./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8 --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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- 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-2329fc7 [2022-12-13 12:24:37,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:24:37,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:24:37,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:24:37,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:24:37,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:24:37,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:24:37,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:24:37,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:24:37,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:24:37,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:24:37,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:24:37,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:24:37,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:24:37,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:24:37,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:24:37,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:24:37,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:24:37,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:24:37,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:24:37,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:24:37,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:24:37,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:24:37,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:24:37,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:24:37,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:24:37,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:24:37,435 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:24:37,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:24:37,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:24:37,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:24:37,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:24:37,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:24:37,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:24:37,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:24:37,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:24:37,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:24:37,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:24:37,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:24:37,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:24:37,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:24:37,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:24:37,470 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:24:37,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:24:37,471 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:24:37,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:24:37,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:24:37,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:24:37,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:24:37,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:24:37,472 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:24:37,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:24:37,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:24:37,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:24:37,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:24:37,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:24:37,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:24:37,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:24:37,480 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:24:37,481 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:24:37,481 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:24:37,481 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_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-12-13 12:24:37,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:24:37,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:24:37,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:24:37,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:24:37,683 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:24:37,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-13 12:24:40,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:24:40,444 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:24:40,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-13 12:24:40,449 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/data/ba62c9cdc/94e4fa6c6ab9404a9b5ba6d792f53505/FLAG153892108 [2022-12-13 12:24:40,459 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/data/ba62c9cdc/94e4fa6c6ab9404a9b5ba6d792f53505 [2022-12-13 12:24:40,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:24:40,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:24:40,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:24:40,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:24:40,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:24:40,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37accc06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40, skipping insertion in model container [2022-12-13 12:24:40,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:24:40,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:24:40,628 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,629 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,630 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,636 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,643 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_0f0824ff-3f4f-43c8-8b2e-9108d539b804/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-13 12:24:40,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:24:40,657 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:24:40,667 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,668 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,668 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,669 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,670 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,671 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 12:24:40,672 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 12:24:40,676 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_0f0824ff-3f4f-43c8-8b2e-9108d539b804/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-13 12:24:40,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:24:40,688 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:24:40,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40 WrapperNode [2022-12-13 12:24:40,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:24:40,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:24:40,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:24:40,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:24:40,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,721 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 179 [2022-12-13 12:24:40,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:24:40,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:24:40,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:24:40,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:24:40,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:24:40,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:24:40,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:24:40,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:24:40,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (1/1) ... [2022-12-13 12:24:40,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:24:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:40,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:24:40,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:24:40,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:24:40,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:24:40,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:24:40,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:24:40,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:24:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:24:40,813 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:24:40,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:24:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:24:40,814 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:24:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:24:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 12:24:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 12:24:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:24:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:24:40,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:24:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:24:40,816 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:24:40,900 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:24:40,903 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:24:41,147 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:24:41,225 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:24:41,225 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:24:41,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:24:41 BoogieIcfgContainer [2022-12-13 12:24:41,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:24:41,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:24:41,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:24:41,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:24:41,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:24:40" (1/3) ... [2022-12-13 12:24:41,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e791b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:24:41, skipping insertion in model container [2022-12-13 12:24:41,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:24:40" (2/3) ... [2022-12-13 12:24:41,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e791b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:24:41, skipping insertion in model container [2022-12-13 12:24:41,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:24:41" (3/3) ... [2022-12-13 12:24:41,233 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-12-13 12:24:41,240 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:24:41,248 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:24:41,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:24:41,249 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:24:41,299 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:24:41,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 154 transitions, 332 flow [2022-12-13 12:24:41,373 INFO L130 PetriNetUnfolder]: 9/151 cut-off events. [2022-12-13 12:24:41,374 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:24:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 9/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-13 12:24:41,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 154 transitions, 332 flow [2022-12-13 12:24:41,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 140 transitions, 298 flow [2022-12-13 12:24:41,385 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:24:41,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 140 transitions, 298 flow [2022-12-13 12:24:41,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 140 transitions, 298 flow [2022-12-13 12:24:41,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 140 transitions, 298 flow [2022-12-13 12:24:41,419 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-12-13 12:24:41,420 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:24:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 9/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2022-12-13 12:24:41,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 1464 [2022-12-13 12:24:45,808 INFO L134 LiptonReduction]: Checked pairs total: 1637 [2022-12-13 12:24:45,808 INFO L136 LiptonReduction]: Total number of compositions: 134 [2022-12-13 12:24:45,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:24:45,822 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;@4e3feaa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:24:45,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 12:24:45,827 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-13 12:24:45,827 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:24:45,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:45,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:45,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash -838178635, now seen corresponding path program 1 times [2022-12-13 12:24:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898332246] [2022-12-13 12:24:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:46,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898332246] [2022-12-13 12:24:46,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898332246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:24:46,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:24:46,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:24:46,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89941598] [2022-12-13 12:24:46,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:24:46,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:24:46,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:24:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:24:46,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 288 [2022-12-13 12:24:46,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:46,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 288 [2022-12-13 12:24:46,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:46,306 INFO L130 PetriNetUnfolder]: 169/271 cut-off events. [2022-12-13 12:24:46,306 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-12-13 12:24:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 271 events. 169/271 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 653 event pairs, 108 based on Foata normal form. 8/235 useless extension candidates. Maximal degree in co-relation 372. Up to 217 conditions per place. [2022-12-13 12:24:46,308 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 21 selfloop transitions, 2 changer transitions 11/34 dead transitions. [2022-12-13 12:24:46,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 163 flow [2022-12-13 12:24:46,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:24:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:24:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2022-12-13 12:24:46,319 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4904513888888889 [2022-12-13 12:24:46,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2022-12-13 12:24:46,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2022-12-13 12:24:46,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:46,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2022-12-13 12:24:46,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,331 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,332 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 4 states and 565 transitions. [2022-12-13 12:24:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 163 flow [2022-12-13 12:24:46,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:24:46,336 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 68 flow [2022-12-13 12:24:46,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2022-12-13 12:24:46,340 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -1 predicate places. [2022-12-13 12:24:46,340 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 68 flow [2022-12-13 12:24:46,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:46,341 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:24:46,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2014307932, now seen corresponding path program 1 times [2022-12-13 12:24:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863777781] [2022-12-13 12:24:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:46,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863777781] [2022-12-13 12:24:46,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863777781] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:46,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602844741] [2022-12-13 12:24:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:46,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:46,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:46,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:46,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:24:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:46,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 12:24:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:46,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:46,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602844741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:24:46,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:24:46,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-13 12:24:46,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246400797] [2022-12-13 12:24:46,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:24:46,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:24:46,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:46,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:24:46,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-13 12:24:46,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 288 [2022-12-13 12:24:46,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 68 flow. Second operand has 12 states, 12 states have (on average 130.83333333333334) internal successors, (1570), 12 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:46,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:46,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 288 [2022-12-13 12:24:46,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:46,997 INFO L130 PetriNetUnfolder]: 203/328 cut-off events. [2022-12-13 12:24:46,997 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-12-13 12:24:46,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779 conditions, 328 events. 203/328 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 898 event pairs, 108 based on Foata normal form. 30/356 useless extension candidates. Maximal degree in co-relation 767. Up to 217 conditions per place. [2022-12-13 12:24:46,999 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 21 selfloop transitions, 3 changer transitions 24/48 dead transitions. [2022-12-13 12:24:47,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 48 transitions, 228 flow [2022-12-13 12:24:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:24:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:24:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 820 transitions. [2022-12-13 12:24:47,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2022-12-13 12:24:47,005 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 820 transitions. [2022-12-13 12:24:47,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 820 transitions. [2022-12-13 12:24:47,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:47,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 820 transitions. [2022-12-13 12:24:47,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:47,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:47,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:47,013 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 68 flow. Second operand 6 states and 820 transitions. [2022-12-13 12:24:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 48 transitions, 228 flow [2022-12-13 12:24:47,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 48 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 12:24:47,015 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 92 flow [2022-12-13 12:24:47,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2022-12-13 12:24:47,016 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2022-12-13 12:24:47,016 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 92 flow [2022-12-13 12:24:47,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.83333333333334) internal successors, (1570), 12 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:47,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:47,017 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:47,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:24:47,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:47,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1950819047, now seen corresponding path program 2 times [2022-12-13 12:24:47,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:47,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491055537] [2022-12-13 12:24:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:47,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:48,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491055537] [2022-12-13 12:24:48,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491055537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:48,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274267381] [2022-12-13 12:24:48,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:24:48,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:48,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:48,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:48,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:24:49,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:24:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:24:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:49,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:24:49,313 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 20 treesize of output 22 [2022-12-13 12:24:49,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:49,411 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 86 treesize of output 35 [2022-12-13 12:24:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:24:49,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:24:49,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274267381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:24:49,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:24:49,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-13 12:24:49,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419649849] [2022-12-13 12:24:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:24:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:24:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:24:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:24:49,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 12:24:49,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:49,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:49,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 12:24:49,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:50,050 INFO L130 PetriNetUnfolder]: 169/288 cut-off events. [2022-12-13 12:24:50,050 INFO L131 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2022-12-13 12:24:50,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 288 events. 169/288 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 860 event pairs, 32 based on Foata normal form. 25/312 useless extension candidates. Maximal degree in co-relation 847. Up to 137 conditions per place. [2022-12-13 12:24:50,052 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 50 selfloop transitions, 13 changer transitions 13/76 dead transitions. [2022-12-13 12:24:50,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 76 transitions, 405 flow [2022-12-13 12:24:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:24:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:24:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1015 transitions. [2022-12-13 12:24:50,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4405381944444444 [2022-12-13 12:24:50,055 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1015 transitions. [2022-12-13 12:24:50,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1015 transitions. [2022-12-13 12:24:50,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:50,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1015 transitions. [2022-12-13 12:24:50,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.875) internal successors, (1015), 8 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:50,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:50,060 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:50,060 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 92 flow. Second operand 8 states and 1015 transitions. [2022-12-13 12:24:50,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 76 transitions, 405 flow [2022-12-13 12:24:50,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 76 transitions, 357 flow, removed 22 selfloop flow, removed 4 redundant places. [2022-12-13 12:24:50,062 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 181 flow [2022-12-13 12:24:50,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=181, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2022-12-13 12:24:50,063 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2022-12-13 12:24:50,063 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 181 flow [2022-12-13 12:24:50,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:50,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:50,063 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:50,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:24:50,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:50,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2122861785, now seen corresponding path program 3 times [2022-12-13 12:24:50,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:50,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077064791] [2022-12-13 12:24:50,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:50,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:51,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077064791] [2022-12-13 12:24:51,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077064791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:51,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013623469] [2022-12-13 12:24:51,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:24:51,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:51,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:51,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:24:51,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 12:24:51,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:24:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:51,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:51,784 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 86 treesize of output 35 [2022-12-13 12:24:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:24:51,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:24:51,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013623469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:24:51,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:24:51,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2022-12-13 12:24:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962889158] [2022-12-13 12:24:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:24:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:24:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:51,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:24:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:24:51,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 288 [2022-12-13 12:24:51,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 181 flow. Second operand has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:51,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:51,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 288 [2022-12-13 12:24:51,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:52,170 INFO L130 PetriNetUnfolder]: 245/402 cut-off events. [2022-12-13 12:24:52,170 INFO L131 PetriNetUnfolder]: For 862/862 co-relation queries the response was YES. [2022-12-13 12:24:52,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 402 events. 