/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:20:34,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:20:34,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:20:34,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:20:34,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:20:34,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:20:34,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:20:34,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:20:34,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:20:34,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:20:34,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:20:34,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:20:34,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:20:34,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:20:34,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:20:34,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:20:34,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:20:34,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:20:34,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:20:34,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:20:34,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:20:34,686 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:20:34,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:20:34,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:20:34,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:20:34,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:20:34,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:20:34,691 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:20:34,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:20:34,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:20:34,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:20:34,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:20:34,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:20:34,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:20:34,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:20:34,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:20:34,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:20:34,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:20:34,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:20:34,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:20:34,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:20:34,699 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2022-12-05 21:20:34,739 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:20:34,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:20:34,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:20:34,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:20:34,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:20:34,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:20:34,741 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:20:34,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:20:34,742 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:20:34,742 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:20:34,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:20:34,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:20:34,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:20:34,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:20:34,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:20:34,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:20:34,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:20:35,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:20:35,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:20:35,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:20:35,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:20:35,075 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:20:35,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2022-12-05 21:20:36,086 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:20:36,279 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:20:36,279 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2022-12-05 21:20:36,283 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8b9e130/2a3e6cad43d0482ea602de89310392d9/FLAGcb3851a5f [2022-12-05 21:20:36,292 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d8b9e130/2a3e6cad43d0482ea602de89310392d9 [2022-12-05 21:20:36,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:20:36,294 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:20:36,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:20:36,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:20:36,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:20:36,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2824df32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36, skipping insertion in model container [2022-12-05 21:20:36,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:20:36,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:20:36,410 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,414 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,415 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,416 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,418 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,419 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,420 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,421 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,429 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,431 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,432 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,440 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-05 21:20:36,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:20:36,452 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:20:36,472 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,474 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,474 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,475 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,476 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,477 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,477 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,478 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,480 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 21:20:36,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 21:20:36,507 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-05 21:20:36,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:20:36,520 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:20:36,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36 WrapperNode [2022-12-05 21:20:36,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:20:36,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:20:36,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:20:36,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:20:36,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,552 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2022-12-05 21:20:36,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:20:36,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:20:36,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:20:36,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:20:36,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,571 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:20:36,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:20:36,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:20:36,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:20:36,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (1/1) ... [2022-12-05 21:20:36,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:20:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:36,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-05 21:20:36,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-05 21:20:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:20:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:20:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:20:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:20:36,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:20:36,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:20:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:20:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-05 21:20:36,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:20:36,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:20:36,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:20:36,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:20:36,673 