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:33,198 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:33,198 INFO L175 Difference]: Start difference. First operand has 725 places, 1415 transitions, 35656 flow. Second operand 21 states and 1529 transitions. [2022-11-25 15:40:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 1466 transitions, 40082 flow [2022-11-25 15:40:37,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 1466 transitions, 38032 flow, removed 792 selfloop flow, removed 20 redundant places. [2022-11-25 15:40:37,236 INFO L231 Difference]: Finished difference. Result has 727 places, 1426 transitions, 34976 flow [2022-11-25 15:40:37,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=33606, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=34976, PETRI_PLACES=727, PETRI_TRANSITIONS=1426} [2022-11-25 15:40:37,237 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 706 predicate places. [2022-11-25 15:40:37,237 INFO L495 AbstractCegarLoop]: Abstraction has has 727 places, 1426 transitions, 34976 flow [2022-11-25 15:40:37,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 69.68571428571428) internal successors, (2439), 35 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:37,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:40:37,237 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:37,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:37,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-25 15:40:37,438 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:40:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1462913563, now seen corresponding path program 55 times [2022-11-25 15:40:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965486964] [2022-11-25 15:40:37,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:40:38,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965486964] [2022-11-25 15:40:38,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965486964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:38,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339443626] [2022-11-25 15:40:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:40:38,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:38,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:38,527 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:38,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95bc5137-a726-4637-940e-f1e61da35011/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-25 15:40:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 15:40:38,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:38,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:40:38,932 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 19 treesize of output 21 [2022-11-25 15:40:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:39,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:39,557 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset .cse6 4)) (.cse2 (+ c_~A~0.offset .cse6))) (and (forall ((v_ArrVal_2085 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2085) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1) (select .cse0 .cse2)) (+ (select .cse0 .cse3) (select .cse0 .cse4) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_2085 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2085) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 .cse4) (select .cse5 c_~A~0.offset)) (+ c_~counter~0 (select .cse5 .cse1) 1 (select .cse5 .cse2)))))))) is different from false [2022-11-25 15:40:39,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:39,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 150 [2022-11-25 15:40:39,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:40:39,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 81 [2022-11-25 15:40:39,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:40:40,001 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 15:40:40,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 24 [2022-11-25 15:40:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:40:40,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339443626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:40:40,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:40:40,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2022-11-25 15:40:40,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358573018] [2022-11-25 15:40:40,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:40,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 15:40:40,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 15:40:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2022-11-25 15:40:40,232 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 219 [2022-11-25 15:40:40,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1426 transitions, 34976 flow. Second operand has 39 states, 39 states have (on average 65.43589743589743) internal successors, (2552), 39 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:40,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:40:40,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 219 [2022-11-25 15:40:40,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:40:48,840 INFO L130 PetriNetUnfolder]: 3990/7671 cut-off events. [2022-11-25 15:40:48,840 INFO L131 PetriNetUnfolder]: For 495771/495771 co-relation queries the response was YES. [2022-11-25 15:40:48,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101115 conditions, 7671 events. 3990/7671 cut-off events. For 495771/495771 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 61243 event pairs, 657 based on Foata normal form. 4/7675 useless extension candidates. Maximal degree in co-relation 100665. Up to 6456 conditions per place. [2022-11-25 15:40:48,998 INFO L137 encePairwiseOnDemand]: 209/219 looper letters, 1054 selfloop transitions, 469 changer transitions 2/1525 dead transitions. [2022-11-25 15:40:48,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 1525 transitions, 41832 flow [2022-11-25 15:40:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 15:40:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 15:40:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2269 transitions. [2022-11-25 15:40:49,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31396153313961533 [2022-11-25 15:40:49,002 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2269 transitions. [2022-11-25 15:40:49,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2269 transitions. [2022-11-25 15:40:49,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:40:49,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2269 transitions. [2022-11-25 15:40:49,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 68.75757575757575) internal successors, (2269), 33 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:49,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 219.0) internal successors, (7446), 34 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:49,011 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 219.0) internal successors, (7446), 34 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:40:49,011 INFO L175 Difference]: Start difference. First operand has 727 places, 1426 transitions, 34976 flow. Second operand 33 states and 2269 transitions. [2022-11-25 15:40:49,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 1525 transitions, 41832 flow