245/402 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1281 event pairs, 53 based on Foata normal form. 5/406 useless extension candidates. Maximal degree in co-relation 1480. Up to 215 conditions per place. [2022-12-13 12:24:52,172 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2022-12-13 12:24:52,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 86 transitions, 560 flow [2022-12-13 12:24:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:24:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:24:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1050 transitions. [2022-12-13 12:24:52,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557291666666667 [2022-12-13 12:24:52,174 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1050 transitions. [2022-12-13 12:24:52,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1050 transitions. [2022-12-13 12:24:52,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:52,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1050 transitions. [2022-12-13 12:24:52,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.25) internal successors, (1050), 8 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:52,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:52,179 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:52,179 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 181 flow. Second operand 8 states and 1050 transitions. [2022-12-13 12:24:52,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 86 transitions, 560 flow [2022-12-13 12:24:52,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 524 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-12-13 12:24:52,182 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 341 flow [2022-12-13 12:24:52,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=341, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2022-12-13 12:24:52,182 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2022-12-13 12:24:52,182 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 341 flow [2022-12-13 12:24:52,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:52,183 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:52,183 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:52,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:24:52,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:52,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1237927381, now seen corresponding path program 4 times [2022-12-13 12:24:52,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:52,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445759141] [2022-12-13 12:24:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:52,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:53,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445759141] [2022-12-13 12:24:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445759141] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250947198] [2022-12-13 12:24:53,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:24:53,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:53,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:24:53,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:24:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:53,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:24:53,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:24:53,931 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 34 treesize of output 34 [2022-12-13 12:24:53,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:53,992 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 86 treesize of output 35 [2022-12-13 12:24:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:24:54,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:54,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_211 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_211) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))) is different from false [2022-12-13 12:24:54,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:54,293 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 85 treesize of output 103 [2022-12-13 12:24:54,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:54,388 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 20 treesize of output 7 [2022-12-13 12:24:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:24:54,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250947198] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:54,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:24:54,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 28 [2022-12-13 12:24:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56701761] [2022-12-13 12:24:54,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:24:54,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:24:54,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:24:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=727, Unknown=1, NotChecked=54, Total=870 [2022-12-13 12:24:54,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 288 [2022-12-13 12:24:54,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 341 flow. Second operand has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:54,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:54,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 288 [2022-12-13 12:24:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:55,515 INFO L130 PetriNetUnfolder]: 280/480 cut-off events. [2022-12-13 12:24:55,515 INFO L131 PetriNetUnfolder]: For 1566/1566 co-relation queries the response was YES. [2022-12-13 12:24:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 480 events. 280/480 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1773 event pairs, 44 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 2039. Up to 197 conditions per place. [2022-12-13 12:24:55,518 INFO L137 encePairwiseOnDemand]: 272/288 looper letters, 61 selfloop transitions, 27 changer transitions 23/111 dead transitions. [2022-12-13 12:24:55,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 111 transitions, 817 flow [2022-12-13 12:24:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:24:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:24:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1159 transitions. [2022-12-13 12:24:55,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40243055555555557 [2022-12-13 12:24:55,520 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1159 transitions. [2022-12-13 12:24:55,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1159 transitions. [2022-12-13 12:24:55,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:55,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1159 transitions. [2022-12-13 12:24:55,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 115.9) internal successors, (1159), 10 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:55,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 288.0) internal successors, (3168), 11 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:55,525 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 288.0) internal successors, (3168), 11 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:55,525 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 341 flow. Second operand 10 states and 1159 transitions. [2022-12-13 12:24:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 111 transitions, 817 flow [2022-12-13 12:24:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 789 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-12-13 12:24:55,530 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 468 flow [2022-12-13 12:24:55,530 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=468, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-12-13 12:24:55,531 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2022-12-13 12:24:55,531 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 468 flow [2022-12-13 12:24:55,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:55,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:55,531 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:55,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:24:55,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:55,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 984153321, now seen corresponding path program 5 times [2022-12-13 12:24:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:55,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266254424] [2022-12-13 12:24:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:57,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:57,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266254424] [2022-12-13 12:24:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266254424] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232800612] [2022-12-13 12:24:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:24:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:57,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:57,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:24:57,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:24:57,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:24:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:57,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:57,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 35 [2022-12-13 12:24:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:57,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:57,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:24:57,784 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 58 treesize of output 76 [2022-12-13 12:24:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232800612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:24:58,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:24:58,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-13 12:24:58,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893249377] [2022-12-13 12:24:58,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:24:58,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 12:24:58,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 12:24:58,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-12-13 12:25:00,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 288 [2022-12-13 12:25:00,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 468 flow. Second operand has 31 states, 31 states have (on average 108.03225806451613) internal successors, (3349), 31 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:00,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:00,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 288 [2022-12-13 12:25:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:02,812 INFO L130 PetriNetUnfolder]: 663/1120 cut-off events. [2022-12-13 12:25:02,812 INFO L131 PetriNetUnfolder]: For 5979/5979 co-relation queries the response was YES. [2022-12-13 12:25:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5678 conditions, 1120 events. 663/1120 cut-off events. For 5979/5979 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5141 event pairs, 87 based on Foata normal form. 2/1120 useless extension candidates. Maximal degree in co-relation 5642. Up to 266 conditions per place. [2022-12-13 12:25:02,818 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 122 selfloop transitions, 86 changer transitions 26/234 dead transitions. [2022-12-13 12:25:02,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 234 transitions, 2189 flow [2022-12-13 12:25:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:25:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:25:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2185 transitions. [2022-12-13 12:25:02,822 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3993055555555556 [2022-12-13 12:25:02,822 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2185 transitions. [2022-12-13 12:25:02,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2185 transitions. [2022-12-13 12:25:02,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:02,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2185 transitions. [2022-12-13 12:25:02,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 115.0) internal successors, (2185), 19 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) [2022-12-13 12:25:02,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:02,830 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:02,830 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 468 flow. Second operand 19 states and 2185 transitions. [2022-12-13 12:25:02,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 234 transitions, 2189 flow [2022-12-13 12:25:02,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 234 transitions, 1881 flow, removed 115 selfloop flow, removed 7 redundant places. [2022-12-13 12:25:02,841 INFO L231 Difference]: Finished difference. Result has 86 places, 125 transitions, 1332 flow [2022-12-13 12:25:02,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1332, PETRI_PLACES=86, PETRI_TRANSITIONS=125} [2022-12-13 12:25:02,841 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2022-12-13 12:25:02,841 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 125 transitions, 1332 flow [2022-12-13 12:25:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 108.03225806451613) internal successors, (3349), 31 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:02,842 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:02,843 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:02,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:25:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:25:03,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -2099108661, now seen corresponding path program 6 times [2022-12-13 12:25:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:03,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121445416] [2022-12-13 12:25:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:04,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121445416] [2022-12-13 12:25:04,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121445416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:04,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457968443] [2022-12-13 12:25:04,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:25:04,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:04,174 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:04,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:25:04,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 12:25:04,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:04,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:25:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:04,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:04,417 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 86 treesize of output 35 [2022-12-13 12:25:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:04,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:04,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457968443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:04,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:04,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2022-12-13 12:25:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025673140] [2022-12-13 12:25:04,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:04,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:25:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:25:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:25:04,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 288 [2022-12-13 12:25:04,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 125 transitions, 1332 flow. Second operand has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:04,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:04,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 288 [2022-12-13 12:25:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:04,922 INFO L130 PetriNetUnfolder]: 675/1156 cut-off events. [2022-12-13 12:25:04,922 INFO L131 PetriNetUnfolder]: For 10409/10409 co-relation queries the response was YES. [2022-12-13 12:25:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6732 conditions, 1156 events. 675/1156 cut-off events. For 10409/10409 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5420 event pairs, 120 based on Foata normal form. 2/1157 useless extension candidates. Maximal degree in co-relation 6682. Up to 699 conditions per place. [2022-12-13 12:25:04,929 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 101 selfloop transitions, 55 changer transitions 13/169 dead transitions. [2022-12-13 12:25:04,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 169 transitions, 1965 flow [2022-12-13 12:25:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1053 transitions. [2022-12-13 12:25:04,931 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45703125 [2022-12-13 12:25:04,931 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1053 transitions. [2022-12-13 12:25:04,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1053 transitions. [2022-12-13 12:25:04,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:04,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1053 transitions. [2022-12-13 12:25:04,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.625) internal successors, (1053), 8 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:04,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:04,934 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:04,934 INFO L175 Difference]: Start difference. First operand has 86 places, 125 transitions, 1332 flow. Second operand 8 states and 1053 transitions. [2022-12-13 12:25:04,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 169 transitions, 1965 flow [2022-12-13 12:25:04,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 169 transitions, 1879 flow, removed 41 selfloop flow, removed 4 redundant places. [2022-12-13 12:25:04,955 INFO L231 Difference]: Finished difference. Result has 90 places, 132 transitions, 1492 flow [2022-12-13 12:25:04,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=90, PETRI_TRANSITIONS=132} [2022-12-13 12:25:04,956 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2022-12-13 12:25:04,957 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 132 transitions, 1492 flow [2022-12-13 12:25:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:04,957 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:04,957 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:04,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:25:05,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:25:05,159 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash 758674197, now seen corresponding path program 7 times [2022-12-13 12:25:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765507902] [2022-12-13 12:25:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:05,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:06,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:06,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765507902] [2022-12-13 12:25:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765507902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:06,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183434348] [2022-12-13 12:25:06,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:25:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:06,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:06,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:06,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:25:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 12:25:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:06,607 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 33 treesize of output 33 [2022-12-13 12:25:06,732 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-12-13 12:25:06,733 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 85 treesize of output 41 [2022-12-13 12:25:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:06,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:07,067 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:25:07,067 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 86 treesize of output 105 [2022-12-13 12:25:07,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:07,072 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 20 treesize of output 7 [2022-12-13 12:25:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:08,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183434348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:25:08,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:25:08,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-13 12:25:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979301452] [2022-12-13 12:25:08,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:25:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:25:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:25:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=933, Unknown=1, NotChecked=0, Total=1056 [2022-12-13 12:25:08,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 288 [2022-12-13 12:25:08,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 132 transitions, 1492 flow. Second operand has 33 states, 33 states have (on average 90.9090909090909) internal successors, (3000), 33 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:08,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:08,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 288 [2022-12-13 12:25:08,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:11,943 INFO L130 PetriNetUnfolder]: 855/1588 cut-off events. [2022-12-13 12:25:11,944 INFO L131 PetriNetUnfolder]: For 18484/18484 co-relation queries the response was YES. [2022-12-13 12:25:11,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 1588 events. 855/1588 cut-off events. For 18484/18484 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8879 event pairs, 178 based on Foata normal form. 2/1589 useless extension candidates. Maximal degree in co-relation 9467. Up to 475 conditions per place. [2022-12-13 12:25:11,953 INFO L137 encePairwiseOnDemand]: 276/288 looper letters, 225 selfloop transitions, 74 changer transitions 13/312 dead transitions. [2022-12-13 12:25:11,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 312 transitions, 3326 flow [2022-12-13 12:25:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:25:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:25:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2443 transitions. [2022-12-13 12:25:11,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3393055555555556 [2022-12-13 12:25:11,966 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2443 transitions. [2022-12-13 12:25:11,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2443 transitions. [2022-12-13 12:25:11,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:11,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2443 transitions. [2022-12-13 12:25:11,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 97.72) internal successors, (2443), 25 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:11,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 288.0) internal successors, (7488), 26 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:11,976 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 288.0) internal successors, (7488), 26 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:11,976 INFO L175 Difference]: Start difference. First operand has 90 places, 132 transitions, 1492 flow. Second operand 25 states and 2443 transitions. [2022-12-13 12:25:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 312 transitions, 3326 flow [2022-12-13 12:25:12,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 312 transitions, 3198 flow, removed 25 selfloop flow, removed 4 redundant places. [2022-12-13 12:25:12,003 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1944 flow [2022-12-13 12:25:12,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1944, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2022-12-13 12:25:12,003 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2022-12-13 12:25:12,004 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1944 flow [2022-12-13 12:25:12,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 90.9090909090909) internal successors, (3000), 33 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:12,004 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:12,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:12,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:12,206 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 804437613, now seen corresponding path program 8 times [2022-12-13 12:25:12,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:12,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373237657] [2022-12-13 12:25:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:12,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373237657] [2022-12-13 12:25:12,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373237657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:12,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:12,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:25:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714473897] [2022-12-13 12:25:12,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:12,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:25:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:12,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:25:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:25:12,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 288 [2022-12-13 12:25:12,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1944 flow. Second operand has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:12,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 288 [2022-12-13 12:25:12,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:12,572 INFO L130 PetriNetUnfolder]: 670/1252 cut-off events. [2022-12-13 12:25:12,572 INFO L131 PetriNetUnfolder]: For 23304/23304 co-relation queries the response was YES. [2022-12-13 12:25:12,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7978 conditions, 1252 events. 670/1252 cut-off events. For 23304/23304 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6535 event pairs, 153 based on Foata normal form. 66/1317 useless extension candidates. Maximal degree in co-relation 7901. Up to 591 conditions per place. [2022-12-13 12:25:12,588 INFO L137 encePairwiseOnDemand]: 284/288 looper letters, 107 selfloop transitions, 48 changer transitions 1/156 dead transitions. [2022-12-13 12:25:12,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 156 transitions, 2117 flow [2022-12-13 12:25:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:25:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 12:25:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 575 transitions. [2022-12-13 12:25:12,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4991319444444444 [2022-12-13 12:25:12,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 575 transitions. [2022-12-13 12:25:12,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 575 transitions. [2022-12-13 12:25:12,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:12,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 575 transitions. [2022-12-13 12:25:12,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.75) internal successors, (575), 4 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,592 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,592 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1944 flow. Second operand 4 states and 575 transitions. [2022-12-13 12:25:12,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 156 transitions, 2117 flow [2022-12-13 12:25:12,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1995 flow, removed 38 selfloop flow, removed 10 redundant places. [2022-12-13 12:25:12,627 INFO L231 Difference]: Finished difference. Result has 106 places, 144 transitions, 1740 flow [2022-12-13 12:25:12,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1740, PETRI_PLACES=106, PETRI_TRANSITIONS=144} [2022-12-13 12:25:12,628 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2022-12-13 12:25:12,628 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 144 transitions, 1740 flow [2022-12-13 12:25:12,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:12,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:12,629 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:12,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 12:25:12,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2008076011, now seen corresponding path program 9 times [2022-12-13 12:25:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210931694] [2022-12-13 12:25:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:12,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:13,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210931694] [2022-12-13 12:25:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210931694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495726115] [2022-12-13 12:25:13,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:25:13,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:13,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:13,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:13,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:25:13,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 12:25:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 12:25:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:13,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:13,464 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 86 treesize of output 35 [2022-12-13 12:25:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:13,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495726115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:13,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:13,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2022-12-13 12:25:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210628750] [2022-12-13 12:25:13,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:25:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:25:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:25:13,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 288 [2022-12-13 12:25:13,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 144 transitions, 1740 flow. Second operand has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:13,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:13,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 288 [2022-12-13 12:25:13,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:13,937 INFO L130 PetriNetUnfolder]: 712/1337 cut-off events. [2022-12-13 12:25:13,937 INFO L131 PetriNetUnfolder]: For 18985/18985 co-relation queries the response was YES. [2022-12-13 12:25:13,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8718 conditions, 1337 events. 