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:20:36,770 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:20:36,772 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:20:37,140 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:20:37,271 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:20:37,271 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-05 21:20:37,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:20:37 BoogieIcfgContainer [2022-12-05 21:20:37,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:20:37,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:20:37,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:20:37,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:20:37,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:20:36" (1/3) ... [2022-12-05 21:20:37,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9a1b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:20:37, skipping insertion in model container [2022-12-05 21:20:37,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:36" (2/3) ... [2022-12-05 21:20:37,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9a1b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:20:37, skipping insertion in model container [2022-12-05 21:20:37,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:20:37" (3/3) ... [2022-12-05 21:20:37,277 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-12-05 21:20:37,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:20:37,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:20:37,289 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:20:37,354 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-05 21:20:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 192 transitions, 416 flow [2022-12-05 21:20:37,449 INFO L130 PetriNetUnfolder]: 15/188 cut-off events. [2022-12-05 21:20:37,449 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:20:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 188 events. 15/188 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-12-05 21:20:37,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 192 transitions, 416 flow [2022-12-05 21:20:37,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 176 transitions, 376 flow [2022-12-05 21:20:37,464 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:20:37,490 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 176 transitions, 376 flow [2022-12-05 21:20:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 176 transitions, 376 flow [2022-12-05 21:20:37,530 INFO L130 PetriNetUnfolder]: 15/176 cut-off events. [2022-12-05 21:20:37,530 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:20:37,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 176 events. 15/176 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 150. Up to 2 conditions per place. [2022-12-05 21:20:37,532 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 176 transitions, 376 flow [2022-12-05 21:20:37,533 INFO L188 LiptonReduction]: Number of co-enabled transitions 2160 [2022-12-05 21:20:44,975 INFO L203 LiptonReduction]: Total number of compositions: 145 [2022-12-05 21:20:44,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:20:44,988 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=false, 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;@1ee09816, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:20:44,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-05 21:20:44,993 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2022-12-05 21:20:44,993 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-05 21:20:44,993 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:44,994 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:44,994 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 2 more)] === [2022-12-05 21:20:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 557514244, now seen corresponding path program 1 times [2022-12-05 21:20:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:45,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412299667] [2022-12-05 21:20:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:45,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:45,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412299667] [2022-12-05 21:20:45,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412299667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:20:45,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:20:45,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 21:20:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240617562] [2022-12-05 21:20:45,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:20:45,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:20:45,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:20:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:20:45,402 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:45,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:45,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:45,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:45,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:45,658 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2022-12-05 21:20:45,659 INFO L131 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2022-12-05 21:20:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9168 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2022-12-05 21:20:45,685 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2022-12-05 21:20:45,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2022-12-05 21:20:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:20:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:20:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2022-12-05 21:20:45,693 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6236559139784946 [2022-12-05 21:20:45,694 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 58 transitions. [2022-12-05 21:20:45,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2022-12-05 21:20:45,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-05 21:20:45,700 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2022-12-05 21:20:45,701 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2022-12-05 21:20:45,703 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-12-05 21:20:45,703 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2022-12-05 21:20:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:45,703 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:45,703 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:45,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:20:45,704 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 2 more)] === [2022-12-05 21:20:45,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash 670638725, now seen corresponding path program 1 times [2022-12-05 21:20:45,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:45,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356050863] [2022-12-05 21:20:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:45,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:45,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:45,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356050863] [2022-12-05 21:20:45,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356050863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:20:45,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:20:45,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:20:45,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142185106] [2022-12-05 21:20:45,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:20:45,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:20:45,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:20:45,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:20:45,929 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:45,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:45,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:45,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:45,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:46,347 INFO L130 PetriNetUnfolder]: 4054/5355 cut-off events. [2022-12-05 21:20:46,347 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-05 21:20:46,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 5355 events. 4054/5355 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21790 event pairs, 810 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 2468. Up to 2128 conditions per place. [2022-12-05 21:20:46,404 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 83 selfloop transitions, 8 changer transitions 1/92 dead transitions. [2022-12-05 21:20:46,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 92 transitions, 455 flow [2022-12-05 21:20:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:20:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:20:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2022-12-05 21:20:46,406 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2022-12-05 21:20:46,406 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 81 transitions. [2022-12-05 21:20:46,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 92 transitions, 455 flow [2022-12-05 21:20:46,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:20:46,408 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 158 flow [2022-12-05 21:20:46,408 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2022-12-05 21:20:46,409 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-12-05 21:20:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 158 flow [2022-12-05 21:20:46,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:46,409 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:46,409 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:46,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:20:46,409 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 2 more)] === [2022-12-05 21:20:46,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:46,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1224213684, now seen corresponding path program 1 times [2022-12-05 21:20:46,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:46,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640138183] [2022-12-05 21:20:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:46,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:46,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:46,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640138183] [2022-12-05 21:20:46,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640138183] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:20:46,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:20:46,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:20:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292456475] [2022-12-05 21:20:46,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:20:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:20:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:20:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:20:46,598 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:46,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 158 flow. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:46,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:46,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:46,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:47,218 INFO L130 PetriNetUnfolder]: 5996/7909 cut-off events. [2022-12-05 21:20:47,219 INFO L131 PetriNetUnfolder]: For 3195/3195 co-relation queries the response was YES. [2022-12-05 21:20:47,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21181 conditions, 7909 events. 5996/7909 cut-off events. For 3195/3195 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33744 event pairs, 1001 based on Foata normal form. 1/7910 useless extension candidates. Maximal degree in co-relation 9255. Up to 4733 conditions per place. [2022-12-05 21:20:47,248 INFO L137 encePairwiseOnDemand]: 25/31 looper letters, 85 selfloop transitions, 13 changer transitions 5/103 dead transitions. [2022-12-05 21:20:47,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 103 transitions, 568 flow [2022-12-05 21:20:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:20:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:20:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2022-12-05 21:20:47,251 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6532258064516129 [2022-12-05 21:20:47,251 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 158 flow. Second operand 4 states and 81 transitions. [2022-12-05 21:20:47,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 103 transitions, 568 flow [2022-12-05 21:20:47,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 103 transitions, 568 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-05 21:20:47,263 INFO L231 Difference]: Finished difference. Result has 45 places, 53 transitions, 286 flow [2022-12-05 21:20:47,263 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=45, PETRI_TRANSITIONS=53} [2022-12-05 21:20:47,264 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2022-12-05 21:20:47,264 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 53 transitions, 286 flow [2022-12-05 21:20:47,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:47,265 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:47,265 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:47,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:20:47,265 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 2 more)] === [2022-12-05 21:20:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash 354844287, now seen corresponding path program 1 times [2022-12-05 21:20:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:47,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860524694] [2022-12-05 21:20:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:47,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860524694] [2022-12-05 21:20:47,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860524694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:20:47,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:20:47,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:20:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830844393] [2022-12-05 21:20:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:20:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:20:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:47,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:20:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:20:47,465 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:47,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 53 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:47,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:47,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:47,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:48,236 INFO L130 PetriNetUnfolder]: 6727/8968 cut-off events. [2022-12-05 21:20:48,236 INFO L131 PetriNetUnfolder]: For 11882/11882 co-relation queries the response was YES. [2022-12-05 21:20:48,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26654 conditions, 8968 events. 6727/8968 cut-off events. For 11882/11882 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 38681 event pairs, 3894 based on Foata normal form. 238/9206 useless extension candidates. Maximal degree in co-relation 14094. Up to 7910 conditions per place. [2022-12-05 21:20:48,270 INFO L137 encePairwiseOnDemand]: 26/31 looper letters, 52 selfloop transitions, 2 changer transitions 28/82 dead transitions. [2022-12-05 21:20:48,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 82 transitions, 558 flow [2022-12-05 21:20:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:20:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:20:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 58 transitions. [2022-12-05 21:20:48,271 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2022-12-05 21:20:48,271 INFO L175 Difference]: Start difference. First operand has 45 places, 53 transitions, 286 flow. Second operand 4 states and 58 transitions. [2022-12-05 21:20:48,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 82 transitions, 558 flow [2022-12-05 21:20:48,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 554 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-05 21:20:48,304 INFO L231 Difference]: Finished difference. Result has 50 places, 54 transitions, 302 flow [2022-12-05 21:20:48,304 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=302, PETRI_PLACES=50, PETRI_TRANSITIONS=54} [2022-12-05 21:20:48,305 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2022-12-05 21:20:48,305 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 54 transitions, 302 flow [2022-12-05 21:20:48,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:48,305 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:48,305 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:48,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:20:48,305 