712/1337 cut-off events. For 18985/18985 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7160 event pairs, 158 based on Foata normal form. 2/1338 useless extension candidates. Maximal degree in co-relation 8046. Up to 981 conditions per place. [2022-12-13 12:25:13,944 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 128 selfloop transitions, 46 changer transitions 13/187 dead transitions. [2022-12-13 12:25:13,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 187 transitions, 2462 flow [2022-12-13 12:25:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1048 transitions. [2022-12-13 12:25:13,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2022-12-13 12:25:13,947 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1048 transitions. [2022-12-13 12:25:13,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1048 transitions. [2022-12-13 12:25:13,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:13,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1048 transitions. [2022-12-13 12:25:13,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.0) internal successors, (1048), 8 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:13,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:13,950 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:13,951 INFO L175 Difference]: Start difference. First operand has 106 places, 144 transitions, 1740 flow. Second operand 8 states and 1048 transitions. [2022-12-13 12:25:13,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 187 transitions, 2462 flow [2022-12-13 12:25:13,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 2380 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-12-13 12:25:13,983 INFO L231 Difference]: Finished difference. Result has 110 places, 155 transitions, 1960 flow [2022-12-13 12:25:13,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1960, PETRI_PLACES=110, PETRI_TRANSITIONS=155} [2022-12-13 12:25:13,983 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2022-12-13 12:25:13,984 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 155 transitions, 1960 flow [2022-12-13 12:25:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.5) internal successors, (996), 8 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:13,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:13,984 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:13,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:14,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:25:14,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 712858339, now seen corresponding path program 10 times [2022-12-13 12:25:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:14,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442536374] [2022-12-13 12:25:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:14,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:15,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442536374] [2022-12-13 12:25:15,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442536374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:15,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198114982] [2022-12-13 12:25:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:25:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:15,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:15,421 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:25:15,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:25:15,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:15,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 12:25:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:15,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:15,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 35 [2022-12-13 12:25:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:15,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:16,032 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:16,032 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 56 treesize of output 74 [2022-12-13 12:25:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198114982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:25:16,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:25:16,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-13 12:25:16,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189452479] [2022-12-13 12:25:16,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:25:16,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 12:25:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 12:25:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-12-13 12:25:18,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 288 [2022-12-13 12:25:18,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 155 transitions, 1960 flow. Second operand has 31 states, 31 states have (on average 108.03225806451613) internal successors, (3349), 31 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:18,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:18,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 288 [2022-12-13 12:25:18,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:20,858 INFO L130 PetriNetUnfolder]: 781/1527 cut-off events. [2022-12-13 12:25:20,858 INFO L131 PetriNetUnfolder]: For 17819/17819 co-relation queries the response was YES. [2022-12-13 12:25:20,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9691 conditions, 1527 events. 781/1527 cut-off events. For 17819/17819 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8866 event pairs, 174 based on Foata normal form. 2/1528 useless extension candidates. Maximal degree in co-relation 9604. Up to 724 conditions per place. [2022-12-13 12:25:20,866 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 154 selfloop transitions, 84 changer transitions 26/264 dead transitions. [2022-12-13 12:25:20,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 264 transitions, 3309 flow [2022-12-13 12:25:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 12:25:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 12:25:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2157 transitions. [2022-12-13 12:25:20,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39418859649122806 [2022-12-13 12:25:20,869 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2157 transitions. [2022-12-13 12:25:20,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2157 transitions. [2022-12-13 12:25:20,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:20,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2157 transitions. [2022-12-13 12:25:20,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 113.52631578947368) internal successors, (2157), 19 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) [2022-12-13 12:25:20,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:20,875 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:20,875 INFO L175 Difference]: Start difference. First operand has 110 places, 155 transitions, 1960 flow. Second operand 19 states and 2157 transitions. [2022-12-13 12:25:20,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 264 transitions, 3309 flow [2022-12-13 12:25:20,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 264 transitions, 3184 flow, removed 19 selfloop flow, removed 6 redundant places. [2022-12-13 12:25:20,904 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 2372 flow [2022-12-13 12:25:20,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2372, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2022-12-13 12:25:20,905 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2022-12-13 12:25:20,905 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 2372 flow [2022-12-13 12:25:20,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 108.03225806451613) internal successors, (3349), 31 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:20,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:20,905 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:20,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:21,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:21,107 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1077502039, now seen corresponding path program 11 times [2022-12-13 12:25:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995501164] [2022-12-13 12:25:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:21,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:22,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995501164] [2022-12-13 12:25:22,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995501164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439630614] [2022-12-13 12:25:22,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:25:22,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:22,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:22,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:25:22,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:25:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:25:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:22,334 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 34 treesize of output 34 [2022-12-13 12:25:22,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:22,389 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 86 treesize of output 35 [2022-12-13 12:25:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:25:22,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:22,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:22,614 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 87 treesize of output 105 [2022-12-13 12:25:22,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:22,819 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 20 treesize of output 7 [2022-12-13 12:25:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:22,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439630614] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:22,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:25:22,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 9] total 28 [2022-12-13 12:25:22,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115490631] [2022-12-13 12:25:22,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:22,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:22,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=774, Unknown=5, NotChecked=0, Total=870 [2022-12-13 12:25:23,128 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 288 [2022-12-13 12:25:23,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 2372 flow. Second operand has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:23,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:23,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 288 [2022-12-13 12:25:23,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:23,930 INFO L130 PetriNetUnfolder]: 779/1539 cut-off events. [2022-12-13 12:25:23,930 INFO L131 PetriNetUnfolder]: For 22848/22848 co-relation queries the response was YES. [2022-12-13 12:25:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 1539 events. 779/1539 cut-off events. For 22848/22848 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9100 event pairs, 174 based on Foata normal form. 2/1540 useless extension candidates. Maximal degree in co-relation 10260. Up to 967 conditions per place. [2022-12-13 12:25:23,938 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 137 selfloop transitions, 59 changer transitions 23/219 dead transitions. [2022-12-13 12:25:23,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 219 transitions, 3105 flow [2022-12-13 12:25:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:25:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:25:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1043 transitions. [2022-12-13 12:25:23,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40239197530864196 [2022-12-13 12:25:23,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1043 transitions. [2022-12-13 12:25:23,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1043 transitions. [2022-12-13 12:25:23,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:23,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1043 transitions. [2022-12-13 12:25:23,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.88888888888889) internal successors, (1043), 9 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) [2022-12-13 12:25:23,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:23,942 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:23,942 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 2372 flow. Second operand 9 states and 1043 transitions. [2022-12-13 12:25:23,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 219 transitions, 3105 flow [2022-12-13 12:25:23,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 2998 flow, removed 50 selfloop flow, removed 5 redundant places. [2022-12-13 12:25:23,981 INFO L231 Difference]: Finished difference. Result has 134 places, 171 transitions, 2329 flow [2022-12-13 12:25:23,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2329, PETRI_PLACES=134, PETRI_TRANSITIONS=171} [2022-12-13 12:25:23,982 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2022-12-13 12:25:23,982 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 171 transitions, 2329 flow [2022-12-13 12:25:23,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:23,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:23,982 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:23,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:25:24,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:24,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1621720427, now seen corresponding path program 12 times [2022-12-13 12:25:24,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:24,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630988352] [2022-12-13 12:25:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:24,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:25,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630988352] [2022-12-13 12:25:25,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630988352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:25,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965773583] [2022-12-13 12:25:25,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:25:25,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:25,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:25,181 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:25,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:25:25,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 12:25:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:25:25,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:25,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:25,411 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 21 treesize of output 23 [2022-12-13 12:25:25,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:25,481 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 21 treesize of output 23 [2022-12-13 12:25:25,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:25,575 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 86 treesize of output 35 [2022-12-13 12:25:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:25,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:25,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965773583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:25,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:25,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2022-12-13 12:25:25,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378653960] [2022-12-13 12:25:25,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:25,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:25:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:25,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:25:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:25:25,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 288 [2022-12-13 12:25:25,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 171 transitions, 2329 flow. Second operand has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:25,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:25,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 288 [2022-12-13 12:25:25,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:26,414 INFO L130 PetriNetUnfolder]: 796/1545 cut-off events. [2022-12-13 12:25:26,414 INFO L131 PetriNetUnfolder]: For 24179/24179 co-relation queries the response was YES. [2022-12-13 12:25:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10584 conditions, 1545 events. 796/1545 cut-off events. For 24179/24179 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8992 event pairs, 156 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 10491. Up to 902 conditions per place. [2022-12-13 12:25:26,430 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 138 selfloop transitions, 63 changer transitions 13/214 dead transitions. [2022-12-13 12:25:26,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 214 transitions, 3097 flow [2022-12-13 12:25:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 995 transitions. [2022-12-13 12:25:26,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4318576388888889 [2022-12-13 12:25:26,431 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 995 transitions. [2022-12-13 12:25:26,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 995 transitions. [2022-12-13 12:25:26,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:26,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 995 transitions. [2022-12-13 12:25:26,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.375) internal successors, (995), 8 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:26,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:26,434 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:26,434 INFO L175 Difference]: Start difference. First operand has 134 places, 171 transitions, 2329 flow. Second operand 8 states and 995 transitions. [2022-12-13 12:25:26,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 214 transitions, 3097 flow [2022-12-13 12:25:26,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 214 transitions, 2949 flow, removed 15 selfloop flow, removed 8 redundant places. [2022-12-13 12:25:26,475 INFO L231 Difference]: Finished difference. Result has 133 places, 177 transitions, 2468 flow [2022-12-13 12:25:26,475 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2468, PETRI_PLACES=133, PETRI_TRANSITIONS=177} [2022-12-13 12:25:26,476 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 104 predicate places. [2022-12-13 12:25:26,476 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 177 transitions, 2468 flow [2022-12-13 12:25:26,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:26,476 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:26,476 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:26,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:25:26,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:25:26,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:26,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2033792825, now seen corresponding path program 13 times [2022-12-13 12:25:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:26,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270296639] [2022-12-13 12:25:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:26,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270296639] [2022-12-13 12:25:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270296639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:27,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902644650] [2022-12-13 12:25:27,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:25:27,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:27,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:27,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:27,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:25:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:25:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:27,966 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 21 treesize of output 23 [2022-12-13 12:25:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:28,090 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 34 treesize of output 34 [2022-12-13 12:25:28,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:28,162 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 86 treesize of output 35 [2022-12-13 12:25:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:25:28,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:28,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:28,596 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 168 treesize of output 186 [2022-12-13 12:25:28,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2022-12-13 12:25:28,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:28,625 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 71 treesize of output 77 [2022-12-13 12:25:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:29,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902644650] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:29,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:25:29,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 10] total 30 [2022-12-13 12:25:29,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487644464] [2022-12-13 12:25:29,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:29,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:25:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:29,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:25:29,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=884, Unknown=10, NotChecked=0, Total=992 [2022-12-13 12:25:29,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 288 [2022-12-13 12:25:29,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 177 transitions, 2468 flow. Second operand has 11 states, 11 states have (on average 105.81818181818181) internal successors, (1164), 11 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:29,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:29,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 288 [2022-12-13 12:25:29,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:31,018 INFO L130 PetriNetUnfolder]: 790/1538 cut-off events. [2022-12-13 12:25:31,018 INFO L131 PetriNetUnfolder]: For 23686/23686 co-relation queries the response was YES. [2022-12-13 12:25:31,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10685 conditions, 1538 events. 790/1538 cut-off events. For 23686/23686 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8944 event pairs, 161 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 10594. Up to 903 conditions per place. [2022-12-13 12:25:31,026 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 131 selfloop transitions, 82 changer transitions 19/232 dead transitions. [2022-12-13 12:25:31,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 232 transitions, 3379 flow [2022-12-13 12:25:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:25:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:25:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1336 transitions. [2022-12-13 12:25:31,028 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38657407407407407 [2022-12-13 12:25:31,028 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1336 transitions. [2022-12-13 12:25:31,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1336 transitions. [2022-12-13 12:25:31,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:31,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1336 transitions. [2022-12-13 12:25:31,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 111.33333333333333) internal successors, (1336), 12 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:31,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 288.0) internal successors, (3744), 13 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:31,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 288.0) internal successors, (3744), 13 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:31,031 INFO L175 Difference]: Start difference. First operand has 133 places, 177 transitions, 2468 flow. Second operand 12 states and 1336 transitions. [2022-12-13 12:25:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 232 transitions, 3379 flow [2022-12-13 12:25:31,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 232 transitions, 3286 flow, removed 26 selfloop flow, removed 3 redundant places. [2022-12-13 12:25:31,075 INFO L231 Difference]: Finished difference. Result has 144 places, 181 transitions, 2665 flow [2022-12-13 12:25:31,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2385, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2665, PETRI_PLACES=144, PETRI_TRANSITIONS=181} [2022-12-13 12:25:31,075 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2022-12-13 12:25:31,075 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 181 transitions, 2665 flow [2022-12-13 12:25:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 105.81818181818181) internal successors, (1164), 11 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:31,076 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:31,076 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:31,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:25:31,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 12:25:31,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1121094441, now seen corresponding path program 14 times [2022-12-13 12:25:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300542916] [2022-12-13 12:25:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:32,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300542916] [2022-12-13 12:25:32,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300542916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980704510] [2022-12-13 12:25:32,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:25:32,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:32,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:32,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:32,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:25:32,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 12:25:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:25:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:32,230 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 21 treesize of output 23 [2022-12-13 12:25:32,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:32,330 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 86 treesize of output 35 [2022-12-13 12:25:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:32,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:32,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980704510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:32,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:32,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-13 12:25:32,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975858776] [2022-12-13 12:25:32,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:25:32,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 12:25:32,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 181 transitions, 2665 flow. Second operand has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:32,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:32,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 12:25:32,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:33,028 INFO L130 PetriNetUnfolder]: 817/1570 cut-off events. [2022-12-13 12:25:33,028 INFO L131 PetriNetUnfolder]: For 27023/27023 co-relation queries the response was YES. [2022-12-13 12:25:33,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11331 conditions, 1570 events. 817/1570 cut-off events. For 27023/27023 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9028 event pairs, 167 based on Foata normal form. 2/1571 useless extension candidates. Maximal degree in co-relation 11236. Up to 1179 conditions per place. [2022-12-13 12:25:33,037 INFO L137 encePairwiseOnDemand]: 279/288 looper letters, 159 selfloop transitions, 46 changer transitions 15/220 dead transitions. [2022-12-13 12:25:33,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 220 transitions, 3458 flow [2022-12-13 12:25:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1007 transitions. [2022-12-13 12:25:33,039 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4370659722222222 [2022-12-13 12:25:33,039 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1007 transitions. [2022-12-13 12:25:33,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1007 transitions. [2022-12-13 12:25:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:33,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1007 transitions. [2022-12-13 12:25:33,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:33,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:33,042 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:33,042 INFO L175 Difference]: Start difference. First operand has 144 places, 181 transitions, 2665 flow. Second operand 8 states and 1007 transitions. [2022-12-13 12:25:33,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 220 transitions, 3458 flow [2022-12-13 12:25:33,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 220 transitions, 3221 flow, removed 43 selfloop flow, removed 9 redundant places. [2022-12-13 12:25:33,091 INFO L231 Difference]: Finished difference. Result has 140 places, 186 transitions, 2645 flow [2022-12-13 12:25:33,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2645, PETRI_PLACES=140, PETRI_TRANSITIONS=186} [2022-12-13 12:25:33,091 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2022-12-13 12:25:33,091 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 186 transitions, 2645 flow [2022-12-13 12:25:33,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:33,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:33,092 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:33,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:25:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:25:33,293 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -418168571, now seen corresponding path program 15 times [2022-12-13 12:25:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:33,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107289797] [2022-12-13 12:25:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107289797] [2022-12-13 12:25:33,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107289797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:33,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394585672] [2022-12-13 12:25:33,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:25:33,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:33,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:33,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:25:34,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 12:25:34,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 12:25:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:34,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:34,202 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 21 treesize of output 23 [2022-12-13 12:25:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:34,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394585672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:34,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2022-12-13 12:25:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902691003] [2022-12-13 12:25:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:34,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:34,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-12-13 12:25:34,580 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 288 [2022-12-13 12:25:34,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 186 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 120.0) internal successors, (1200), 10 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:34,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:34,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 288 [2022-12-13 12:25:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:35,120 INFO L130 PetriNetUnfolder]: 840/1613 cut-off events. [2022-12-13 12:25:35,120 INFO L131 PetriNetUnfolder]: For 25783/25783 co-relation queries the response was YES. [2022-12-13 12:25:35,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11452 conditions, 1613 events. 