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 2 more)] === [2022-12-05 21:20:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1224763198, now seen corresponding path program 1 times [2022-12-05 21:20:48,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:48,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081944153] [2022-12-05 21:20:48,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:48,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:48,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081944153] [2022-12-05 21:20:48,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081944153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:48,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104928634] [2022-12-05 21:20:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:48,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:48,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:48,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:20:48,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:20:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:48,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-05 21:20:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:48,782 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-05 21:20:48,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-05 21:20:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:48,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:48,980 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-05 21:20:48,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-05 21:20:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:20:49,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104928634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:49,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:49,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 15 [2022-12-05 21:20:49,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625499117] [2022-12-05 21:20:49,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:49,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:20:49,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:20:49,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:20:49,006 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:49,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 54 transitions, 302 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:49,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:49,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:49,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:50,890 INFO L130 PetriNetUnfolder]: 11797/15624 cut-off events. [2022-12-05 21:20:50,890 INFO L131 PetriNetUnfolder]: For 17587/17587 co-relation queries the response was YES. [2022-12-05 21:20:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46521 conditions, 15624 events. 11797/15624 cut-off events. For 17587/17587 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 73019 event pairs, 589 based on Foata normal form. 136/15760 useless extension candidates. Maximal degree in co-relation 46502. Up to 9721 conditions per place. [2022-12-05 21:20:50,952 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 161 selfloop transitions, 120 changer transitions 38/319 dead transitions. [2022-12-05 21:20:50,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 319 transitions, 1951 flow [2022-12-05 21:20:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:20:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 21:20:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 262 transitions. [2022-12-05 21:20:50,953 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46953405017921146 [2022-12-05 21:20:50,953 INFO L175 Difference]: Start difference. First operand has 50 places, 54 transitions, 302 flow. Second operand 18 states and 262 transitions. [2022-12-05 21:20:50,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 319 transitions, 1951 flow [2022-12-05 21:20:50,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 319 transitions, 1923 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-05 21:20:50,990 INFO L231 Difference]: Finished difference. Result has 68 places, 168 transitions, 1290 flow [2022-12-05 21:20:50,990 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1290, PETRI_PLACES=68, PETRI_TRANSITIONS=168} [2022-12-05 21:20:50,990 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2022-12-05 21:20:50,991 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 168 transitions, 1290 flow [2022-12-05 21:20:50,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:50,991 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:50,991 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:20:50,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:20:51,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:51,196 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 2 more)] === [2022-12-05 21:20:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2040856933, now seen corresponding path program 1 times [2022-12-05 21:20:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:51,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815372270] [2022-12-05 21:20:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:52,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815372270] [2022-12-05 21:20:52,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815372270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406256953] [2022-12-05 21:20:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:52,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:52,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:52,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:20:52,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:20:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:20:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:20:52,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:20:52,353 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 19 treesize of output 10 [2022-12-05 21:20:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:52,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:20:52,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406256953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:52,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:52,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2022-12-05 21:20:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007094576] [2022-12-05 21:20:52,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:52,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:20:52,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:20:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:20:52,609 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:20:52,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 168 transitions, 1290 flow. Second operand has 21 states, 20 states have (on average 4.15) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:52,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:52,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:20:52,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:58,946 INFO L130 PetriNetUnfolder]: 32612/43049 cut-off events. [2022-12-05 21:20:58,947 INFO L131 PetriNetUnfolder]: For 71259/71259 co-relation queries the response was YES. [2022-12-05 21:20:59,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154605 conditions, 43049 events. 32612/43049 cut-off events. For 71259/71259 co-relation queries the response was YES. Maximal size of possible extension queue 1478. Compared 229064 event pairs, 2098 based on Foata normal form. 40/43089 useless extension candidates. Maximal degree in co-relation 96792. Up to 19037 conditions per place. [2022-12-05 21:20:59,394 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 691 selfloop transitions, 475 changer transitions 71/1237 dead transitions. [2022-12-05 21:20:59,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 1237 transitions, 9480 flow [2022-12-05 21:20:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-05 21:20:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-12-05 21:20:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 856 transitions. [2022-12-05 21:20:59,403 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4844368986983588 [2022-12-05 21:20:59,403 INFO L175 Difference]: Start difference. First operand has 68 places, 168 transitions, 1290 flow. Second operand 57 states and 856 transitions. [2022-12-05 21:20:59,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 1237 transitions, 9480 flow [2022-12-05 21:20:59,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 1237 transitions, 9301 flow, removed 88 selfloop flow, removed 2 redundant places. [2022-12-05 21:20:59,518 INFO L231 Difference]: Finished difference. Result has 138 places, 654 transitions, 6548 flow [2022-12-05 21:20:59,519 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=6548, PETRI_PLACES=138, PETRI_TRANSITIONS=654} [2022-12-05 21:20:59,520 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 99 predicate places. [2022-12-05 21:20:59,520 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 654 transitions, 6548 flow [2022-12-05 21:20:59,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.15) internal successors, (83), 21 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:59,520 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:59,521 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:20:59,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:20:59,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-05 21:20:59,726 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 2 more)] === [2022-12-05 21:20:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1653639817, now seen corresponding path program 2 times [2022-12-05 21:20:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504880006] [2022-12-05 21:20:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:21:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:21:00,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:21:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504880006] [2022-12-05 21:21:00,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504880006] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:21:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402701445] [2022-12-05 21:21:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:21:00,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:00,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:21:00,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:21:00,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:21:00,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:21:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:21:00,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:21:00,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:21:00,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:21:00,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:21:00,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2022-12-05 21:21:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:21:00,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:21:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:21:00,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402701445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:21:00,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:21:00,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2022-12-05 21:21:00,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472592023] [2022-12-05 21:21:00,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:21:00,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:21:00,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:21:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:21:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:21:00,477 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:21:00,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 654 transitions, 6548 flow. Second operand has 16 states, 15 states have (on average 4.733333333333333) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:21:00,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:21:00,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:21:00,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:21:08,702 INFO L130 PetriNetUnfolder]: 46313/61069 cut-off events. [2022-12-05 21:21:08,702 INFO L131 PetriNetUnfolder]: For 158430/158430 co-relation queries the response was YES. [2022-12-05 21:21:09,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248694 conditions, 61069 events. 46313/61069 cut-off events. For 158430/158430 co-relation queries the response was YES. Maximal size of possible extension queue 1966. Compared 335820 event pairs, 3040 based on Foata normal form. 8/61077 useless extension candidates. Maximal degree in co-relation 242194. Up to 42814 conditions per place. [2022-12-05 21:21:09,219 INFO L137 encePairwiseOnDemand]: 16/31 looper letters, 613 selfloop transitions, 716 changer transitions 42/1371 dead transitions. [2022-12-05 21:21:09,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 1371 transitions, 14849 flow [2022-12-05 21:21:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:21:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:21:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 406 transitions. [2022-12-05 21:21:09,222 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4850657108721625 [2022-12-05 21:21:09,223 INFO L175 Difference]: Start difference. First operand has 138 places, 654 transitions, 6548 flow. Second operand 27 states and 406 transitions. [2022-12-05 21:21:09,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 1371 transitions, 14849 flow [2022-12-05 21:21:10,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 1371 transitions, 13600 flow, removed 617 selfloop flow, removed 4 redundant places. [2022-12-05 21:21:10,506 INFO L231 Difference]: Finished difference. Result has 176 places, 1123 transitions, 13112 flow [2022-12-05 21:21:10,507 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5705, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13112, PETRI_PLACES=176, PETRI_TRANSITIONS=1123} [2022-12-05 21:21:10,507 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 137 predicate places. [2022-12-05 21:21:10,507 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 1123 transitions, 13112 flow [2022-12-05 21:21:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.733333333333333) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:21:10,507 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:21:10,507 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:21:10,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:21:10,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:10,713 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 2 more)] === [2022-12-05 21:21:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:21:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1452875923, now seen corresponding path program 3 times [2022-12-05 21:21:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:21:10,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378473654] [2022-12-05 21:21:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:21:10,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:21:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:21:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:21:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:21:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378473654] [2022-12-05 21:21:11,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378473654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:21:11,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988723719] [2022-12-05 21:21:11,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:21:11,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:11,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:21:11,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:21:11,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:21:11,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:21:11,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:21:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:21:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:21:11,704 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-05 21:21:11,704 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 27 treesize of output 14 [2022-12-05 21:21:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:21:11,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:21:11,878 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-05 21:21:11,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-05 21:21:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:21:11,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988723719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:21:11,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:21:11,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2022-12-05 21:21:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583178388] [2022-12-05 21:21:11,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:21:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:21:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:21:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:21:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:21:11,909 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:21:11,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 1123 transitions, 13112 flow. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:21:11,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:21:11,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:21:11,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:21:27,552 INFO L130 PetriNetUnfolder]: 62409/82333 cut-off events. [2022-12-05 21:21:27,567 INFO L131 PetriNetUnfolder]: For 314146/314146 co-relation queries the response was YES. [2022-12-05 21:21:28,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373772 conditions, 82333 events. 62409/82333 cut-off events. For 314146/314146 co-relation queries the response was YES. Maximal size of possible extension queue 2639. Compared 470055 event pairs, 4846 based on Foata normal form. 24/82357 useless extension candidates. Maximal degree in co-relation 373707. Up to 31911 conditions per place. [2022-12-05 21:21:28,386 INFO L137 encePairwiseOnDemand]: 17/31 looper letters, 1488 selfloop transitions, 871 changer transitions 40/2399 dead transitions. [2022-12-05 21:21:28,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 2399 transitions, 28262 flow [2022-12-05 21:21:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-05 21:21:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-12-05 21:21:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 931 transitions. [2022-12-05 21:21:28,394 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5362903225806451 [2022-12-05 21:21:28,394 INFO L175 Difference]: Start difference. First operand has 176 places, 1123 transitions, 13112 flow. Second operand 56 states and 931 transitions. [2022-12-05 21:21:28,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 2399 transitions, 28262 flow [2022-12-05 21:21:43,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 2399 transitions, 26908 flow, removed 666 selfloop flow, removed 4 redundant places. [2022-12-05 21:21:43,487 INFO L231 Difference]: Finished difference. Result has 263 places, 1776 transitions, 23892 flow [2022-12-05 21:21:43,488 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=12190, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=23892, PETRI_PLACES=263, PETRI_TRANSITIONS=1776} [2022-12-05 21:21:43,489 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 224 predicate places. [2022-12-05 21:21:43,489 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 1776 transitions, 23892 flow [2022-12-05 21:21:43,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:21:43,489 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:21:43,489 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:21:43,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 21:21:43,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:43,692 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 2 more)] === [2022-12-05 21:21:43,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:21:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash -327402071, now seen corresponding path program 1 times [2022-12-05 21:21:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:21:43,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687213766] [2022-12-05 21:21:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:21:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:21:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:21:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:21:44,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:21:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687213766] [2022-12-05 21:21:44,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687213766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:21:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149358962] [2022-12-05 21:21:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:21:44,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:21:44,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:21:44,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:21:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:21:44,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:21:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:21:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:21:44,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:21:44,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-05 21:21:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:21:44,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:21:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-05 21:21:45,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149358962] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:21:45,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:21:45,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 23 [2022-12-05 21:21:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285127186] [2022-12-05 21:21:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:21:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:21:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:21:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:21:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:21:45,020 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:21:45,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 1776 transitions, 23892 flow. Second operand has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:21:45,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:21:45,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:21:45,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:22:12,119 INFO L130 PetriNetUnfolder]: 77201/101832 cut-off events. [2022-12-05 21:22:12,119 INFO L131 PetriNetUnfolder]: For 676938/676938 co-relation queries the response was YES. [2022-12-05 21:22:13,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516216 conditions, 101832 events. 77201/101832 cut-off events. For 676938/676938 co-relation queries the response was YES. Maximal size of possible extension queue 3373. Compared 599909 event pairs, 7113 based on Foata normal form. 8/101840 useless extension candidates. Maximal degree in co-relation 516113. Up to 79766 conditions per place. [2022-12-05 21:22:14,160 INFO L137 encePairwiseOnDemand]: 17/31 looper letters, 1482 selfloop transitions, 963 changer transitions 9/2454 dead transitions. [2022-12-05 21:22:14,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 2454 transitions, 36007 flow [2022-12-05 21:22:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-05 21:22:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-05 21:22:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 451 transitions. [2022-12-05 21:22:14,162 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5016685205784205 [2022-12-05 21:22:14,162 INFO L175 Difference]: Start difference. First operand has 263 places, 1776 transitions, 23892 flow. Second operand 29 states and 451 transitions. [2022-12-05 21:22:14,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 2454 transitions, 36007 flow [2022-12-05 21:22:41,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 2454 transitions, 34315 flow, removed 834 selfloop flow, removed 5 redundant places. [2022-12-05 21:22:41,482 INFO L231 Difference]: Finished difference. Result has 301 places, 2196 transitions, 31761 flow [2022-12-05 21:22:41,483 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=22438, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=624, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=31761, PETRI_PLACES=301, PETRI_TRANSITIONS=2196} [2022-12-05 21:22:41,484 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 262 predicate places. [2022-12-05 21:22:41,484 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 2196 transitions, 31761 flow [2022-12-05 21:22:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.608695652173913) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:22:41,484 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:22:41,484 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:22:41,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 21:22:41,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:22:41,690 