840/1613 cut-off events. For 25783/25783 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9352 event pairs, 162 based on Foata normal form. 3/1615 useless extension candidates. Maximal degree in co-relation 11360. Up to 1103 conditions per place. [2022-12-13 12:25:35,129 INFO L137 encePairwiseOnDemand]: 279/288 looper letters, 157 selfloop transitions, 48 changer transitions 19/224 dead transitions. [2022-12-13 12:25:35,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 3434 flow [2022-12-13 12:25:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1011 transitions. [2022-12-13 12:25:35,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4388020833333333 [2022-12-13 12:25:35,130 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1011 transitions. [2022-12-13 12:25:35,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1011 transitions. [2022-12-13 12:25:35,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:35,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1011 transitions. [2022-12-13 12:25:35,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.375) internal successors, (1011), 8 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:35,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:35,133 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:35,133 INFO L175 Difference]: Start difference. First operand has 140 places, 186 transitions, 2645 flow. Second operand 8 states and 1011 transitions. [2022-12-13 12:25:35,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 3434 flow [2022-12-13 12:25:35,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 224 transitions, 3345 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-13 12:25:35,178 INFO L231 Difference]: Finished difference. Result has 143 places, 189 transitions, 2754 flow [2022-12-13 12:25:35,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2754, PETRI_PLACES=143, PETRI_TRANSITIONS=189} [2022-12-13 12:25:35,178 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2022-12-13 12:25:35,178 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 189 transitions, 2754 flow [2022-12-13 12:25:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 120.0) internal successors, (1200), 10 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:35,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:35,179 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:35,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:35,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 12:25:35,379 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1306891975, now seen corresponding path program 16 times [2022-12-13 12:25:35,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93546297] [2022-12-13 12:25:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:35,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:36,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93546297] [2022-12-13 12:25:36,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93546297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:36,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599455931] [2022-12-13 12:25:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:25:36,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:36,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:36,344 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:36,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:25:36,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:25:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 12:25:36,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:36,705 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 34 treesize of output 34 [2022-12-13 12:25:36,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:36,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 35 [2022-12-13 12:25:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:36,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:37,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:37,082 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 87 treesize of output 105 [2022-12-13 12:25:37,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:37,314 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 20 treesize of output 7 [2022-12-13 12:25:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599455931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:25:37,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:25:37,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2022-12-13 12:25:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624290125] [2022-12-13 12:25:37,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:25:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:25:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:25:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=939, Unknown=3, NotChecked=0, Total=1056 [2022-12-13 12:25:38,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 288 [2022-12-13 12:25:38,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 189 transitions, 2754 flow. Second operand has 33 states, 33 states have (on average 90.9090909090909) internal successors, (3000), 33 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:38,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:38,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 288 [2022-12-13 12:25:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:42,787 INFO L130 PetriNetUnfolder]: 1090/2065 cut-off events. [2022-12-13 12:25:42,787 INFO L131 PetriNetUnfolder]: For 34473/34473 co-relation queries the response was YES. [2022-12-13 12:25:42,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15131 conditions, 2065 events. 1090/2065 cut-off events. For 34473/34473 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12449 event pairs, 178 based on Foata normal form. 3/2064 useless extension candidates. Maximal degree in co-relation 15019. Up to 614 conditions per place. [2022-12-13 12:25:42,799 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 243 selfloop transitions, 114 changer transitions 37/394 dead transitions. [2022-12-13 12:25:42,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 394 transitions, 5478 flow [2022-12-13 12:25:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 12:25:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 12:25:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2982 transitions. [2022-12-13 12:25:42,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.334005376344086 [2022-12-13 12:25:42,803 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2982 transitions. [2022-12-13 12:25:42,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2982 transitions. [2022-12-13 12:25:42,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:42,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2982 transitions. [2022-12-13 12:25:42,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 96.19354838709677) internal successors, (2982), 31 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 288.0) internal successors, (9216), 32 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,812 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 288.0) internal successors, (9216), 32 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,812 INFO L175 Difference]: Start difference. First operand has 143 places, 189 transitions, 2754 flow. Second operand 31 states and 2982 transitions. [2022-12-13 12:25:42,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 394 transitions, 5478 flow [2022-12-13 12:25:42,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 394 transitions, 5268 flow, removed 58 selfloop flow, removed 7 redundant places. [2022-12-13 12:25:42,886 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 3785 flow [2022-12-13 12:25:42,886 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3785, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2022-12-13 12:25:42,886 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 146 predicate places. [2022-12-13 12:25:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 3785 flow [2022-12-13 12:25:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 90.9090909090909) internal successors, (3000), 33 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:42,887 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:42,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:43,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 12:25:43,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:43,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:43,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2131062578, now seen corresponding path program 17 times [2022-12-13 12:25:43,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:43,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591694330] [2022-12-13 12:25:43,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:43,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:43,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:43,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591694330] [2022-12-13 12:25:43,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591694330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:43,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359351027] [2022-12-13 12:25:43,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:25:43,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:43,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:43,844 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:43,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:25:43,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 12:25:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:25:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:44,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:44,102 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 34 treesize of output 34 [2022-12-13 12:25:44,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:44,155 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 86 treesize of output 35 [2022-12-13 12:25:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:25:44,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359351027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:44,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2022-12-13 12:25:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220267706] [2022-12-13 12:25:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:44,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:44,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:25:44,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 12:25:44,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 3785 flow. Second operand has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:44,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:44,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 12:25:44,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:44,986 INFO L130 PetriNetUnfolder]: 1095/2042 cut-off events. [2022-12-13 12:25:44,986 INFO L131 PetriNetUnfolder]: For 35432/35432 co-relation queries the response was YES. [2022-12-13 12:25:44,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15493 conditions, 2042 events. 1095/2042 cut-off events. For 35432/35432 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11945 event pairs, 220 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 15420. Up to 1521 conditions per place. [2022-12-13 12:25:45,000 INFO L137 encePairwiseOnDemand]: 279/288 looper letters, 199 selfloop transitions, 61 changer transitions 16/276 dead transitions. [2022-12-13 12:25:45,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 276 transitions, 4706 flow [2022-12-13 12:25:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:45,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2022-12-13 12:25:45,001 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4383680555555556 [2022-12-13 12:25:45,002 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2022-12-13 12:25:45,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2022-12-13 12:25:45,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:45,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2022-12-13 12:25:45,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:45,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:45,004 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:45,004 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 3785 flow. Second operand 8 states and 1010 transitions. [2022-12-13 12:25:45,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 276 transitions, 4706 flow [2022-12-13 12:25:45,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 276 transitions, 4508 flow, removed 71 selfloop flow, removed 15 redundant places. [2022-12-13 12:25:45,100 INFO L231 Difference]: Finished difference. Result has 165 places, 239 transitions, 3809 flow [2022-12-13 12:25:45,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3809, PETRI_PLACES=165, PETRI_TRANSITIONS=239} [2022-12-13 12:25:45,101 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2022-12-13 12:25:45,101 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 239 transitions, 3809 flow [2022-12-13 12:25:45,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:45,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:45,101 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:45,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:45,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 12:25:45,302 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -545887122, now seen corresponding path program 18 times [2022-12-13 12:25:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152964140] [2022-12-13 12:25:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:46,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:46,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152964140] [2022-12-13 12:25:46,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152964140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:46,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714244152] [2022-12-13 12:25:46,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:25:46,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:46,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:46,489 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:46,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:25:46,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-13 12:25:46,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:25:46,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:25:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:46,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:46,791 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 34 treesize of output 34 [2022-12-13 12:25:46,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:46,859 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 86 treesize of output 35 [2022-12-13 12:25:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:25:46,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:25:46,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714244152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:46,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:25:46,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2022-12-13 12:25:46,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474059837] [2022-12-13 12:25:46,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:46,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:46,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:46,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:46,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-12-13 12:25:47,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 12:25:47,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 239 transitions, 3809 flow. Second operand has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:47,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:47,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 12:25:47,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:47,654 INFO L130 PetriNetUnfolder]: 1090/2032 cut-off events. [2022-12-13 12:25:47,655 INFO L131 PetriNetUnfolder]: For 31803/31803 co-relation queries the response was YES. [2022-12-13 12:25:47,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15186 conditions, 2032 events. 1090/2032 cut-off events. For 31803/31803 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11895 event pairs, 212 based on Foata normal form. 1/2032 useless extension candidates. Maximal degree in co-relation 15071. Up to 1201 conditions per place. [2022-12-13 12:25:47,666 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 189 selfloop transitions, 70 changer transitions 17/276 dead transitions. [2022-12-13 12:25:47,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 276 transitions, 4637 flow [2022-12-13 12:25:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:25:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:25:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1013 transitions. [2022-12-13 12:25:47,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396701388888889 [2022-12-13 12:25:47,667 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1013 transitions. [2022-12-13 12:25:47,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1013 transitions. [2022-12-13 12:25:47,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:47,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1013 transitions. [2022-12-13 12:25:47,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.625) internal successors, (1013), 8 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:47,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:47,670 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:47,670 INFO L175 Difference]: Start difference. First operand has 165 places, 239 transitions, 3809 flow. Second operand 8 states and 1013 transitions. [2022-12-13 12:25:47,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 276 transitions, 4637 flow [2022-12-13 12:25:47,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 276 transitions, 4516 flow, removed 15 selfloop flow, removed 7 redundant places. [2022-12-13 12:25:47,752 INFO L231 Difference]: Finished difference. Result has 165 places, 237 transitions, 3842 flow [2022-12-13 12:25:47,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3699, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3842, PETRI_PLACES=165, PETRI_TRANSITIONS=237} [2022-12-13 12:25:47,753 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2022-12-13 12:25:47,753 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 237 transitions, 3842 flow [2022-12-13 12:25:47,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 119.0) internal successors, (1190), 10 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:47,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:47,753 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:47,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 12:25:47,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:47,955 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash -738270141, now seen corresponding path program 1 times [2022-12-13 12:25:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772841315] [2022-12-13 12:25:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772841315] [2022-12-13 12:25:48,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772841315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:48,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:48,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780699268] [2022-12-13 12:25:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:48,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:48,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2022-12-13 12:25:48,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 237 transitions, 3842 flow. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:48,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2022-12-13 12:25:48,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:48,549 INFO L130 PetriNetUnfolder]: 1114/2078 cut-off events. [2022-12-13 12:25:48,549 INFO L131 PetriNetUnfolder]: For 31179/31179 co-relation queries the response was YES. [2022-12-13 12:25:48,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15466 conditions, 2078 events. 1114/2078 cut-off events. For 31179/31179 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12252 event pairs, 129 based on Foata normal form. 72/2149 useless extension candidates. Maximal degree in co-relation 15352. Up to 1098 conditions per place. [2022-12-13 12:25:48,561 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 212 selfloop transitions, 83 changer transitions 0/295 dead transitions. [2022-12-13 12:25:48,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 295 transitions, 5085 flow [2022-12-13 12:25:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:25:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:25:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 843 transitions. [2022-12-13 12:25:48,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2022-12-13 12:25:48,562 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 843 transitions. [2022-12-13 12:25:48,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 843 transitions. [2022-12-13 12:25:48,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:48,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 843 transitions. [2022-12-13 12:25:48,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 140.5) internal successors, (843), 6 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,565 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,565 INFO L175 Difference]: Start difference. First operand has 165 places, 237 transitions, 3842 flow. Second operand 6 states and 843 transitions. [2022-12-13 12:25:48,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 295 transitions, 5085 flow [2022-12-13 12:25:48,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 295 transitions, 4899 flow, removed 24 selfloop flow, removed 8 redundant places. [2022-12-13 12:25:48,650 INFO L231 Difference]: Finished difference. Result has 162 places, 248 transitions, 4098 flow [2022-12-13 12:25:48,650 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4098, PETRI_PLACES=162, PETRI_TRANSITIONS=248} [2022-12-13 12:25:48,651 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2022-12-13 12:25:48,651 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 248 transitions, 4098 flow [2022-12-13 12:25:48,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:48,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 12:25:48,651 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1230559675, now seen corresponding path program 2 times [2022-12-13 12:25:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:48,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22846939] [2022-12-13 12:25:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:48,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:48,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22846939] [2022-12-13 12:25:48,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22846939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:48,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:48,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:48,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955743354] [2022-12-13 12:25:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:48,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:48,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:48,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2022-12-13 12:25:48,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 248 transitions, 4098 flow. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:48,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:48,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2022-12-13 12:25:48,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:49,171 INFO L130 PetriNetUnfolder]: 886/1774 cut-off events. [2022-12-13 12:25:49,172 INFO L131 PetriNetUnfolder]: For 29441/29441 co-relation queries the response was YES. [2022-12-13 12:25:49,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13223 conditions, 1774 events. 886/1774 cut-off events. For 29441/29441 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10867 event pairs, 253 based on Foata normal form. 112/1885 useless extension candidates. Maximal degree in co-relation 12785. Up to 1112 conditions per place. [2022-12-13 12:25:49,184 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 164 selfloop transitions, 52 changer transitions 26/242 dead transitions. [2022-12-13 12:25:49,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 242 transitions, 4141 flow [2022-12-13 12:25:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:25:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:25:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2022-12-13 12:25:49,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4847222222222222 [2022-12-13 12:25:49,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2022-12-13 12:25:49,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2022-12-13 12:25:49,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:49,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2022-12-13 12:25:49,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,189 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,189 INFO L175 Difference]: Start difference. First operand has 162 places, 248 transitions, 4098 flow. Second operand 5 states and 698 transitions. [2022-12-13 12:25:49,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 242 transitions, 4141 flow [2022-12-13 12:25:49,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 242 transitions, 3982 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-12-13 12:25:49,298 INFO L231 Difference]: Finished difference. Result has 162 places, 195 transitions, 3134 flow [2022-12-13 12:25:49,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3134, PETRI_PLACES=162, PETRI_TRANSITIONS=195} [2022-12-13 12:25:49,298 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2022-12-13 12:25:49,298 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 195 transitions, 3134 flow [2022-12-13 12:25:49,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:49,299 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:49,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 12:25:49,299 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1985998229, now seen corresponding path program 3 times [2022-12-13 12:25:49,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:49,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335872329] [2022-12-13 12:25:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:49,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335872329] [2022-12-13 12:25:49,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335872329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:49,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:49,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976363410] [2022-12-13 12:25:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:49,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:49,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:49,381 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2022-12-13 12:25:49,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 195 transitions, 3134 flow. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:49,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2022-12-13 12:25:49,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:49,696 INFO L130 PetriNetUnfolder]: 829/1585 cut-off events. [2022-12-13 12:25:49,696 INFO L131 PetriNetUnfolder]: For 26156/26156 co-relation queries the response was YES. [2022-12-13 12:25:49,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11962 conditions, 1585 events. 829/1585 cut-off events. For 26156/26156 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8906 event pairs, 238 based on Foata normal form. 30/1614 useless extension candidates. Maximal degree in co-relation 11762. Up to 1142 conditions per place. [2022-12-13 12:25:49,705 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 159 selfloop transitions, 57 changer transitions 4/220 dead transitions. [2022-12-13 12:25:49,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 220 transitions, 3708 flow [2022-12-13 12:25:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:25:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:25:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2022-12-13 12:25:49,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4840277777777778 [2022-12-13 12:25:49,706 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2022-12-13 12:25:49,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2022-12-13 12:25:49,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:49,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2022-12-13 12:25:49,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,708 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,708 INFO L175 Difference]: Start difference. First operand has 162 places, 195 transitions, 3134 flow. Second operand 5 states and 697 transitions. [2022-12-13 12:25:49,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 220 transitions, 3708 flow [2022-12-13 12:25:49,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 220 transitions, 3530 flow, removed 40 selfloop flow, removed 10 redundant places. [2022-12-13 12:25:49,786 INFO L231 Difference]: Finished difference. Result has 149 places, 188 transitions, 2885 flow [2022-12-13 12:25:49,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2885, PETRI_PLACES=149, PETRI_TRANSITIONS=188} [2022-12-13 12:25:49,786 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2022-12-13 12:25:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 188 transitions, 2885 flow [2022-12-13 12:25:49,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:49,786 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 12:25:49,787 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1640827309, now seen corresponding path program 1 times [2022-12-13 12:25:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664643383] [2022-12-13 12:25:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:49,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:49,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664643383] [2022-12-13 12:25:49,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664643383] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:49,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:49,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926042570] [2022-12-13 12:25:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:49,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 288 [2022-12-13 12:25:49,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 188 transitions, 2885 flow. Second operand has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:49,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:49,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 288 [2022-12-13 12:25:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:50,177 INFO L130 PetriNetUnfolder]: 748/1396 cut-off events. [2022-12-13 12:25:50,177 INFO L131 PetriNetUnfolder]: For 18810/18810 co-relation queries the response was YES. [2022-12-13 12:25:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10127 conditions, 1396 events. 748/1396 cut-off events. For 18810/18810 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7374 event pairs, 204 based on Foata normal form. 18/1413 useless extension candidates. Maximal degree in co-relation 9993. Up to 990 conditions per place. [2022-12-13 12:25:50,184 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 139 selfloop transitions, 51 changer transitions 8/198 dead transitions. [2022-12-13 12:25:50,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 198 transitions, 3196 flow [2022-12-13 12:25:50,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:25:50,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:25:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 821 transitions. [2022-12-13 12:25:50,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47511574074074076 [2022-12-13 12:25:50,186 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 821 transitions. [2022-12-13 12:25:50,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 821 transitions. [2022-12-13 12:25:50,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:50,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 821 transitions. [2022-12-13 12:25:50,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,188 INFO L175 Difference]: Start difference. First operand has 149 places, 188 transitions, 2885 flow. Second operand 6 states and 821 transitions. [2022-12-13 12:25:50,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 198 transitions, 3196 flow [2022-12-13 12:25:50,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 3072 flow, removed 26 selfloop flow, removed 6 redundant places. [2022-12-13 12:25:50,248 INFO L231 Difference]: Finished difference. Result has 146 places, 169 transitions, 2509 flow [2022-12-13 12:25:50,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2509, PETRI_PLACES=146, PETRI_TRANSITIONS=169} [2022-12-13 12:25:50,248 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2022-12-13 12:25:50,248 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 169 transitions, 2509 flow [2022-12-13 12:25:50,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:50,249 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 12:25:50,249 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash -155018949, now seen corresponding path program 2 times [2022-12-13 12:25:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:50,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127609117] [2022-12-13 12:25:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:50,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:50,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:50,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127609117] [2022-12-13 12:25:50,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127609117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:50,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:50,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:50,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553251262] [2022-12-13 12:25:50,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:50,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:50,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:50,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 288 [2022-12-13 12:25:50,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 169 transitions, 2509 flow. Second operand has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:50,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 288 [2022-12-13 12:25:50,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:50,595 INFO L130 PetriNetUnfolder]: 723/1353 cut-off events. [2022-12-13 12:25:50,595 INFO L131 PetriNetUnfolder]: For 17464/17464 co-relation queries the response was YES. [2022-12-13 12:25:50,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9582 conditions, 1353 events. 723/1353 cut-off events. For 17464/17464 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7070 event pairs, 208 based on Foata normal form. 18/1370 useless extension candidates. Maximal degree in co-relation 9273. Up to 882 conditions per place. [2022-12-13 12:25:50,604 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 141 selfloop transitions, 42 changer transitions 6/189 dead transitions. [2022-12-13 12:25:50,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 2966 flow [2022-12-13 12:25:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:25:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:25:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2022-12-13 12:25:50,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-12-13 12:25:50,606 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2022-12-13 12:25:50,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2022-12-13 12:25:50,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:50,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2022-12-13 12:25:50,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,608 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,608 INFO L175 Difference]: Start difference. First operand has 146 places, 169 transitions, 2509 flow. Second operand 5 states and 696 transitions. [2022-12-13 12:25:50,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 2966 flow [2022-12-13 12:25:50,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 189 transitions, 2783 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-12-13 12:25:50,657 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 2216 flow [2022-12-13 12:25:50,657 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2216, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2022-12-13 12:25:50,657 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2022-12-13 12:25:50,658 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 2216 flow [2022-12-13 12:25:50,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.2) internal successors, (661), 5 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:50,658 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:50,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 12:25:50,658 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1300429213, now seen corresponding path program 3 times [2022-12-13 12:25:50,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:50,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232317830] [2022-12-13 12:25:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:50,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:50,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:50,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232317830] [2022-12-13 12:25:50,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232317830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:50,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:50,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:25:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436520658] [2022-12-13 12:25:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:25:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:25:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:25:50,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2022-12-13 12:25:50,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 2216 flow. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:50,750 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2022-12-13 12:25:50,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:50,970 INFO L130 PetriNetUnfolder]: 651/1183 cut-off events. [2022-12-13 12:25:50,970 INFO L131 PetriNetUnfolder]: For 12406/12406 co-relation queries the response was YES. [2022-12-13 12:25:50,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8065 conditions, 1183 events. 651/1183 cut-off events. For 12406/12406 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5771 event pairs, 180 based on Foata normal form. 18/1200 useless extension candidates. Maximal degree in co-relation 7923. Up to 882 conditions per place. [2022-12-13 12:25:50,976 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 122 selfloop transitions, 28 changer transitions 15/165 dead transitions. [2022-12-13 12:25:50,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 165 transitions, 2442 flow [2022-12-13 12:25:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:25:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 12:25:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2022-12-13 12:25:50,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2022-12-13 12:25:50,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2022-12-13 12:25:50,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2022-12-13 12:25:50,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:50,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2022-12-13 12:25:50,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,979 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:50,979 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 2216 flow. Second operand 5 states and 692 transitions. [2022-12-13 12:25:50,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 165 transitions, 2442 flow [2022-12-13 12:25:51,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 165 transitions, 2297 flow, removed 16 selfloop flow, removed 11 redundant places. [2022-12-13 12:25:51,017 INFO L231 Difference]: Finished difference. Result has 128 places, 134 transitions, 1732 flow [2022-12-13 12:25:51,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1732, PETRI_PLACES=128, PETRI_TRANSITIONS=134} [2022-12-13 12:25:51,017 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2022-12-13 12:25:51,017 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 134 transitions, 1732 flow [2022-12-13 12:25:51,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:51,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:51,017 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:51,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 12:25:51,018 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1059080666, now seen corresponding path program 19 times [2022-12-13 12:25:51,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:51,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295209767] [2022-12-13 12:25:51,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:51,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:52,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295209767] [2022-12-13 12:25:52,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295209767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:52,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294592696] [2022-12-13 12:25:52,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:25:52,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:52,124 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:52,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:25:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:25:52,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:25:52,346 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 20 treesize of output 22 [2022-12-13 12:25:52,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:52,420 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 86 treesize of output 35 [2022-12-13 12:25:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:25:52,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:52,545 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1075 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1075) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread2Thread1of1ForFork0_~x~1#1| 4294967296))) (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296)))))) is different from false [2022-12-13 12:25:52,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:52,596 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 112 treesize of output 130 [2022-12-13 12:25:52,621 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:52,621 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 58 treesize of output 64 [2022-12-13 12:25:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:25:52,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294592696] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:52,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:25:52,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 9] total 29 [2022-12-13 12:25:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290470298] [2022-12-13 12:25:52,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:52,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:25:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:25:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2022-12-13 12:25:52,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 288 [2022-12-13 12:25:52,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 134 transitions, 1732 flow. Second operand has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:52,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:52,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 288 [2022-12-13 12:25:52,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:55,545 INFO L130 PetriNetUnfolder]: 637/1151 cut-off events. [2022-12-13 12:25:55,545 INFO L131 PetriNetUnfolder]: For 11071/11071 co-relation queries the response was YES. [2022-12-13 12:25:55,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7470 conditions, 1151 events. 637/1151 cut-off events. For 11071/11071 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5429 event pairs, 143 based on Foata normal form. 1/1151 useless extension candidates. Maximal degree in co-relation 7430. Up to 485 conditions per place. [2022-12-13 12:25:55,551 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 99 selfloop transitions, 51 changer transitions 23/173 dead transitions. [2022-12-13 12:25:55,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 173 transitions, 2321 flow [2022-12-13 12:25:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:25:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 12:25:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1038 transitions. [2022-12-13 12:25:55,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40046296296296297 [2022-12-13 12:25:55,553 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1038 transitions. [2022-12-13 12:25:55,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1038 transitions. [2022-12-13 12:25:55,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:55,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1038 transitions. [2022-12-13 12:25:55,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.33333333333333) internal successors, (1038), 9 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:55,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:55,556 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:55,556 INFO L175 Difference]: Start difference. First operand has 128 places, 134 transitions, 1732 flow. Second operand 9 states and 1038 transitions. [2022-12-13 12:25:55,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 173 transitions, 2321 flow [2022-12-13 12:25:55,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 2232 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-12-13 12:25:55,581 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 1713 flow [2022-12-13 12:25:55,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1649, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1713, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2022-12-13 12:25:55,582 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2022-12-13 12:25:55,582 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 1713 flow [2022-12-13 12:25:55,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:55,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:55,582 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:55,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 12:25:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 12:25:55,784 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2115479501, now seen corresponding path program 1 times [2022-12-13 12:25:55,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:55,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099025669] [2022-12-13 12:25:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099025669] [2022-12-13 12:25:56,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099025669] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:25:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359000186] [2022-12-13 12:25:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:56,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:25:56,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:25:56,649 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:25:56,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:25:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 12:25:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:25:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:57,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:25:57,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:25:57,281 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 58 treesize of output 76 [2022-12-13 12:25:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359000186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:25:58,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:25:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2022-12-13 12:25:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838177598] [2022-12-13 12:25:58,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:25:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:25:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:25:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 12:26:00,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 288 [2022-12-13 12:26:00,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 1713 flow. Second operand has 36 states, 36 states have (on average 112.91666666666667) internal successors, (4065), 36 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:00,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:26:00,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 288 [2022-12-13 12:26:00,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:26:11,244 WARN L233 SmtUtils]: Spent 10.89s on a formula simplification. DAG size of input: 113 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:26:23,141 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification. DAG size of input: 129 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:26:36,792 WARN L233 SmtUtils]: Spent 13.16s on a formula simplification. DAG size of input: 90 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:26:49,968 WARN L233 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 101 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:27:05,379 WARN L233 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 120 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:27:28,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:27:29,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:27:31,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:27:36,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:27:48,022 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 108 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:28:05,031 WARN L233 SmtUtils]: Spent 16.33s on a formula simplification. DAG size of input: 126 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:28:07,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:28:23,208 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 137 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:28:41,255 WARN L233 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 123 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:28:43,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:28:45,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:08,445 WARN L233 SmtUtils]: Spent 15.86s on a formula simplification. DAG size of input: 151 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:29:11,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:13,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:15,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:17,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:29,852 WARN L233 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 153 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:29:40,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:43,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:29:51,127 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 137 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:29:51,232 INFO L130 PetriNetUnfolder]: 1175/2040 cut-off events. [2022-12-13 12:29:51,232 INFO L131 PetriNetUnfolder]: For 19332/19332 co-relation queries the response was YES. [2022-12-13 12:29:51,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13463 conditions, 2040 events. 1175/2040 cut-off events. For 19332/19332 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10823 event pairs, 94 based on Foata normal form. 3/2042 useless extension candidates. Maximal degree in co-relation 13422. Up to 448 conditions per place. [2022-12-13 12:29:51,242 INFO L137 encePairwiseOnDemand]: 269/288 looper letters, 238 selfloop transitions, 206 changer transitions 39/483 dead transitions. [2022-12-13 12:29:51,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 483 transitions, 5731 flow [2022-12-13 12:29:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 12:29:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-12-13 12:29:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 6025 transitions. [2022-12-13 12:29:51,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4101988017429194 [2022-12-13 12:29:51,247 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 6025 transitions. [2022-12-13 12:29:51,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 6025 transitions. [2022-12-13 12:29:51,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:29:51,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 6025 transitions. [2022-12-13 12:29:51,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 118.13725490196079) internal successors, (6025), 51 states have internal predecessors, (6025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:51,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 288.0) internal successors, (14976), 52 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:51,260 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 288.0) internal successors, (14976), 52 states have internal predecessors, (14976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:51,260 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 1713 flow. Second operand 51 states and 6025 transitions. [2022-12-13 12:29:51,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 483 transitions, 5731 flow [2022-12-13 12:29:51,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 483 transitions, 5525 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-12-13 12:29:51,304 INFO L231 Difference]: Finished difference. Result has 194 places, 277 transitions, 4209 flow [2022-12-13 12:29:51,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4209, PETRI_PLACES=194, PETRI_TRANSITIONS=277} [2022-12-13 12:29:51,304 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2022-12-13 12:29:51,304 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 277 transitions, 4209 flow [2022-12-13 12:29:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 112.91666666666667) internal successors, (4065), 36 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:29:51,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:29:51,305 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:29:51,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 12:29:51,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 12:29:51,506 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:29:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:29:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1231694753, now seen corresponding path program 2 times [2022-12-13 12:29:51,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:29:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954683620] [2022-12-13 12:29:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:29:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:29:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:29:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:52,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:29:52,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954683620] [2022-12-13 12:29:52,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954683620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:29:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414773812] [2022-12-13 12:29:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:29:52,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:29:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:29:52,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:29:52,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:29:52,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:29:52,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:29:52,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 12:29:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:29:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:29:53,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:29:53,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:29:53,681 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 58 treesize of output 76 [2022-12-13 12:30:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:04,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414773812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:04,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:30:04,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2022-12-13 12:30:04,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714601443] [2022-12-13 12:30:04,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:04,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 12:30:04,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:30:04,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 12:30:04,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 12:30:08,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:30:14,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 288 [2022-12-13 12:30:14,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 277 transitions, 4209 flow. Second operand has 37 states, 37 states have (on average 104.86486486486487) internal successors, (3880), 37 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:14,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:30:14,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 288 [2022-12-13 12:30:14,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:30:22,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:30:30,092 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 129 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:30:42,714 INFO L130 PetriNetUnfolder]: 1280/2379 cut-off events. [2022-12-13 12:30:42,715 INFO L131 PetriNetUnfolder]: For 32227/32227 co-relation queries the response was YES. [2022-12-13 12:30:42,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18056 conditions, 2379 events. 1280/2379 cut-off events. For 32227/32227 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14049 event pairs, 201 based on Foata normal form. 2/2380 useless extension candidates. Maximal degree in co-relation 17989. Up to 606 conditions per place. [2022-12-13 12:30:42,730 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 268 selfloop transitions, 149 changer transitions 26/443 dead transitions. [2022-12-13 12:30:42,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 443 transitions, 6582 flow [2022-12-13 12:30:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 12:30:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 12:30:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2897 transitions. [2022-12-13 12:30:42,747 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3868856837606838 [2022-12-13 12:30:42,747 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2897 transitions. [2022-12-13 12:30:42,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2897 transitions. [2022-12-13 12:30:42,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:30:42,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2897 transitions. [2022-12-13 12:30:42,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.42307692307692) internal successors, (2897), 26 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:42,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 288.0) internal successors, (7776), 27 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:42,754 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 288.0) internal successors, (7776), 27 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:42,754 INFO L175 Difference]: Start difference. First operand has 194 places, 277 transitions, 4209 flow. Second operand 26 states and 2897 transitions. [2022-12-13 12:30:42,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 443 transitions, 6582 flow [2022-12-13 12:30:42,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 443 transitions, 5928 flow, removed 206 selfloop flow, removed 16 redundant places. [2022-12-13 12:30:42,858 INFO L231 Difference]: Finished difference. Result has 209 places, 300 transitions, 4316 flow [2022-12-13 12:30:42,859 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3640, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4316, PETRI_PLACES=209, PETRI_TRANSITIONS=300} [2022-12-13 12:30:42,859 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2022-12-13 12:30:42,859 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 300 transitions, 4316 flow [2022-12-13 12:30:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 104.86486486486487) internal successors, (3880), 37 states have internal predecessors, (3880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:30:42,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:30:42,860 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:30:42,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 12:30:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 12:30:43,061 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:30:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:30:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1345878921, now seen corresponding path program 3 times [2022-12-13 12:30:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:30:43,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590104837] [2022-12-13 12:30:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:30:43,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:30:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:30:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:30:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590104837] [2022-12-13 12:30:44,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590104837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:30:44,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637975568] [2022-12-13 12:30:44,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:30:44,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:30:44,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:30:44,328 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:30:44,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:30:44,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:30:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:30:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 12:30:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:30:44,535 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 [2022-12-13 12:30:44,581 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 [2022-12-13 12:30:44,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:30:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:30:44,767 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 24 [2022-12-13 12:30:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:45,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:30:46,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:30:46,196 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 131 treesize of output 95 [2022-12-13 12:30:46,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:30:46,268 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 18188 treesize of output 16504 [2022-12-13 12:30:46,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:30:46,374 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 16452 treesize of output 15184 [2022-12-13 12:30:46,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:30:46,489 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 15132 treesize of output 12544 [2022-12-13 12:30:46,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:30:46,589 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 12492 treesize of output 10310 [2022-12-13 12:30:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:30:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637975568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:30:52,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:30:52,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:30:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515095417] [2022-12-13 12:30:52,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:30:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:30:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:30:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:30:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1349, Unknown=7, NotChecked=0, Total=1560 [2022-12-13 12:30:54,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:57,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:30:59,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:31:00,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:31:00,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 300 transitions, 4316 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:00,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:31:00,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:31:00,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:31:12,560 WARN L233 SmtUtils]: Spent 12.17s on a formula simplification. DAG size of input: 76 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:31:18,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:31:24,226 WARN L233 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 161 DAG size of output: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:31:27,566 INFO L130 PetriNetUnfolder]: 1633/2952 cut-off events. [2022-12-13 12:31:27,566 INFO L131 PetriNetUnfolder]: For 46480/46480 co-relation queries the response was YES. [2022-12-13 12:31:27,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22285 conditions, 2952 events. 1633/2952 cut-off events. For 46480/46480 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17855 event pairs, 240 based on Foata normal form. 3/2954 useless extension candidates. Maximal degree in co-relation 22212. Up to 1199 conditions per place. [2022-12-13 12:31:27,586 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 396 selfloop transitions, 212 changer transitions 32/640 dead transitions. [2022-12-13 12:31:27,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 640 transitions, 10164 flow [2022-12-13 12:31:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 12:31:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 12:31:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3376 transitions. [2022-12-13 12:31:27,590 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3256172839506173 [2022-12-13 12:31:27,590 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3376 transitions. [2022-12-13 12:31:27,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3376 transitions. [2022-12-13 12:31:27,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:31:27,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3376 transitions. [2022-12-13 12:31:27,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 93.77777777777777) internal successors, (3376), 36 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:27,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 288.0) internal successors, (10656), 37 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:27,598 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 288.0) internal successors, (10656), 37 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:27,598 INFO L175 Difference]: Start difference. First operand has 209 places, 300 transitions, 4316 flow. Second operand 36 states and 3376 transitions. [2022-12-13 12:31:27,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 640 transitions, 10164 flow [2022-12-13 12:31:27,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 640 transitions, 9908 flow, removed 41 selfloop flow, removed 11 redundant places. [2022-12-13 12:31:27,767 INFO L231 Difference]: Finished difference. Result has 253 places, 424 transitions, 7239 flow [2022-12-13 12:31:27,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7239, PETRI_PLACES=253, PETRI_TRANSITIONS=424} [2022-12-13 12:31:27,768 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2022-12-13 12:31:27,768 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 424 transitions, 7239 flow [2022-12-13 12:31:27,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:27,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:31:27,768 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:27,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 12:31:27,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 12:31:27,969 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:31:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash -524638581, now seen corresponding path program 4 times [2022-12-13 12:31:27,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072319894] [2022-12-13 12:31:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:27,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:28,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:28,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072319894] [2022-12-13 12:31:28,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072319894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:31:28,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160647802] [2022-12-13 12:31:28,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:31:28,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:28,902 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:28,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 12:31:28,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:31:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 12:31:28,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:31:29,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:29,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:31:29,325 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 58 treesize of output 76 [2022-12-13 12:31:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:31:37,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160647802] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:31:37,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:31:37,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2022-12-13 12:31:37,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251870494] [2022-12-13 12:31:37,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:37,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 12:31:37,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:37,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 12:31:37,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=672, Unknown=1, NotChecked=0, Total=756 [2022-12-13 12:31:40,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:31:40,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 288 [2022-12-13 12:31:40,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 424 transitions, 7239 flow. Second operand has 28 states, 28 states have (on average 114.14285714285714) internal successors, (3196), 28 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:40,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:31:40,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 288 [2022-12-13 12:31:40,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:31:44,867 INFO L130 PetriNetUnfolder]: 1641/2971 cut-off events. [2022-12-13 12:31:44,867 INFO L131 PetriNetUnfolder]: For 50731/50731 co-relation queries the response was YES. [2022-12-13 12:31:44,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23865 conditions, 2971 events. 1641/2971 cut-off events. For 50731/50731 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17964 event pairs, 274 based on Foata normal form. 3/2974 useless extension candidates. Maximal degree in co-relation 23771. Up to 1420 conditions per place. [2022-12-13 12:31:44,887 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 304 selfloop transitions, 238 changer transitions 26/568 dead transitions. [2022-12-13 12:31:44,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 568 transitions, 10330 flow [2022-12-13 12:31:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 12:31:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 12:31:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3229 transitions. [2022-12-13 12:31:44,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41525205761316875 [2022-12-13 12:31:44,891 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3229 transitions. [2022-12-13 12:31:44,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3229 transitions. [2022-12-13 12:31:44,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:31:44,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3229 transitions. [2022-12-13 12:31:44,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 119.5925925925926) internal successors, (3229), 27 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:44,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 288.0) internal successors, (8064), 28 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:44,901 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 288.0) internal successors, (8064), 28 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:44,901 INFO L175 Difference]: Start difference. First operand has 253 places, 424 transitions, 7239 flow. Second operand 27 states and 3229 transitions. [2022-12-13 12:31:44,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 568 transitions, 10330 flow [2022-12-13 12:31:45,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 568 transitions, 9317 flow, removed 483 selfloop flow, removed 11 redundant places. [2022-12-13 12:31:45,120 INFO L231 Difference]: Finished difference. Result has 269 places, 438 transitions, 7677 flow [2022-12-13 12:31:45,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=6822, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7677, PETRI_PLACES=269, PETRI_TRANSITIONS=438} [2022-12-13 12:31:45,121 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2022-12-13 12:31:45,121 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 438 transitions, 7677 flow [2022-12-13 12:31:45,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 114.14285714285714) internal successors, (3196), 28 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:45,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:31:45,121 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:31:45,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 12:31:45,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:45,322 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:31:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:31:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2018142047, now seen corresponding path program 5 times [2022-12-13 12:31:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:31:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149100835] [2022-12-13 12:31:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:31:45,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:31:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:31:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:31:46,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149100835] [2022-12-13 12:31:46,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149100835] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:31:46,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500593620] [2022-12-13 12:31:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:31:46,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:31:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:31:46,238 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:31:46,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 12:31:46,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:31:46,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:31:46,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:31:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:31:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:46,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:31:47,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:31:47,014 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 60 treesize of output 78 [2022-12-13 12:31:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:31:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500593620] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:31:49,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:31:49,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 12:31:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123105296] [2022-12-13 12:31:49,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:31:49,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:31:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:31:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:31:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1029, Unknown=1, NotChecked=0, Total=1190 [2022-12-13 12:31:51,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 288 [2022-12-13 12:31:51,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 438 transitions, 7677 flow. Second operand has 35 states, 35 states have (on average 112.97142857142858) internal successors, (3954), 35 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:31:51,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:31:51,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 288 [2022-12-13 12:31:51,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:31:59,553 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 74 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:32:05,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:27,656 WARN L233 SmtUtils]: Spent 21.62s on a formula simplification. DAG size of input: 99 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:32:33,795 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 99 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:32:35,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:37,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:39,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:42,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:45,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:32:50,185 INFO L130 PetriNetUnfolder]: 1742/3199 cut-off events. [2022-12-13 12:32:50,185 INFO L131 PetriNetUnfolder]: For 51776/51776 co-relation queries the response was YES. [2022-12-13 12:32:50,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25399 conditions, 3199 events. 1742/3199 cut-off events. For 51776/51776 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19988 event pairs, 256 based on Foata normal form. 2/3201 useless extension candidates. Maximal degree in co-relation 25303. Up to 795 conditions per place. [2022-12-13 12:32:50,207 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 307 selfloop transitions, 273 changer transitions 26/606 dead transitions. [2022-12-13 12:32:50,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 606 transitions, 10586 flow [2022-12-13 12:32:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:32:50,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:32:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2981 transitions. [2022-12-13 12:32:50,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4140277777777778 [2022-12-13 12:32:50,210 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2981 transitions. [2022-12-13 12:32:50,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2981 transitions. [2022-12-13 12:32:50,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:32:50,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2981 transitions. [2022-12-13 12:32:50,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 119.24) internal successors, (2981), 25 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:50,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 288.0) internal successors, (7488), 26 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:50,217 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 288.0) internal successors, (7488), 26 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:50,217 INFO L175 Difference]: Start difference. First operand has 269 places, 438 transitions, 7677 flow. Second operand 25 states and 2981 transitions. [2022-12-13 12:32:50,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 606 transitions, 10586 flow [2022-12-13 12:32:50,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 606 transitions, 10190 flow, removed 38 selfloop flow, removed 20 redundant places. [2022-12-13 12:32:50,489 INFO L231 Difference]: Finished difference. Result has 282 places, 472 transitions, 8694 flow [2022-12-13 12:32:50,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8694, PETRI_PLACES=282, PETRI_TRANSITIONS=472} [2022-12-13 12:32:50,490 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 253 predicate places. [2022-12-13 12:32:50,490 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 472 transitions, 8694 flow [2022-12-13 12:32:50,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 112.97142857142858) internal successors, (3954), 35 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:50,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:32:50,490 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:32:50,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 12:32:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:32:50,692 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:32:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:32:50,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1745444059, now seen corresponding path program 6 times [2022-12-13 12:32:50,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:32:50,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770950091] [2022-12-13 12:32:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:32:50,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:32:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:32:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:32:51,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:32:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770950091] [2022-12-13 12:32:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770950091] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:32:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991167475] [2022-12-13 12:32:51,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:32:51,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:32:51,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:32:51,609 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:32:51,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 12:32:51,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:32:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:32:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:32:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:32:51,771 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 [2022-12-13 12:32:51,810 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 [2022-12-13 12:32:51,849 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 [2022-12-13 12:32:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:32:52,023 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 24 [2022-12-13 12:32:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:32:52,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:32:53,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:32:53,314 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 131 treesize of output 95 [2022-12-13 12:32:53,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:32:53,364 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 2500 treesize of output 2318 [2022-12-13 12:32:53,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:32:53,407 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 2266 treesize of output 1964 [2022-12-13 12:32:53,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:32:53,482 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 1938 treesize of output 1634 [2022-12-13 12:32:53,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:32:53,565 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 1451 treesize of output 1325 [2022-12-13 12:32:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:32:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991167475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:32:55,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:32:55,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:32:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223078050] [2022-12-13 12:32:55,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:32:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:32:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:32:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:32:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1349, Unknown=18, NotChecked=0, Total=1560 [2022-12-13 12:32:56,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:32:56,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 472 transitions, 8694 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:32:56,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:32:56,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:32:56,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:06,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:08,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:21,499 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:33:25,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:27,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:30,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:36,740 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:33:38,895 INFO L130 PetriNetUnfolder]: 1911/3553 cut-off events. [2022-12-13 12:33:38,896 INFO L131 PetriNetUnfolder]: For 67454/67454 co-relation queries the response was YES. [2022-12-13 12:33:38,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28693 conditions, 3553 events. 1911/3553 cut-off events. For 67454/67454 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23204 event pairs, 331 based on Foata normal form. 3/3556 useless extension candidates. Maximal degree in co-relation 28588. Up to 1285 conditions per place. [2022-12-13 12:33:38,922 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 446 selfloop transitions, 303 changer transitions 37/786 dead transitions. [2022-12-13 12:33:38,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 786 transitions, 13960 flow [2022-12-13 12:33:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 12:33:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 12:33:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4320 transitions. [2022-12-13 12:33:38,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2022-12-13 12:33:38,926 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4320 transitions. [2022-12-13 12:33:38,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4320 transitions. [2022-12-13 12:33:38,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:38,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4320 transitions. [2022-12-13 12:33:38,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 93.91304347826087) internal successors, (4320), 46 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:38,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 288.0) internal successors, (13536), 47 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:38,935 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 288.0) internal successors, (13536), 47 states have internal predecessors, (13536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:38,935 INFO L175 Difference]: Start difference. First operand has 282 places, 472 transitions, 8694 flow. Second operand 46 states and 4320 transitions. [2022-12-13 12:33:38,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 786 transitions, 13960 flow [2022-12-13 12:33:39,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 786 transitions, 13773 flow, removed 42 selfloop flow, removed 9 redundant places. [2022-12-13 12:33:39,255 INFO L231 Difference]: Finished difference. Result has 337 places, 530 transitions, 10407 flow [2022-12-13 12:33:39,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=10407, PETRI_PLACES=337, PETRI_TRANSITIONS=530} [2022-12-13 12:33:39,256 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 308 predicate places. [2022-12-13 12:33:39,256 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 530 transitions, 10407 flow [2022-12-13 12:33:39,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:39,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:39,256 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:39,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:39,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 12:33:39,457 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:33:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1244177267, now seen corresponding path program 7 times [2022-12-13 12:33:39,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:39,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669518540] [2022-12-13 12:33:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:39,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:40,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669518540] [2022-12-13 12:33:40,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669518540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207929338] [2022-12-13 12:33:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:33:40,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:40,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:40,532 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:40,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 12:33:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:40,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:33:40,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:33:40,960 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 24 [2022-12-13 12:33:41,236 INFO L321 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2022-12-13 12:33:41,236 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 82 treesize of output 38 [2022-12-13 12:33:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:41,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:41,875 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-12-13 12:33:41,875 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 114 treesize of output 133 [2022-12-13 12:33:41,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:33:41,905 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 61 treesize of output 68 [2022-12-13 12:33:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:43,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207929338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:43,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:43,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 12:33:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612444056] [2022-12-13 12:33:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:43,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 12:33:43,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 12:33:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1255, Unknown=1, NotChecked=0, Total=1406 [2022-12-13 12:33:45,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:33:45,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 288 [2022-12-13 12:33:45,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 530 transitions, 10407 flow. Second operand has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:45,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:45,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 288 [2022-12-13 12:33:45,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:33:52,300 INFO L130 PetriNetUnfolder]: 1898/3521 cut-off events. [2022-12-13 12:33:52,300 INFO L131 PetriNetUnfolder]: For 70132/70132 co-relation queries the response was YES. [2022-12-13 12:33:52,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29854 conditions, 3521 events. 1898/3521 cut-off events. For 70132/70132 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 22671 event pairs, 431 based on Foata normal form. 2/3523 useless extension candidates. Maximal degree in co-relation 29729. Up to 1580 conditions per place. [2022-12-13 12:33:52,329 INFO L137 encePairwiseOnDemand]: 276/288 looper letters, 487 selfloop transitions, 121 changer transitions 17/625 dead transitions. [2022-12-13 12:33:52,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 625 transitions, 12411 flow [2022-12-13 12:33:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:33:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 12:33:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2207 transitions. [2022-12-13 12:33:52,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3483270202020202 [2022-12-13 12:33:52,332 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2207 transitions. [2022-12-13 12:33:52,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2207 transitions. [2022-12-13 12:33:52,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:33:52,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2207 transitions. [2022-12-13 12:33:52,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 100.31818181818181) internal successors, (2207), 22 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:52,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 288.0) internal successors, (6624), 23 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:52,336 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 288.0) internal successors, (6624), 23 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:52,337 INFO L175 Difference]: Start difference. First operand has 337 places, 530 transitions, 10407 flow. Second operand 22 states and 2207 transitions. [2022-12-13 12:33:52,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 625 transitions, 12411 flow [2022-12-13 12:33:52,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 625 transitions, 12078 flow, removed 45 selfloop flow, removed 23 redundant places. [2022-12-13 12:33:52,727 INFO L231 Difference]: Finished difference. Result has 337 places, 531 transitions, 10390 flow [2022-12-13 12:33:52,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=10095, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10390, PETRI_PLACES=337, PETRI_TRANSITIONS=531} [2022-12-13 12:33:52,728 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 308 predicate places. [2022-12-13 12:33:52,728 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 531 transitions, 10390 flow [2022-12-13 12:33:52,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:52,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:33:52,728 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:52,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:52,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 12:33:52,930 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:33:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1402798437, now seen corresponding path program 8 times [2022-12-13 12:33:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032988045] [2022-12-13 12:33:52,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:52,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:54,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032988045] [2022-12-13 12:33:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032988045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:33:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119948958] [2022-12-13 12:33:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:33:54,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:54,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:54,061 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:54,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 12:33:54,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:33:54,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 12:33:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:54,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:33:54,494 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 24 [2022-12-13 12:33:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:54,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:54,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:33:54,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 112 treesize of output 104 [2022-12-13 12:33:54,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:33:54,966 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 58 treesize of output 38 [2022-12-13 12:33:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:33:56,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119948958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:56,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:33:56,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 12:33:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785057946] [2022-12-13 12:33:56,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 12:33:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 12:33:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1240, Unknown=2, NotChecked=0, Total=1406 [2022-12-13 12:33:58,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 288 [2022-12-13 12:33:58,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 531 transitions, 10390 flow. Second operand has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:33:58,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:33:58,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 288 [2022-12-13 12:33:58,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:34:12,305 INFO L130 PetriNetUnfolder]: 2078/3950 cut-off events. [2022-12-13 12:34:12,305 INFO L131 PetriNetUnfolder]: For 76662/76662 co-relation queries the response was YES. [2022-12-13 12:34:12,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32743 conditions, 3950 events. 2078/3950 cut-off events. For 76662/76662 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26738 event pairs, 445 based on Foata normal form. 4/3954 useless extension candidates. Maximal degree in co-relation 32617. Up to 1345 conditions per place. [2022-12-13 12:34:12,338 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 450 selfloop transitions, 291 changer transitions 45/786 dead transitions. [2022-12-13 12:34:12,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 786 transitions, 14578 flow [2022-12-13 12:34:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 12:34:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-12-13 12:34:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3913 transitions. [2022-12-13 12:34:12,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34837962962962965 [2022-12-13 12:34:12,342 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3913 transitions. [2022-12-13 12:34:12,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3913 transitions. [2022-12-13 12:34:12,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:34:12,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3913 transitions. [2022-12-13 12:34:12,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 100.33333333333333) internal successors, (3913), 39 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:12,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 288.0) internal successors, (11520), 40 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:12,351 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 288.0) internal successors, (11520), 40 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:12,351 INFO L175 Difference]: Start difference. First operand has 337 places, 531 transitions, 10390 flow. Second operand 39 states and 3913 transitions. [2022-12-13 12:34:12,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 786 transitions, 14578 flow [2022-12-13 12:34:12,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 786 transitions, 14467 flow, removed 15 selfloop flow, removed 14 redundant places. [2022-12-13 12:34:12,782 INFO L231 Difference]: Finished difference. Result has 378 places, 579 transitions, 12149 flow [2022-12-13 12:34:12,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12149, PETRI_PLACES=378, PETRI_TRANSITIONS=579} [2022-12-13 12:34:12,783 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2022-12-13 12:34:12,783 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 579 transitions, 12149 flow [2022-12-13 12:34:12,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:12,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:34:12,783 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:34:12,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 12:34:12,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:34:12,985 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:34:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:34:12,986 INFO L85 PathProgramCache]: Analyzing trace with hash -464182443, now seen corresponding path program 9 times [2022-12-13 12:34:12,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:34:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448129003] [2022-12-13 12:34:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:34:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:34:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:34:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:13,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:34:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448129003] [2022-12-13 12:34:13,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448129003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:34:13,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022089550] [2022-12-13 12:34:13,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:34:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:34:13,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:34:13,877 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:34:13,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 12:34:13,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:34:13,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:34:13,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:34:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:34:14,086 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 [2022-12-13 12:34:14,141 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 [2022-12-13 12:34:14,177 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 [2022-12-13 12:34:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:34:14,459 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 31 treesize of output 31 [2022-12-13 12:34:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:14,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:34:15,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:15,824 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 128 treesize of output 92 [2022-12-13 12:34:15,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:15,895 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 1212 treesize of output 1162 [2022-12-13 12:34:15,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 898 treesize of output 690 [2022-12-13 12:34:15,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:15,969 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 902 treesize of output 876 [2022-12-13 12:34:16,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:16,041 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 824 treesize of output 720 [2022-12-13 12:34:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:17,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022089550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:34:17,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:34:17,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:34:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814165297] [2022-12-13 12:34:17,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:34:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:34:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:34:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:34:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1377, Unknown=4, NotChecked=0, Total=1560 [2022-12-13 12:34:19,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:34:19,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 579 transitions, 12149 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:19,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:34:19,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:34:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:34:31,365 INFO L130 PetriNetUnfolder]: 2367/4339 cut-off events. [2022-12-13 12:34:31,365 INFO L131 PetriNetUnfolder]: For 106376/106376 co-relation queries the response was YES. [2022-12-13 12:34:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39362 conditions, 4339 events. 2367/4339 cut-off events. For 106376/106376 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28812 event pairs, 485 based on Foata normal form. 3/4342 useless extension candidates. Maximal degree in co-relation 39219. Up to 2111 conditions per place. [2022-12-13 12:34:31,406 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 559 selfloop transitions, 339 changer transitions 45/943 dead transitions. [2022-12-13 12:34:31,406 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 943 transitions, 19936 flow [2022-12-13 12:34:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 12:34:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-13 12:34:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4572 transitions. [2022-12-13 12:34:31,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3239795918367347 [2022-12-13 12:34:31,411 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4572 transitions. [2022-12-13 12:34:31,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4572 transitions. [2022-12-13 12:34:31,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:34:31,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4572 transitions. [2022-12-13 12:34:31,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 93.3061224489796) internal successors, (4572), 49 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:31,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 288.0) internal successors, (14400), 50 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:31,426 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 288.0) internal successors, (14400), 50 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:31,426 INFO L175 Difference]: Start difference. First operand has 378 places, 579 transitions, 12149 flow. Second operand 49 states and 4572 transitions. [2022-12-13 12:34:31,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 943 transitions, 19936 flow [2022-12-13 12:34:32,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 943 transitions, 19728 flow, removed 55 selfloop flow, removed 21 redundant places. [2022-12-13 12:34:32,052 INFO L231 Difference]: Finished difference. Result has 414 places, 703 transitions, 15951 flow [2022-12-13 12:34:32,052 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=11993, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=15951, PETRI_PLACES=414, PETRI_TRANSITIONS=703} [2022-12-13 12:34:32,053 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 385 predicate places. [2022-12-13 12:34:32,053 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 703 transitions, 15951 flow [2022-12-13 12:34:32,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:32,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:34:32,053 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:34:32,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 12:34:32,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 12:34:32,255 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:34:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:34:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1147622431, now seen corresponding path program 10 times [2022-12-13 12:34:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:34:32,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324387249] [2022-12-13 12:34:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:34:32,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:34:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:34:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:33,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:34:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324387249] [2022-12-13 12:34:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324387249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:34:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242752703] [2022-12-13 12:34:33,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:34:33,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:34:33,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:34:33,234 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:34:33,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 12:34:33,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:34:33,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:34:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 12:34:33,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:34:33,430 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 [2022-12-13 12:34:33,492 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 [2022-12-13 12:34:33,537 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 [2022-12-13 12:34:33,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 12:34:33,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:34:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:34:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:34:33,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:33,958 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 74 treesize of output 38 [2022-12-13 12:34:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:33,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:34:35,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:34:35,440 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 134 treesize of output 98 [2022-12-13 12:34:35,529 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-12-13 12:34:35,529 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 972 treesize of output 939 [2022-12-13 12:34:35,600 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-13 12:34:35,600 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 904 treesize of output 828 [2022-12-13 12:34:35,664 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-13 12:34:35,665 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 800 treesize of output 620 [2022-12-13 12:34:35,740 INFO L321 Elim1Store]: treesize reduction 24, result has 54.7 percent of original size [2022-12-13 12:34:35,740 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 461 treesize of output 437 [2022-12-13 12:34:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:34:36,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242752703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:34:36,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:34:36,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2022-12-13 12:34:36,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624119842] [2022-12-13 12:34:36,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:34:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 12:34:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:34:36,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 12:34:36,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1224, Unknown=4, NotChecked=0, Total=1482 [2022-12-13 12:34:38,375 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:34:38,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 703 transitions, 15951 flow. Second operand has 39 states, 39 states have (on average 88.76923076923077) internal successors, (3462), 39 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:34:38,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:34:38,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:34:38,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:34:48,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:34:51,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:34:53,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:34:58,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:35:00,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:35:09,482 INFO L130 PetriNetUnfolder]: 2980/5498 cut-off events. [2022-12-13 12:35:09,482 INFO L131 PetriNetUnfolder]: For 151165/151165 co-relation queries the response was YES. [2022-12-13 12:35:09,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51377 conditions, 5498 events. 2980/5498 cut-off events. For 151165/151165 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38855 event pairs, 410 based on Foata normal form. 14/5512 useless extension candidates. Maximal degree in co-relation 51225. Up to 1555 conditions per place. [2022-12-13 12:35:09,574 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 647 selfloop transitions, 449 changer transitions 59/1155 dead transitions. [2022-12-13 12:35:09,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1155 transitions, 25136 flow [2022-12-13 12:35:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 12:35:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-12-13 12:35:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5506 transitions. [2022-12-13 12:35:09,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3240348399246704 [2022-12-13 12:35:09,579 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5506 transitions. [2022-12-13 12:35:09,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5506 transitions. [2022-12-13 12:35:09,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:35:09,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5506 transitions. [2022-12-13 12:35:09,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 93.32203389830508) internal successors, (5506), 59 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:09,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 288.0) internal successors, (17280), 60 states have internal predecessors, (17280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:09,592 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 288.0) internal successors, (17280), 60 states have internal predecessors, (17280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:09,592 INFO L175 Difference]: Start difference. First operand has 414 places, 703 transitions, 15951 flow. Second operand 59 states and 5506 transitions. [2022-12-13 12:35:09,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1155 transitions, 25136 flow [2022-12-13 12:35:10,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1155 transitions, 24549 flow, removed 92 selfloop flow, removed 29 redundant places. [2022-12-13 12:35:10,503 INFO L231 Difference]: Finished difference. Result has 460 places, 835 transitions, 19902 flow [2022-12-13 12:35:10,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=15455, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=19902, PETRI_PLACES=460, PETRI_TRANSITIONS=835} [2022-12-13 12:35:10,504 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 431 predicate places. [2022-12-13 12:35:10,504 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 835 transitions, 19902 flow [2022-12-13 12:35:10,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 88.76923076923077) internal successors, (3462), 39 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:10,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:35:10,504 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:35:10,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 12:35:10,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:35:10,705 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:35:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:35:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1102109879, now seen corresponding path program 11 times [2022-12-13 12:35:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:35:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118247375] [2022-12-13 12:35:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:35:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:35:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:35:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:11,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:35:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118247375] [2022-12-13 12:35:11,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118247375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:35:11,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741390201] [2022-12-13 12:35:11,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:35:11,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:35:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:35:11,603 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:35:11,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 12:35:11,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:35:11,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:35:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:35:11,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:35:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:12,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:35:12,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:12,397 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 60 treesize of output 78 [2022-12-13 12:35:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741390201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:35:13,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:35:13,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-13 12:35:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107341845] [2022-12-13 12:35:13,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:35:13,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:35:13,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:35:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:35:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:35:14,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 288 [2022-12-13 12:35:14,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 835 transitions, 19902 flow. Second operand has 35 states, 35 states have (on average 112.97142857142858) internal successors, (3954), 35 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:14,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:35:14,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 288 [2022-12-13 12:35:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:35:17,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:35:19,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:35:22,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:35:27,709 INFO L130 PetriNetUnfolder]: 3325/5943 cut-off events. [2022-12-13 12:35:27,709 INFO L131 PetriNetUnfolder]: For 189385/189385 co-relation queries the response was YES. [2022-12-13 12:35:27,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59908 conditions, 5943 events. 3325/5943 cut-off events. For 189385/189385 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40412 event pairs, 544 based on Foata normal form. 4/5947 useless extension candidates. Maximal degree in co-relation 59736. Up to 1659 conditions per place. [2022-12-13 12:35:27,773 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 553 selfloop transitions, 562 changer transitions 34/1149 dead transitions. [2022-12-13 12:35:27,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1149 transitions, 27124 flow [2022-12-13 12:35:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 12:35:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 12:35:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3811 transitions. [2022-12-13 12:35:27,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4135199652777778 [2022-12-13 12:35:27,777 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3811 transitions. [2022-12-13 12:35:27,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3811 transitions. [2022-12-13 12:35:27,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:35:27,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3811 transitions. [2022-12-13 12:35:27,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 119.09375) internal successors, (3811), 32 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:27,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 288.0) internal successors, (9504), 33 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:27,783 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 288.0) internal successors, (9504), 33 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:27,783 INFO L175 Difference]: Start difference. First operand has 460 places, 835 transitions, 19902 flow. Second operand 32 states and 3811 transitions. [2022-12-13 12:35:27,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1149 transitions, 27124 flow [2022-12-13 12:35:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1149 transitions, 26122 flow, removed 353 selfloop flow, removed 22 redundant places. [2022-12-13 12:35:29,167 INFO L231 Difference]: Finished difference. Result has 476 places, 967 transitions, 23922 flow [2022-12-13 12:35:29,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=19053, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=23922, PETRI_PLACES=476, PETRI_TRANSITIONS=967} [2022-12-13 12:35:29,167 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 447 predicate places. [2022-12-13 12:35:29,167 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 967 transitions, 23922 flow [2022-12-13 12:35:29,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 112.97142857142858) internal successors, (3954), 35 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:29,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:35:29,168 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:35:29,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 12:35:29,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 12:35:29,369 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:35:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:35:29,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1796596779, now seen corresponding path program 12 times [2022-12-13 12:35:29,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:35:29,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396909745] [2022-12-13 12:35:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:35:29,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:35:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:35:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:30,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:35:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396909745] [2022-12-13 12:35:30,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396909745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:35:30,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508280792] [2022-12-13 12:35:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:35:30,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:35:30,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:35:30,326 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:35:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 12:35:30,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:35:30,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:35:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 12:35:30,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:35:30,521 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 [2022-12-13 12:35:30,565 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 [2022-12-13 12:35:30,609 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 [2022-12-13 12:35:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:35:30,797 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 24 [2022-12-13 12:35:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:31,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:35:32,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:32,484 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 131 treesize of output 95 [2022-12-13 12:35:32,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:32,553 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 4532 treesize of output 4150 [2022-12-13 12:35:32,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:32,604 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 4098 treesize of output 3572 [2022-12-13 12:35:32,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:32,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 3377 treesize of output 3099 [2022-12-13 12:35:32,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:35:32,786 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 3216 treesize of output 2608 [2022-12-13 12:35:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:35:34,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508280792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:35:34,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:35:34,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:35:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813274540] [2022-12-13 12:35:34,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:35:34,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:35:34,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:35:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:35:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1365, Unknown=14, NotChecked=0, Total=1560 [2022-12-13 12:35:37,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:35:37,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 967 transitions, 23922 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:35:37,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:35:37,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:35:37,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:35:46,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:36:00,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:36:09,619 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 165 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:36:14,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:36:14,619 INFO L130 PetriNetUnfolder]: 3432/6159 cut-off events. [2022-12-13 12:36:14,619 INFO L131 PetriNetUnfolder]: For 216112/216112 co-relation queries the response was YES. [2022-12-13 12:36:14,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62530 conditions, 6159 events. 3432/6159 cut-off events. For 216112/216112 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42949 event pairs, 628 based on Foata normal form. 3/6162 useless extension candidates. Maximal degree in co-relation 62353. Up to 3044 conditions per place. [2022-12-13 12:36:14,689 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 736 selfloop transitions, 484 changer transitions 30/1250 dead transitions. [2022-12-13 12:36:14,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1250 transitions, 30349 flow [2022-12-13 12:36:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 12:36:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-12-13 12:36:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4031 transitions. [2022-12-13 12:36:14,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.325500645994832 [2022-12-13 12:36:14,693 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4031 transitions. [2022-12-13 12:36:14,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4031 transitions. [2022-12-13 12:36:14,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:36:14,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4031 transitions. [2022-12-13 12:36:14,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 93.74418604651163) internal successors, (4031), 43 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:14,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 288.0) internal successors, (12672), 44 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:14,701 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 288.0) internal successors, (12672), 44 states have internal predecessors, (12672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:14,701 INFO L175 Difference]: Start difference. First operand has 476 places, 967 transitions, 23922 flow. Second operand 43 states and 4031 transitions. [2022-12-13 12:36:14,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1250 transitions, 30349 flow [2022-12-13 12:36:16,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1250 transitions, 29986 flow, removed 120 selfloop flow, removed 15 redundant places. [2022-12-13 12:36:16,305 INFO L231 Difference]: Finished difference. Result has 513 places, 997 transitions, 25444 flow [2022-12-13 12:36:16,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=23618, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=25444, PETRI_PLACES=513, PETRI_TRANSITIONS=997} [2022-12-13 12:36:16,306 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 484 predicate places. [2022-12-13 12:36:16,306 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 997 transitions, 25444 flow [2022-12-13 12:36:16,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:16,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:36:16,307 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:36:16,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 12:36:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 12:36:16,508 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:36:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:36:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -840648857, now seen corresponding path program 13 times [2022-12-13 12:36:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:36:16,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367151582] [2022-12-13 12:36:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:36:16,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:36:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:36:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:36:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:36:17,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367151582] [2022-12-13 12:36:17,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367151582] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:36:17,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824954475] [2022-12-13 12:36:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:36:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:36:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:36:17,453 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:36:17,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 12:36:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:36:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 12:36:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:36:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:36:17,953 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 23 treesize of output 25 [2022-12-13 12:36:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:36:18,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:36:18,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:36:18,704 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 116 treesize of output 134 [2022-12-13 12:36:18,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:36:18,733 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 62 treesize of output 68 [2022-12-13 12:36:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:36:19,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824954475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:36:19,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:36:19,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-13 12:36:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430437850] [2022-12-13 12:36:19,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:36:19,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 12:36:19,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:36:19,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 12:36:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1230, Unknown=1, NotChecked=0, Total=1406 [2022-12-13 12:36:20,551 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 288 [2022-12-13 12:36:20,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 997 transitions, 25444 flow. Second operand has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:36:20,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:36:20,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 288 [2022-12-13 12:36:20,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:36:34,511 WARN L233 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 108 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:36:50,596 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 110 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:36:59,885 WARN L233 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 113 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:37:13,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:37:16,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:37:22,245 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:37:33,073 WARN L233 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 112 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:37:36,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:37:42,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:37:44,327 INFO L130 PetriNetUnfolder]: 3481/6267 cut-off events. [2022-12-13 12:37:44,327 INFO L131 PetriNetUnfolder]: For 223784/223784 co-relation queries the response was YES. [2022-12-13 12:37:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64921 conditions, 6267 events. 3481/6267 cut-off events. For 223784/223784 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43793 event pairs, 677 based on Foata normal form. 4/6271 useless extension candidates. Maximal degree in co-relation 64736. Up to 1831 conditions per place. [2022-12-13 12:37:44,399 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 644 selfloop transitions, 528 changer transitions 45/1217 dead transitions. [2022-12-13 12:37:44,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 1217 transitions, 29900 flow [2022-12-13 12:37:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 12:37:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 12:37:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3822 transitions. [2022-12-13 12:37:44,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34923245614035087 [2022-12-13 12:37:44,402 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3822 transitions. [2022-12-13 12:37:44,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3822 transitions. [2022-12-13 12:37:44,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:37:44,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3822 transitions. [2022-12-13 12:37:44,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 100.57894736842105) internal successors, (3822), 38 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:44,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 288.0) internal successors, (11232), 39 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:44,410 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 288.0) internal successors, (11232), 39 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:44,410 INFO L175 Difference]: Start difference. First operand has 513 places, 997 transitions, 25444 flow. Second operand 38 states and 3822 transitions. [2022-12-13 12:37:44,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 1217 transitions, 29900 flow [2022-12-13 12:37:46,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1217 transitions, 29303 flow, removed 61 selfloop flow, removed 21 redundant places. [2022-12-13 12:37:46,096 INFO L231 Difference]: Finished difference. Result has 538 places, 1016 transitions, 26577 flow [2022-12-13 12:37:46,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=24888, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=26577, PETRI_PLACES=538, PETRI_TRANSITIONS=1016} [2022-12-13 12:37:46,097 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 509 predicate places. [2022-12-13 12:37:46,097 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1016 transitions, 26577 flow [2022-12-13 12:37:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.8157894736842) internal successors, (3603), 38 states have internal predecessors, (3603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:46,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:37:46,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:37:46,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 12:37:46,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 12:37:46,298 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:37:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:37:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1262270151, now seen corresponding path program 14 times [2022-12-13 12:37:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:37:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145245821] [2022-12-13 12:37:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:37:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:37:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:37:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:37:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145245821] [2022-12-13 12:37:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145245821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:37:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896981733] [2022-12-13 12:37:47,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:37:47,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:37:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:37:47,127 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:37:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 12:37:47,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:37:47,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:37:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 12:37:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:37:47,352 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 [2022-12-13 12:37:47,396 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 [2022-12-13 12:37:47,431 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 [2022-12-13 12:37:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:37:47,753 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 31 treesize of output 31 [2022-12-13 12:37:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:47,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:37:49,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:37:49,310 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2022-12-13 12:37:49,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:37:49,356 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 352 treesize of output 370 [2022-12-13 12:37:49,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 165 [2022-12-13 12:37:49,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:37:49,417 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 266 treesize of output 266 [2022-12-13 12:37:49,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:37:49,489 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 151 treesize of output 177 [2022-12-13 12:37:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:37:51,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896981733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:37:51,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:37:51,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:37:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851134399] [2022-12-13 12:37:51,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:37:51,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:37:51,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:37:51,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:37:51,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1371, Unknown=4, NotChecked=0, Total=1560 [2022-12-13 12:37:54,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:37:54,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1016 transitions, 26577 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:37:54,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:37:54,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:37:54,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:08,043 INFO L130 PetriNetUnfolder]: 3476/6277 cut-off events. [2022-12-13 12:38:08,044 INFO L131 PetriNetUnfolder]: For 250598/250598 co-relation queries the response was YES. [2022-12-13 12:38:08,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65946 conditions, 6277 events. 3476/6277 cut-off events. For 250598/250598 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44208 event pairs, 656 based on Foata normal form. 3/6280 useless extension candidates. Maximal degree in co-relation 65753. Up to 2678 conditions per place. [2022-12-13 12:38:08,124 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 681 selfloop transitions, 555 changer transitions 46/1282 dead transitions. [2022-12-13 12:38:08,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 1282 transitions, 32750 flow [2022-12-13 12:38:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 12:38:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-13 12:38:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3936 transitions. [2022-12-13 12:38:08,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3253968253968254 [2022-12-13 12:38:08,127 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3936 transitions. [2022-12-13 12:38:08,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3936 transitions. [2022-12-13 12:38:08,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:38:08,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3936 transitions. [2022-12-13 12:38:08,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 93.71428571428571) internal successors, (3936), 42 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:08,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 288.0) internal successors, (12384), 43 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:08,203 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 288.0) internal successors, (12384), 43 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:08,203 INFO L175 Difference]: Start difference. First operand has 538 places, 1016 transitions, 26577 flow. Second operand 42 states and 3936 transitions. [2022-12-13 12:38:08,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 1282 transitions, 32750 flow [2022-12-13 12:38:09,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1282 transitions, 32152 flow, removed 77 selfloop flow, removed 24 redundant places. [2022-12-13 12:38:09,894 INFO L231 Difference]: Finished difference. Result has 560 places, 1030 transitions, 27717 flow [2022-12-13 12:38:09,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=26059, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=27717, PETRI_PLACES=560, PETRI_TRANSITIONS=1030} [2022-12-13 12:38:09,895 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 531 predicate places. [2022-12-13 12:38:09,895 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 1030 transitions, 27717 flow [2022-12-13 12:38:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:09,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:38:09,895 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:38:09,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 12:38:10,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:38:10,096 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:38:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:38:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash 780187195, now seen corresponding path program 15 times [2022-12-13 12:38:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:38:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419315738] [2022-12-13 12:38:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:38:10,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:38:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:38:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:11,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:38:11,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419315738] [2022-12-13 12:38:11,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419315738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:38:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959621304] [2022-12-13 12:38:11,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:38:11,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:38:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:38:11,462 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:38:11,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f0824ff-3f4f-43c8-8b2e-9108d539b804/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 12:38:11,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 12:38:11,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:38:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 12:38:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:38:11,709 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 [2022-12-13 12:38:11,753 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 [2022-12-13 12:38:11,787 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 [2022-12-13 12:38:11,820 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 [2022-12-13 12:38:12,135 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-12-13 12:38:12,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 85 treesize of output 35 [2022-12-13 12:38:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:12,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:38:13,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:38:13,785 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 133 treesize of output 97 [2022-12-13 12:38:13,863 INFO L321 Elim1Store]: treesize reduction 31, result has 52.3 percent of original size [2022-12-13 12:38:13,863 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 468 treesize of output 468 [2022-12-13 12:38:13,918 INFO L321 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2022-12-13 12:38:13,919 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 435 treesize of output 361 [2022-12-13 12:38:13,976 INFO L321 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2022-12-13 12:38:13,976 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 335 treesize of output 311 [2022-12-13 12:38:14,044 INFO L321 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2022-12-13 12:38:14,044 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 222 treesize of output 223 [2022-12-13 12:38:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:38:14,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959621304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:38:14,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:38:14,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2022-12-13 12:38:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141586291] [2022-12-13 12:38:14,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:38:14,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:38:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:38:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:38:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1317, Unknown=8, NotChecked=0, Total=1560 [2022-12-13 12:38:16,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:19,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:21,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:23,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:26,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:27,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 288 [2022-12-13 12:38:27,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 1030 transitions, 27717 flow. Second operand has 40 states, 40 states have (on average 88.725) internal successors, (3549), 40 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:38:27,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:38:27,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 288 [2022-12-13 12:38:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:38:36,480 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 93 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:38:43,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:38:48,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]