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 2 more)] === [2022-12-05 21:22:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:22:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1558687801, now seen corresponding path program 4 times [2022-12-05 21:22:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:22:41,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836783136] [2022-12-05 21:22:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:22:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:22:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:22:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:22:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:22:42,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836783136] [2022-12-05 21:22:42,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836783136] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:22:42,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818637866] [2022-12-05 21:22:42,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:22:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:22:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:22:42,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:22:42,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:22:42,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:22:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:22:42,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-05 21:22:42,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:22:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:22:42,383 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 [2022-12-05 21:22:42,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:22:42,420 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 25 treesize of output 21 [2022-12-05 21:22:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:22:42,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:22:42,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-05 21:22:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:22:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818637866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:22:42,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:22:42,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-12-05 21:22:42,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792101952] [2022-12-05 21:22:42,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:22:42,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:22:42,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:22:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:22:42,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=537, Unknown=5, NotChecked=0, Total=650 [2022-12-05 21:22:42,835 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:22:42,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 2196 transitions, 31761 flow. Second operand has 26 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:22:42,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:22:42,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:22:42,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:23:16,230 INFO L130 PetriNetUnfolder]: 83711/110371 cut-off events. [2022-12-05 21:23:16,230 INFO L131 PetriNetUnfolder]: For 949571/949571 co-relation queries the response was YES. [2022-12-05 21:23:17,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601002 conditions, 110371 events. 83711/110371 cut-off events. For 949571/949571 co-relation queries the response was YES. Maximal size of possible extension queue 3560. Compared 653692 event pairs, 8664 based on Foata normal form. 2/110373 useless extension candidates. Maximal degree in co-relation 600883. Up to 96202 conditions per place. [2022-12-05 21:23:18,423 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 1790 selfloop transitions, 955 changer transitions 21/2766 dead transitions. [2022-12-05 21:23:18,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 2766 transitions, 44188 flow [2022-12-05 21:23:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:23:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:23:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 320 transitions. [2022-12-05 21:23:18,425 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4915514592933948 [2022-12-05 21:23:18,425 INFO L175 Difference]: Start difference. First operand has 301 places, 2196 transitions, 31761 flow. Second operand 21 states and 320 transitions. [2022-12-05 21:23:18,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 2766 transitions, 44188 flow [2022-12-05 21:23:56,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 2766 transitions, 42486 flow, removed 820 selfloop flow, removed 7 redundant places. [2022-12-05 21:23:56,452 INFO L231 Difference]: Finished difference. Result has 324 places, 2545 transitions, 38812 flow [2022-12-05 21:23:56,453 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=30241, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=38812, PETRI_PLACES=324, PETRI_TRANSITIONS=2545} [2022-12-05 21:23:56,454 INFO L294 CegarLoopForPetriNet]: 39 programPoint places, 285 predicate places. [2022-12-05 21:23:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 2545 transitions, 38812 flow [2022-12-05 21:23:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:23:56,454 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:23:56,454 INFO L213 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, 1, 1, 1, 1, 1] [2022-12-05 21:23:56,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:23:56,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:23:56,659 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 2 more)] === [2022-12-05 21:23:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:23:56,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1972375921, now seen corresponding path program 5 times [2022-12-05 21:23:56,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:23:56,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348595887] [2022-12-05 21:23:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:23:56,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:23:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:23:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:23:57,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:23:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348595887] [2022-12-05 21:23:57,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348595887] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:23:57,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24251849] [2022-12-05 21:23:57,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:23:57,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:23:57,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:23:57,085 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:23:57,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:23:57,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:23:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:23:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-05 21:23:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:23:57,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:23:57,309 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 19 treesize of output 19 [2022-12-05 21:23:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:23:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:23:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-05 21:23:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24251849] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:23:57,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:23:57,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2022-12-05 21:23:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39664485] [2022-12-05 21:23:57,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:23:57,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:23:57,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:23:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:23:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:23:57,481 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-05 21:23:57,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 2545 transitions, 38812 flow. Second operand has 18 states, 17 states have (on average 4.764705882352941) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:23:57,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:23:57,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-05 21:23:57,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand