./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:58:58,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:58:58,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:58:58,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:58:58,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:58:58,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:58:58,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:58:58,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:58:58,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:58:58,838 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:58:58,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:58:58,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:58:58,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:58:58,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:58:58,840 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:58:58,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:58:58,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:58:58,841 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:58:58,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:58:58,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:58:58,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:58:58,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:58:58,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:58:58,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:58:58,843 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:58:58,843 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:58:58,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:58:58,843 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:58:58,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:58:58,844 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:58:58,844 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:58:58,845 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:58:58,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:58:58,845 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:58:58,845 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:58:58,846 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:58:58,846 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:58:58,846 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:58:58,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:58:58,847 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:58:58,847 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:58:58,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:58:58,848 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:58:58,848 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d79cb5dae664e13779624ff0ffbc531b419f89e2c7510a92e890992a52ee7c98 [2024-06-27 16:58:59,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:58:59,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:58:59,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:58:59,027 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:58:59,027 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:58:59,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-06-27 16:59:00,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:59:00,171 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:59:00,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2024-06-27 16:59:00,178 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc1f155e4/575ef171f34b4974baba6fff4fccea01/FLAG1e0aa924b [2024-06-27 16:59:00,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc1f155e4/575ef171f34b4974baba6fff4fccea01 [2024-06-27 16:59:00,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:59:00,191 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:59:00,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:59:00,192 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:59:00,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:59:00,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706cce41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00, skipping insertion in model container [2024-06-27 16:59:00,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,215 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:59:00,399 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-06-27 16:59:00,416 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:59:00,429 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:59:00,463 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c[3081,3094] [2024-06-27 16:59:00,469 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:59:00,484 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:59:00,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00 WrapperNode [2024-06-27 16:59:00,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:59:00,486 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:59:00,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:59:00,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:59:00,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,534 INFO L138 Inliner]: procedures = 25, calls = 35, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2024-06-27 16:59:00,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:59:00,535 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:59:00,535 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:59:00,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:59:00,544 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,544 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,546 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,557 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-06-27 16:59:00,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,565 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:59:00,577 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:59:00,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:59:00,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:59:00,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (1/1) ... [2024-06-27 16:59:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:59:00,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:00,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:59:00,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:59:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:59:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:59:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:59:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:59:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:59:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:59:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:59:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:59:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:59:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:59:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:59:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:59:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:59:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:59:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:59:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:59:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:59:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:59:00,782 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:59:00,915 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:59:00,916 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:59:01,145 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:59:01,145 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:59:01,411 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:59:01,411 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:59:01,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:59:01 BoogieIcfgContainer [2024-06-27 16:59:01,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:59:01,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:59:01,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:59:01,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:59:01,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:59:00" (1/3) ... [2024-06-27 16:59:01,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f58013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:59:01, skipping insertion in model container [2024-06-27 16:59:01,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:59:00" (2/3) ... [2024-06-27 16:59:01,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f58013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:59:01, skipping insertion in model container [2024-06-27 16:59:01,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:59:01" (3/3) ... [2024-06-27 16:59:01,420 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2024-06-27 16:59:01,429 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:59:01,438 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:59:01,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:59:01,439 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:59:01,521 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:59:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 91 flow [2024-06-27 16:59:01,609 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2024-06-27 16:59:01,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:59:01,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 3/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-06-27 16:59:01,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 91 flow [2024-06-27 16:59:01,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 31 transitions, 80 flow [2024-06-27 16:59:01,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:59:01,657 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@70d970be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:59:01,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:59:01,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:59:01,679 INFO L124 PetriNetUnfolderBase]: 3/30 cut-off events. [2024-06-27 16:59:01,679 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:59:01,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:01,680 INFO L208 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] [2024-06-27 16:59:01,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:01,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1962402328, now seen corresponding path program 1 times [2024-06-27 16:59:01,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186841127] [2024-06-27 16:59:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:02,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186841127] [2024-06-27 16:59:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186841127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:02,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:59:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143771182] [2024-06-27 16:59:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:59:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:59:02,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:59:02,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 16:59:02,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:02,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 16:59:02,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:02,234 INFO L124 PetriNetUnfolderBase]: 350/569 cut-off events. [2024-06-27 16:59:02,235 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-06-27 16:59:02,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 569 events. 350/569 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2015 event pairs, 118 based on Foata normal form. 15/571 useless extension candidates. Maximal degree in co-relation 1072. Up to 432 conditions per place. [2024-06-27 16:59:02,244 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 35 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2024-06-27 16:59:02,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 188 flow [2024-06-27 16:59:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:59:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:59:02,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-27 16:59:02,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 16:59:02,255 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 80 flow. Second operand 3 states and 66 transitions. [2024-06-27 16:59:02,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 188 flow [2024-06-27 16:59:02,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:59:02,262 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 87 flow [2024-06-27 16:59:02,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-06-27 16:59:02,266 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2024-06-27 16:59:02,266 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 87 flow [2024-06-27 16:59:02,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:02,267 INFO L208 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] [2024-06-27 16:59:02,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:59:02,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:02,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1283699602, now seen corresponding path program 2 times [2024-06-27 16:59:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:02,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848279036] [2024-06-27 16:59:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:02,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848279036] [2024-06-27 16:59:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848279036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:59:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826486136] [2024-06-27 16:59:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:02,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:59:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:59:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:59:02,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 16:59:02,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:02,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 16:59:02,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:02,614 INFO L124 PetriNetUnfolderBase]: 420/707 cut-off events. [2024-06-27 16:59:02,615 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-06-27 16:59:02,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 707 events. 420/707 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2726 event pairs, 316 based on Foata normal form. 26/710 useless extension candidates. Maximal degree in co-relation 526. Up to 547 conditions per place. [2024-06-27 16:59:02,619 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 26 selfloop transitions, 2 changer transitions 13/47 dead transitions. [2024-06-27 16:59:02,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 200 flow [2024-06-27 16:59:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:59:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:59:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-06-27 16:59:02,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 16:59:02,622 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 87 flow. Second operand 4 states and 77 transitions. [2024-06-27 16:59:02,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 200 flow [2024-06-27 16:59:02,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 16:59:02,625 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 100 flow [2024-06-27 16:59:02,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-06-27 16:59:02,626 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-06-27 16:59:02,626 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 100 flow [2024-06-27 16:59:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:02,627 INFO L208 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] [2024-06-27 16:59:02,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:59:02,628 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:02,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash -388477036, now seen corresponding path program 1 times [2024-06-27 16:59:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:02,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312657006] [2024-06-27 16:59:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:02,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:02,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312657006] [2024-06-27 16:59:02,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312657006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:02,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:02,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:59:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75915661] [2024-06-27 16:59:02,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:59:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:59:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:59:02,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 16:59:02,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:02,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 16:59:02,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:02,833 INFO L124 PetriNetUnfolderBase]: 224/390 cut-off events. [2024-06-27 16:59:02,833 INFO L125 PetriNetUnfolderBase]: For 94/97 co-relation queries the response was YES. [2024-06-27 16:59:02,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 390 events. 224/390 cut-off events. For 94/97 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1296 event pairs, 56 based on Foata normal form. 29/406 useless extension candidates. Maximal degree in co-relation 866. Up to 146 conditions per place. [2024-06-27 16:59:02,836 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 40 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-06-27 16:59:02,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 228 flow [2024-06-27 16:59:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:59:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:59:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-27 16:59:02,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 16:59:02,839 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 100 flow. Second operand 4 states and 81 transitions. [2024-06-27 16:59:02,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 228 flow [2024-06-27 16:59:02,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 51 transitions, 220 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 16:59:02,841 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 108 flow [2024-06-27 16:59:02,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-06-27 16:59:02,842 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-06-27 16:59:02,842 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 108 flow [2024-06-27 16:59:02,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:02,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:02,842 INFO L208 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] [2024-06-27 16:59:02,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:59:02,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:02,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2031575406, now seen corresponding path program 2 times [2024-06-27 16:59:02,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:02,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849144566] [2024-06-27 16:59:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849144566] [2024-06-27 16:59:02,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849144566] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:02,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378749292] [2024-06-27 16:59:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:59:02,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:02,979 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) [2024-06-27 16:59:03,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:59:03,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:59:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:03,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:59:03,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:03,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:59:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378749292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:03,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:59:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-06-27 16:59:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337951938] [2024-06-27 16:59:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:03,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:59:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:59:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:59:03,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:03,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:03,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:03,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:03,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:03,581 INFO L124 PetriNetUnfolderBase]: 548/925 cut-off events. [2024-06-27 16:59:03,581 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-06-27 16:59:03,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2179 conditions, 925 events. 548/925 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4205 event pairs, 131 based on Foata normal form. 1/923 useless extension candidates. Maximal degree in co-relation 2160. Up to 341 conditions per place. [2024-06-27 16:59:03,586 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 62 selfloop transitions, 14 changer transitions 17/97 dead transitions. [2024-06-27 16:59:03,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 467 flow [2024-06-27 16:59:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:59:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:59:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 16:59:03,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-06-27 16:59:03,589 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 108 flow. Second operand 8 states and 149 transitions. [2024-06-27 16:59:03,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 467 flow [2024-06-27 16:59:03,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 97 transitions, 447 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 16:59:03,594 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 207 flow [2024-06-27 16:59:03,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=207, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 16:59:03,596 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-06-27 16:59:03,596 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 207 flow [2024-06-27 16:59:03,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:03,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:03,596 INFO L208 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] [2024-06-27 16:59:03,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:03,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:03,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 476846050, now seen corresponding path program 3 times [2024-06-27 16:59:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965739674] [2024-06-27 16:59:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965739674] [2024-06-27 16:59:03,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965739674] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638158555] [2024-06-27 16:59:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:59:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:03,968 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) [2024-06-27 16:59:03,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:59:04,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:59:04,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:04,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:59:04,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:59:04,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:59:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638158555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:59:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-06-27 16:59:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565733429] [2024-06-27 16:59:04,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:04,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:59:04,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:59:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:59:04,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:04,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 207 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:04,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:04,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:04,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:04,443 INFO L124 PetriNetUnfolderBase]: 742/1251 cut-off events. [2024-06-27 16:59:04,443 INFO L125 PetriNetUnfolderBase]: For 1228/1233 co-relation queries the response was YES. [2024-06-27 16:59:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1251 events. 742/1251 cut-off events. For 1228/1233 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6093 event pairs, 185 based on Foata normal form. 6/1255 useless extension candidates. Maximal degree in co-relation 3579. Up to 405 conditions per place. [2024-06-27 16:59:04,450 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 64 selfloop transitions, 21 changer transitions 17/106 dead transitions. [2024-06-27 16:59:04,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 106 transitions, 627 flow [2024-06-27 16:59:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:59:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:59:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 16:59:04,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-27 16:59:04,452 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 207 flow. Second operand 8 states and 148 transitions. [2024-06-27 16:59:04,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 106 transitions, 627 flow [2024-06-27 16:59:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 106 transitions, 599 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 16:59:04,457 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 355 flow [2024-06-27 16:59:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-27 16:59:04,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-06-27 16:59:04,458 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 355 flow [2024-06-27 16:59:04,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:04,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:04,458 INFO L208 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] [2024-06-27 16:59:04,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:04,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:04,675 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:04,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:04,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1592852712, now seen corresponding path program 4 times [2024-06-27 16:59:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269555592] [2024-06-27 16:59:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269555592] [2024-06-27 16:59:04,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269555592] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:04,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616870885] [2024-06-27 16:59:04,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:59:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:04,795 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) [2024-06-27 16:59:04,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:59:04,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:59:04,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:04,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:59:04,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:04,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:04,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616870885] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:04,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:04,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-06-27 16:59:04,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052151302] [2024-06-27 16:59:04,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:04,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:59:04,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:59:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:59:04,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 16:59:04,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 355 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:04,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:04,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 16:59:04,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:05,176 INFO L124 PetriNetUnfolderBase]: 1071/1882 cut-off events. [2024-06-27 16:59:05,176 INFO L125 PetriNetUnfolderBase]: For 2867/2875 co-relation queries the response was YES. [2024-06-27 16:59:05,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5843 conditions, 1882 events. 1071/1882 cut-off events. For 2867/2875 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10720 event pairs, 580 based on Foata normal form. 37/1887 useless extension candidates. Maximal degree in co-relation 5823. Up to 868 conditions per place. [2024-06-27 16:59:05,231 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 40 selfloop transitions, 3 changer transitions 39/97 dead transitions. [2024-06-27 16:59:05,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 731 flow [2024-06-27 16:59:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:59:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:59:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 16:59:05,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-27 16:59:05,233 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 355 flow. Second operand 6 states and 112 transitions. [2024-06-27 16:59:05,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 731 flow [2024-06-27 16:59:05,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 97 transitions, 719 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:59:05,243 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 387 flow [2024-06-27 16:59:05,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 16:59:05,245 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-06-27 16:59:05,246 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 387 flow [2024-06-27 16:59:05,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:05,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:05,246 INFO L208 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] [2024-06-27 16:59:05,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:05,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:05,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:05,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -952130302, now seen corresponding path program 5 times [2024-06-27 16:59:05,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:05,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293040696] [2024-06-27 16:59:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:05,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:06,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293040696] [2024-06-27 16:59:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293040696] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963803273] [2024-06-27 16:59:06,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:59:06,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:06,482 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) [2024-06-27 16:59:06,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:59:06,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:59:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:06,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2024-06-27 16:59:06,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:06,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:59:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:06,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:07,624 INFO L378 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 82 treesize of output 74 [2024-06-27 16:59:07,668 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 16:59:07,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 125 [2024-06-27 16:59:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:07,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963803273] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:07,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:07,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-06-27 16:59:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679675528] [2024-06-27 16:59:07,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:07,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:59:07,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:07,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:59:07,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:59:07,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:07,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 387 flow. Second operand has 32 states, 32 states have (on average 9.25) internal successors, (296), 32 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:07,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:07,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:07,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:10,234 INFO L124 PetriNetUnfolderBase]: 2694/4528 cut-off events. [2024-06-27 16:59:10,234 INFO L125 PetriNetUnfolderBase]: For 9430/9435 co-relation queries the response was YES. [2024-06-27 16:59:10,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15044 conditions, 4528 events. 2694/4528 cut-off events. For 9430/9435 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28393 event pairs, 793 based on Foata normal form. 6/4525 useless extension candidates. Maximal degree in co-relation 15012. Up to 1243 conditions per place. [2024-06-27 16:59:10,260 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 218 selfloop transitions, 68 changer transitions 44/334 dead transitions. [2024-06-27 16:59:10,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 334 transitions, 2421 flow [2024-06-27 16:59:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-27 16:59:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-27 16:59:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 459 transitions. [2024-06-27 16:59:10,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683673469387755 [2024-06-27 16:59:10,263 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 387 flow. Second operand 28 states and 459 transitions. [2024-06-27 16:59:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 334 transitions, 2421 flow [2024-06-27 16:59:10,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 334 transitions, 2303 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 16:59:10,301 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 1187 flow [2024-06-27 16:59:10,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1187, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2024-06-27 16:59:10,301 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2024-06-27 16:59:10,301 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 1187 flow [2024-06-27 16:59:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.25) internal successors, (296), 32 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:10,302 INFO L208 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] [2024-06-27 16:59:10,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:10,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:10,514 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:10,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:10,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1986714814, now seen corresponding path program 6 times [2024-06-27 16:59:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897078265] [2024-06-27 16:59:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:10,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:11,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897078265] [2024-06-27 16:59:11,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897078265] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026735820] [2024-06-27 16:59:11,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:59:11,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:11,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:11,567 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) [2024-06-27 16:59:11,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:59:11,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-06-27 16:59:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:11,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:59:11,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:11,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:59:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026735820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:11,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:59:11,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-06-27 16:59:11,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159764737] [2024-06-27 16:59:11,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:59:11,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:59:11,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:59:11,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:11,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 1187 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:11,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:11,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:11,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:12,300 INFO L124 PetriNetUnfolderBase]: 2759/4668 cut-off events. [2024-06-27 16:59:12,301 INFO L125 PetriNetUnfolderBase]: For 13104/13109 co-relation queries the response was YES. [2024-06-27 16:59:12,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 4668 events. 2759/4668 cut-off events. For 13104/13109 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 29734 event pairs, 704 based on Foata normal form. 6/4662 useless extension candidates. Maximal degree in co-relation 16414. Up to 1450 conditions per place. [2024-06-27 16:59:12,342 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 90 selfloop transitions, 68 changer transitions 18/180 dead transitions. [2024-06-27 16:59:12,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 180 transitions, 1741 flow [2024-06-27 16:59:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:59:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:59:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 16:59:12,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-27 16:59:12,344 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 1187 flow. Second operand 8 states and 152 transitions. [2024-06-27 16:59:12,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 180 transitions, 1741 flow [2024-06-27 16:59:12,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 180 transitions, 1639 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 16:59:12,400 INFO L231 Difference]: Finished difference. Result has 88 places, 126 transitions, 1283 flow [2024-06-27 16:59:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1283, PETRI_PLACES=88, PETRI_TRANSITIONS=126} [2024-06-27 16:59:12,403 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-06-27 16:59:12,403 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 126 transitions, 1283 flow [2024-06-27 16:59:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:12,403 INFO L208 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] [2024-06-27 16:59:12,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-06-27 16:59:12,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:12,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:12,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1632198074, now seen corresponding path program 7 times [2024-06-27 16:59:12,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:12,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4997670] [2024-06-27 16:59:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:12,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:13,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4997670] [2024-06-27 16:59:13,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4997670] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:13,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992288262] [2024-06-27 16:59:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 16:59:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:13,548 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) [2024-06-27 16:59:13,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:59:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:13,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2024-06-27 16:59:13,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:13,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:14,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:59:14,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2024-06-27 16:59:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992288262] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:14,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-06-27 16:59:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405995930] [2024-06-27 16:59:14,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-06-27 16:59:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-06-27 16:59:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2024-06-27 16:59:14,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 126 transitions, 1283 flow. Second operand has 32 states, 32 states have (on average 9.25) internal successors, (296), 32 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:16,743 INFO L124 PetriNetUnfolderBase]: 3173/5491 cut-off events. [2024-06-27 16:59:16,743 INFO L125 PetriNetUnfolderBase]: For 19793/19827 co-relation queries the response was YES. [2024-06-27 16:59:16,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19504 conditions, 5491 events. 3173/5491 cut-off events. For 19793/19827 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 36755 event pairs, 722 based on Foata normal form. 36/5524 useless extension candidates. Maximal degree in co-relation 19453. Up to 1020 conditions per place. [2024-06-27 16:59:16,771 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 157 selfloop transitions, 91 changer transitions 44/296 dead transitions. [2024-06-27 16:59:16,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 296 transitions, 2545 flow [2024-06-27 16:59:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 16:59:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 16:59:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 377 transitions. [2024-06-27 16:59:16,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683229813664596 [2024-06-27 16:59:16,773 INFO L175 Difference]: Start difference. First operand has 88 places, 126 transitions, 1283 flow. Second operand 23 states and 377 transitions. [2024-06-27 16:59:16,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 296 transitions, 2545 flow [2024-06-27 16:59:16,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 296 transitions, 2408 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 16:59:16,827 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1668 flow [2024-06-27 16:59:16,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1668, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-27 16:59:16,828 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2024-06-27 16:59:16,828 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1668 flow [2024-06-27 16:59:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.25) internal successors, (296), 32 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:16,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:16,829 INFO L208 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] [2024-06-27 16:59:16,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-06-27 16:59:17,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:17,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:17,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:17,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1194065612, now seen corresponding path program 8 times [2024-06-27 16:59:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:17,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411050768] [2024-06-27 16:59:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:17,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411050768] [2024-06-27 16:59:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411050768] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680870820] [2024-06-27 16:59:17,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:59:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:17,807 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) [2024-06-27 16:59:17,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:59:17,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-06-27 16:59:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:17,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 15 conjunts are in the unsatisfiable core [2024-06-27 16:59:17,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:18,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:59:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680870820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:18,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:59:18,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2024-06-27 16:59:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120142161] [2024-06-27 16:59:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:59:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:59:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-06-27 16:59:18,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:18,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1668 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:18,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:18,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:18,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:18,615 INFO L124 PetriNetUnfolderBase]: 3213/5541 cut-off events. [2024-06-27 16:59:18,615 INFO L125 PetriNetUnfolderBase]: For 26806/26837 co-relation queries the response was YES. [2024-06-27 16:59:18,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21219 conditions, 5541 events. 3213/5541 cut-off events. For 26806/26837 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 36681 event pairs, 1005 based on Foata normal form. 25/5563 useless extension candidates. Maximal degree in co-relation 21152. Up to 2354 conditions per place. [2024-06-27 16:59:18,646 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 115 selfloop transitions, 60 changer transitions 18/197 dead transitions. [2024-06-27 16:59:18,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 197 transitions, 2270 flow [2024-06-27 16:59:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:59:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:59:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 16:59:18,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-27 16:59:18,647 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1668 flow. Second operand 8 states and 141 transitions. [2024-06-27 16:59:18,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 197 transitions, 2270 flow [2024-06-27 16:59:18,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 197 transitions, 2177 flow, removed 33 selfloop flow, removed 10 redundant places. [2024-06-27 16:59:18,749 INFO L231 Difference]: Finished difference. Result has 108 places, 150 transitions, 1765 flow [2024-06-27 16:59:18,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1583, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1765, PETRI_PLACES=108, PETRI_TRANSITIONS=150} [2024-06-27 16:59:18,749 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2024-06-27 16:59:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 150 transitions, 1765 flow [2024-06-27 16:59:18,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:18,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:18,750 INFO L208 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, 1] [2024-06-27 16:59:18,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:18,962 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1646784127, now seen corresponding path program 1 times [2024-06-27 16:59:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727765052] [2024-06-27 16:59:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:18,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727765052] [2024-06-27 16:59:19,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727765052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268470489] [2024-06-27 16:59:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:19,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:19,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:59:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:19,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:59:19,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:19,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:19,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268470489] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:19,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:59:19,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-06-27 16:59:19,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411398179] [2024-06-27 16:59:19,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:19,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:59:19,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:59:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:59:19,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:19,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 1765 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:19,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:19,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:19,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:19,790 INFO L124 PetriNetUnfolderBase]: 4335/7133 cut-off events. [2024-06-27 16:59:19,790 INFO L125 PetriNetUnfolderBase]: For 36540/36548 co-relation queries the response was YES. [2024-06-27 16:59:19,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26239 conditions, 7133 events. 4335/7133 cut-off events. For 36540/36548 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 45682 event pairs, 990 based on Foata normal form. 4/6245 useless extension candidates. Maximal degree in co-relation 26177. Up to 3306 conditions per place. [2024-06-27 16:59:19,834 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 181 selfloop transitions, 10 changer transitions 0/230 dead transitions. [2024-06-27 16:59:19,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 230 transitions, 3139 flow [2024-06-27 16:59:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:59:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:59:19,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-27 16:59:19,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 16:59:19,836 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 1765 flow. Second operand 4 states and 88 transitions. [2024-06-27 16:59:19,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 230 transitions, 3139 flow [2024-06-27 16:59:20,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 230 transitions, 2955 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 16:59:20,049 INFO L231 Difference]: Finished difference. Result has 107 places, 157 transitions, 1761 flow [2024-06-27 16:59:20,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1643, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1761, PETRI_PLACES=107, PETRI_TRANSITIONS=157} [2024-06-27 16:59:20,050 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2024-06-27 16:59:20,050 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 157 transitions, 1761 flow [2024-06-27 16:59:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:20,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:20,050 INFO L208 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, 1] [2024-06-27 16:59:20,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:20,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-06-27 16:59:20,262 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:20,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash -853554891, now seen corresponding path program 2 times [2024-06-27 16:59:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783398554] [2024-06-27 16:59:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:20,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783398554] [2024-06-27 16:59:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783398554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:20,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:20,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:59:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270819895] [2024-06-27 16:59:20,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:59:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:59:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:59:20,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:20,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 157 transitions, 1761 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:20,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:20,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:20,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:21,004 INFO L124 PetriNetUnfolderBase]: 4500/7610 cut-off events. [2024-06-27 16:59:21,005 INFO L125 PetriNetUnfolderBase]: For 34196/34219 co-relation queries the response was YES. [2024-06-27 16:59:21,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29003 conditions, 7610 events. 4500/7610 cut-off events. For 34196/34219 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 51899 event pairs, 2306 based on Foata normal form. 51/7568 useless extension candidates. Maximal degree in co-relation 28218. Up to 5467 conditions per place. [2024-06-27 16:59:21,051 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 145 selfloop transitions, 23 changer transitions 9/216 dead transitions. [2024-06-27 16:59:21,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 216 transitions, 2679 flow [2024-06-27 16:59:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:59:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:59:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 16:59:21,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-06-27 16:59:21,052 INFO L175 Difference]: Start difference. First operand has 107 places, 157 transitions, 1761 flow. Second operand 5 states and 93 transitions. [2024-06-27 16:59:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 216 transitions, 2679 flow [2024-06-27 16:59:21,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 216 transitions, 2679 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:59:21,258 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1932 flow [2024-06-27 16:59:21,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1932, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-27 16:59:21,259 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 76 predicate places. [2024-06-27 16:59:21,259 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1932 flow [2024-06-27 16:59:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:21,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:21,259 INFO L208 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, 1] [2024-06-27 16:59:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 16:59:21,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:21,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1342553636, now seen corresponding path program 1 times [2024-06-27 16:59:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:21,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57770539] [2024-06-27 16:59:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:21,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:21,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57770539] [2024-06-27 16:59:21,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57770539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:21,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:21,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:59:21,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381071534] [2024-06-27 16:59:21,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:21,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:59:21,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:59:21,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:59:21,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1932 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:21,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:21,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:21,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:21,985 INFO L124 PetriNetUnfolderBase]: 4615/7974 cut-off events. [2024-06-27 16:59:21,985 INFO L125 PetriNetUnfolderBase]: For 43027/43053 co-relation queries the response was YES. [2024-06-27 16:59:22,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33482 conditions, 7974 events. 4615/7974 cut-off events. For 43027/43053 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 55860 event pairs, 2041 based on Foata normal form. 140/8033 useless extension candidates. Maximal degree in co-relation 32408. Up to 4916 conditions per place. [2024-06-27 16:59:22,034 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 154 selfloop transitions, 35 changer transitions 13/239 dead transitions. [2024-06-27 16:59:22,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 239 transitions, 3166 flow [2024-06-27 16:59:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:59:22,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:59:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-27 16:59:22,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-06-27 16:59:22,035 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1932 flow. Second operand 5 states and 94 transitions. [2024-06-27 16:59:22,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 239 transitions, 3166 flow [2024-06-27 16:59:22,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 239 transitions, 3150 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-27 16:59:22,289 INFO L231 Difference]: Finished difference. Result has 121 places, 173 transitions, 2085 flow [2024-06-27 16:59:22,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2085, PETRI_PLACES=121, PETRI_TRANSITIONS=173} [2024-06-27 16:59:22,290 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2024-06-27 16:59:22,290 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 173 transitions, 2085 flow [2024-06-27 16:59:22,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:22,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:22,291 INFO L208 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, 1] [2024-06-27 16:59:22,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 16:59:22,291 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:22,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1265601632, now seen corresponding path program 2 times [2024-06-27 16:59:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:22,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251995412] [2024-06-27 16:59:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:22,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:22,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251995412] [2024-06-27 16:59:22,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251995412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:22,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:22,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:59:22,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170400954] [2024-06-27 16:59:22,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:22,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:59:22,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:59:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:59:22,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:22,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 173 transitions, 2085 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:22,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:22,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:22,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:23,075 INFO L124 PetriNetUnfolderBase]: 4819/8308 cut-off events. [2024-06-27 16:59:23,075 INFO L125 PetriNetUnfolderBase]: For 50015/50061 co-relation queries the response was YES. [2024-06-27 16:59:23,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38212 conditions, 8308 events. 4819/8308 cut-off events. For 50015/50061 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 58487 event pairs, 750 based on Foata normal form. 93/8343 useless extension candidates. Maximal degree in co-relation 36772. Up to 3891 conditions per place. [2024-06-27 16:59:23,209 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 191 selfloop transitions, 40 changer transitions 8/276 dead transitions. [2024-06-27 16:59:23,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 276 transitions, 3730 flow [2024-06-27 16:59:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:59:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:59:23,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 16:59:23,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-27 16:59:23,210 INFO L175 Difference]: Start difference. First operand has 121 places, 173 transitions, 2085 flow. Second operand 7 states and 135 transitions. [2024-06-27 16:59:23,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 276 transitions, 3730 flow [2024-06-27 16:59:23,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 276 transitions, 3714 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 16:59:23,387 INFO L231 Difference]: Finished difference. Result has 127 places, 178 transitions, 2252 flow [2024-06-27 16:59:23,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2252, PETRI_PLACES=127, PETRI_TRANSITIONS=178} [2024-06-27 16:59:23,388 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 89 predicate places. [2024-06-27 16:59:23,388 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 178 transitions, 2252 flow [2024-06-27 16:59:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:23,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:23,388 INFO L208 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, 1] [2024-06-27 16:59:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 16:59:23,389 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:23,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash 747233996, now seen corresponding path program 3 times [2024-06-27 16:59:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:23,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577578076] [2024-06-27 16:59:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:23,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577578076] [2024-06-27 16:59:23,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577578076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:23,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:23,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:59:23,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966903803] [2024-06-27 16:59:23,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:23,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:59:23,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:23,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:59:23,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:59:23,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:23,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 178 transitions, 2252 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:23,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:23,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:23,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:24,270 INFO L124 PetriNetUnfolderBase]: 4762/8282 cut-off events. [2024-06-27 16:59:24,270 INFO L125 PetriNetUnfolderBase]: For 59696/59801 co-relation queries the response was YES. [2024-06-27 16:59:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39266 conditions, 8282 events. 4762/8282 cut-off events. For 59696/59801 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 59072 event pairs, 1548 based on Foata normal form. 321/8473 useless extension candidates. Maximal degree in co-relation 38574. Up to 3540 conditions per place. [2024-06-27 16:59:24,318 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 156 selfloop transitions, 30 changer transitions 15/235 dead transitions. [2024-06-27 16:59:24,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 235 transitions, 3185 flow [2024-06-27 16:59:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:59:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:59:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 16:59:24,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-06-27 16:59:24,319 INFO L175 Difference]: Start difference. First operand has 127 places, 178 transitions, 2252 flow. Second operand 5 states and 103 transitions. [2024-06-27 16:59:24,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 235 transitions, 3185 flow [2024-06-27 16:59:24,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 235 transitions, 3091 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 16:59:24,556 INFO L231 Difference]: Finished difference. Result has 129 places, 171 transitions, 2153 flow [2024-06-27 16:59:24,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2153, PETRI_PLACES=129, PETRI_TRANSITIONS=171} [2024-06-27 16:59:24,557 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 91 predicate places. [2024-06-27 16:59:24,557 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 171 transitions, 2153 flow [2024-06-27 16:59:24,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:24,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:24,557 INFO L208 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, 1] [2024-06-27 16:59:24,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 16:59:24,558 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:24,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2008831494, now seen corresponding path program 4 times [2024-06-27 16:59:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915412941] [2024-06-27 16:59:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915412941] [2024-06-27 16:59:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915412941] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125275365] [2024-06-27 16:59:24,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:59:24,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:24,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:24,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:59:24,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:59:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:24,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:59:24,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:24,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:24,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125275365] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:24,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:24,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-06-27 16:59:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578502130] [2024-06-27 16:59:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:24,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:59:24,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:24,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:59:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 16:59:24,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:24,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 171 transitions, 2153 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:24,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:24,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:24,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:25,542 INFO L124 PetriNetUnfolderBase]: 3981/6947 cut-off events. [2024-06-27 16:59:25,543 INFO L125 PetriNetUnfolderBase]: For 48580/48608 co-relation queries the response was YES. [2024-06-27 16:59:25,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33477 conditions, 6947 events. 3981/6947 cut-off events. For 48580/48608 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48594 event pairs, 1324 based on Foata normal form. 124/6995 useless extension candidates. Maximal degree in co-relation 33097. Up to 3599 conditions per place. [2024-06-27 16:59:25,591 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 150 selfloop transitions, 44 changer transitions 16/241 dead transitions. [2024-06-27 16:59:25,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 241 transitions, 3254 flow [2024-06-27 16:59:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:59:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:59:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 16:59:25,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2024-06-27 16:59:25,593 INFO L175 Difference]: Start difference. First operand has 129 places, 171 transitions, 2153 flow. Second operand 7 states and 128 transitions. [2024-06-27 16:59:25,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 241 transitions, 3254 flow [2024-06-27 16:59:25,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 241 transitions, 3138 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 16:59:25,813 INFO L231 Difference]: Finished difference. Result has 128 places, 158 transitions, 1981 flow [2024-06-27 16:59:25,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1981, PETRI_PLACES=128, PETRI_TRANSITIONS=158} [2024-06-27 16:59:25,813 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 90 predicate places. [2024-06-27 16:59:25,814 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 158 transitions, 1981 flow [2024-06-27 16:59:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:25,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:25,814 INFO L208 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, 1] [2024-06-27 16:59:25,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:59:26,015 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:26,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash -111585165, now seen corresponding path program 3 times [2024-06-27 16:59:26,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:26,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016286877] [2024-06-27 16:59:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:59:26,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016286877] [2024-06-27 16:59:26,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016286877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:26,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:59:26,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 16:59:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319433438] [2024-06-27 16:59:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:26,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:59:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:59:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:59:26,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:26,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 158 transitions, 1981 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:26,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:26,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:26,725 INFO L124 PetriNetUnfolderBase]: 3417/5938 cut-off events. [2024-06-27 16:59:26,725 INFO L125 PetriNetUnfolderBase]: For 44385/44429 co-relation queries the response was YES. [2024-06-27 16:59:26,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29748 conditions, 5938 events. 3417/5938 cut-off events. For 44385/44429 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 38924 event pairs, 1209 based on Foata normal form. 108/5972 useless extension candidates. Maximal degree in co-relation 29381. Up to 3152 conditions per place. [2024-06-27 16:59:26,787 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 123 selfloop transitions, 17 changer transitions 25/191 dead transitions. [2024-06-27 16:59:26,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 191 transitions, 2590 flow [2024-06-27 16:59:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:59:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:59:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-27 16:59:26,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542857142857143 [2024-06-27 16:59:26,789 INFO L175 Difference]: Start difference. First operand has 128 places, 158 transitions, 1981 flow. Second operand 5 states and 97 transitions. [2024-06-27 16:59:26,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 191 transitions, 2590 flow [2024-06-27 16:59:26,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 191 transitions, 2457 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 16:59:26,969 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1663 flow [2024-06-27 16:59:26,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1663, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-27 16:59:26,969 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 86 predicate places. [2024-06-27 16:59:26,969 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1663 flow [2024-06-27 16:59:26,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:26,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:26,969 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:59:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 16:59:26,970 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:26,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:26,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1406775322, now seen corresponding path program 9 times [2024-06-27 16:59:26,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738552596] [2024-06-27 16:59:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:28,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738552596] [2024-06-27 16:59:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738552596] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:28,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042990687] [2024-06-27 16:59:28,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:59:28,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:28,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:28,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:59:28,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-06-27 16:59:28,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:28,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2024-06-27 16:59:28,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-06-27 16:59:28,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-27 16:59:28,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042990687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:59:28,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-27 16:59:28,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 21 [2024-06-27 16:59:28,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803370651] [2024-06-27 16:59:28,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:59:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:59:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:59:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:59:28,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:28,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1663 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:28,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:28,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:28,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:29,351 INFO L124 PetriNetUnfolderBase]: 3250/5721 cut-off events. [2024-06-27 16:59:29,351 INFO L125 PetriNetUnfolderBase]: For 37778/37829 co-relation queries the response was YES. [2024-06-27 16:59:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27825 conditions, 5721 events. 3250/5721 cut-off events. For 37778/37829 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 38182 event pairs, 1074 based on Foata normal form. 26/5708 useless extension candidates. Maximal degree in co-relation 27480. Up to 2358 conditions per place. [2024-06-27 16:59:29,465 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 93 selfloop transitions, 49 changer transitions 32/190 dead transitions. [2024-06-27 16:59:29,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 2251 flow [2024-06-27 16:59:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:59:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:59:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 16:59:29,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-27 16:59:29,466 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1663 flow. Second operand 8 states and 142 transitions. [2024-06-27 16:59:29,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 2251 flow [2024-06-27 16:59:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 190 transitions, 2169 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 16:59:29,531 INFO L231 Difference]: Finished difference. Result has 122 places, 134 transitions, 1629 flow [2024-06-27 16:59:29,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1629, PETRI_PLACES=122, PETRI_TRANSITIONS=134} [2024-06-27 16:59:29,532 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2024-06-27 16:59:29,532 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 134 transitions, 1629 flow [2024-06-27 16:59:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:29,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:29,532 INFO L208 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, 1, 1, 1, 1] [2024-06-27 16:59:29,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:29,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-27 16:59:29,740 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:29,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:29,741 INFO L85 PathProgramCache]: Analyzing trace with hash 208255937, now seen corresponding path program 1 times [2024-06-27 16:59:29,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:29,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837607507] [2024-06-27 16:59:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:29,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837607507] [2024-06-27 16:59:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837607507] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293774897] [2024-06-27 16:59:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:30,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:30,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:30,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:30,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:59:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:30,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 16:59:30,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:30,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 16:59:31,056 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 16:59:31,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2024-06-27 16:59:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:31,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:32,443 INFO L378 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 81 treesize of output 73 [2024-06-27 16:59:32,489 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 16:59:32,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 160 [2024-06-27 16:59:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:34,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293774897] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:34,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:34,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 16:59:34,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044127914] [2024-06-27 16:59:34,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:34,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:59:34,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:59:34,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:59:34,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:34,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 1629 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:34,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:34,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:34,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:42,604 INFO L124 PetriNetUnfolderBase]: 3856/6703 cut-off events. [2024-06-27 16:59:42,604 INFO L125 PetriNetUnfolderBase]: For 41989/42059 co-relation queries the response was YES. [2024-06-27 16:59:42,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31742 conditions, 6703 events. 3856/6703 cut-off events. For 41989/42059 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 44840 event pairs, 1447 based on Foata normal form. 57/6679 useless extension candidates. Maximal degree in co-relation 31687. Up to 3087 conditions per place. [2024-06-27 16:59:42,645 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 241 selfloop transitions, 53 changer transitions 34/344 dead transitions. [2024-06-27 16:59:42,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 344 transitions, 3439 flow [2024-06-27 16:59:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:59:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:59:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 431 transitions. [2024-06-27 16:59:42,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560846560846561 [2024-06-27 16:59:42,647 INFO L175 Difference]: Start difference. First operand has 122 places, 134 transitions, 1629 flow. Second operand 27 states and 431 transitions. [2024-06-27 16:59:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 344 transitions, 3439 flow [2024-06-27 16:59:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 344 transitions, 3303 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 16:59:42,704 INFO L231 Difference]: Finished difference. Result has 143 places, 163 transitions, 1967 flow [2024-06-27 16:59:42,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1967, PETRI_PLACES=143, PETRI_TRANSITIONS=163} [2024-06-27 16:59:42,704 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2024-06-27 16:59:42,704 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 163 transitions, 1967 flow [2024-06-27 16:59:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:42,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:42,706 INFO L208 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, 1, 1, 1, 1] [2024-06-27 16:59:42,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:42,917 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1674729363, now seen corresponding path program 2 times [2024-06-27 16:59:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999615272] [2024-06-27 16:59:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:44,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999615272] [2024-06-27 16:59:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999615272] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665994562] [2024-06-27 16:59:44,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:59:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:44,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:44,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:59:44,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:59:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:44,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:59:44,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:44,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:59:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:44,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:45,580 INFO L378 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 78 treesize of output 70 [2024-06-27 16:59:45,612 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 16:59:45,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2024-06-27 16:59:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:45,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665994562] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:45,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:45,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 16:59:45,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685053221] [2024-06-27 16:59:45,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:59:45,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:59:45,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:59:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:45,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 163 transitions, 1967 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:59:53,255 INFO L124 PetriNetUnfolderBase]: 5518/9635 cut-off events. [2024-06-27 16:59:53,255 INFO L125 PetriNetUnfolderBase]: For 62935/63015 co-relation queries the response was YES. [2024-06-27 16:59:53,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47347 conditions, 9635 events. 5518/9635 cut-off events. For 62935/63015 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69583 event pairs, 1145 based on Foata normal form. 61/9654 useless extension candidates. Maximal degree in co-relation 47281. Up to 1355 conditions per place. [2024-06-27 16:59:53,330 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 379 selfloop transitions, 154 changer transitions 44/593 dead transitions. [2024-06-27 16:59:53,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 593 transitions, 6209 flow [2024-06-27 16:59:53,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-06-27 16:59:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-06-27 16:59:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 765 transitions. [2024-06-27 16:59:53,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46504559270516715 [2024-06-27 16:59:53,332 INFO L175 Difference]: Start difference. First operand has 143 places, 163 transitions, 1967 flow. Second operand 47 states and 765 transitions. [2024-06-27 16:59:53,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 593 transitions, 6209 flow [2024-06-27 16:59:53,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 593 transitions, 6036 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-06-27 16:59:53,534 INFO L231 Difference]: Finished difference. Result has 192 places, 247 transitions, 3464 flow [2024-06-27 16:59:53,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3464, PETRI_PLACES=192, PETRI_TRANSITIONS=247} [2024-06-27 16:59:53,534 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2024-06-27 16:59:53,534 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 247 transitions, 3464 flow [2024-06-27 16:59:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:53,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:59:53,535 INFO L208 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, 1, 1, 1, 1] [2024-06-27 16:59:53,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:59:53,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:53,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:59:53,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:59:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash 899290235, now seen corresponding path program 3 times [2024-06-27 16:59:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:59:53,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814757952] [2024-06-27 16:59:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:59:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:59:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:59:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:59:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814757952] [2024-06-27 16:59:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814757952] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:59:55,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036879627] [2024-06-27 16:59:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:59:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:59:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:59:55,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:59:55,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:59:55,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:59:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:59:55,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 16:59:55,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:59:55,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 16:59:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:55,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:59:56,371 INFO L378 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 78 treesize of output 70 [2024-06-27 16:59:56,402 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 16:59:56,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2024-06-27 16:59:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:59:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036879627] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:59:56,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:59:56,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 16:59:56,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611219102] [2024-06-27 16:59:56,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:59:56,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 16:59:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:59:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 16:59:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 16:59:56,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 16:59:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 247 transitions, 3464 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:59:56,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:59:56,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 16:59:56,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:02,047 INFO L124 PetriNetUnfolderBase]: 6115/10742 cut-off events. [2024-06-27 17:00:02,047 INFO L125 PetriNetUnfolderBase]: For 85581/85681 co-relation queries the response was YES. [2024-06-27 17:00:02,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55163 conditions, 10742 events. 6115/10742 cut-off events. For 85581/85681 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 79355 event pairs, 1621 based on Foata normal form. 81/10774 useless extension candidates. Maximal degree in co-relation 55083. Up to 1554 conditions per place. [2024-06-27 17:00:02,136 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 357 selfloop transitions, 124 changer transitions 35/532 dead transitions. [2024-06-27 17:00:02,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 532 transitions, 6376 flow [2024-06-27 17:00:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-06-27 17:00:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-06-27 17:00:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 543 transitions. [2024-06-27 17:00:02,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701298701298701 [2024-06-27 17:00:02,138 INFO L175 Difference]: Start difference. First operand has 192 places, 247 transitions, 3464 flow. Second operand 33 states and 543 transitions. [2024-06-27 17:00:02,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 532 transitions, 6376 flow [2024-06-27 17:00:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 532 transitions, 5784 flow, removed 239 selfloop flow, removed 19 redundant places. [2024-06-27 17:00:02,498 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3516 flow [2024-06-27 17:00:02,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3516, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-27 17:00:02,499 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 173 predicate places. [2024-06-27 17:00:02,499 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3516 flow [2024-06-27 17:00:02,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:02,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:02,499 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:02,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:02,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-06-27 17:00:02,700 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:02,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1873440817, now seen corresponding path program 4 times [2024-06-27 17:00:02,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:02,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447075192] [2024-06-27 17:00:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:02,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:04,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447075192] [2024-06-27 17:00:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447075192] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031501394] [2024-06-27 17:00:04,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:00:04,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:04,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:04,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-27 17:00:04,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:00:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:04,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:00:04,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:04,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:00:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:05,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:05,824 INFO L378 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 117 treesize of output 105 [2024-06-27 17:00:05,858 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:00:05,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 162 [2024-06-27 17:00:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031501394] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:06,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:06,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 17:00:06,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346879362] [2024-06-27 17:00:06,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:06,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 17:00:06,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:06,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 17:00:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 17:00:06,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:00:06,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3516 flow. Second operand has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:06,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:06,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:00:06,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:13,025 INFO L124 PetriNetUnfolderBase]: 6474/11444 cut-off events. [2024-06-27 17:00:13,025 INFO L125 PetriNetUnfolderBase]: For 76526/76621 co-relation queries the response was YES. [2024-06-27 17:00:13,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55472 conditions, 11444 events. 6474/11444 cut-off events. For 76526/76621 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 85856 event pairs, 1460 based on Foata normal form. 67/11472 useless extension candidates. Maximal degree in co-relation 55382. Up to 1554 conditions per place. [2024-06-27 17:00:13,122 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 415 selfloop transitions, 162 changer transitions 54/647 dead transitions. [2024-06-27 17:00:13,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 647 transitions, 6916 flow [2024-06-27 17:00:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 17:00:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 17:00:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 813 transitions. [2024-06-27 17:00:13,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45546218487394957 [2024-06-27 17:00:13,124 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3516 flow. Second operand 51 states and 813 transitions. [2024-06-27 17:00:13,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 647 transitions, 6916 flow [2024-06-27 17:00:13,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 647 transitions, 6726 flow, removed 16 selfloop flow, removed 21 redundant places. [2024-06-27 17:00:13,413 INFO L231 Difference]: Finished difference. Result has 246 places, 278 transitions, 3836 flow [2024-06-27 17:00:13,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3836, PETRI_PLACES=246, PETRI_TRANSITIONS=278} [2024-06-27 17:00:13,414 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2024-06-27 17:00:13,414 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 278 transitions, 3836 flow [2024-06-27 17:00:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:13,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:13,414 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:13,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:13,615 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:13,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1074656107, now seen corresponding path program 5 times [2024-06-27 17:00:13,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:13,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086029210] [2024-06-27 17:00:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086029210] [2024-06-27 17:00:14,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086029210] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:14,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482103051] [2024-06-27 17:00:14,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:00:14,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:14,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:14,917 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:14,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-27 17:00:14,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:00:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:15,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:00:15,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:15,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:00:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:15,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:16,376 INFO L378 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 117 treesize of output 105 [2024-06-27 17:00:16,407 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:00:16,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 221 treesize of output 166 [2024-06-27 17:00:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:16,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482103051] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:16,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:16,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 17:00:16,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486605040] [2024-06-27 17:00:16,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:16,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 17:00:16,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 17:00:16,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 17:00:16,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:00:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 278 transitions, 3836 flow. Second operand has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:00:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:24,020 INFO L124 PetriNetUnfolderBase]: 6560/11611 cut-off events. [2024-06-27 17:00:24,020 INFO L125 PetriNetUnfolderBase]: For 82519/82619 co-relation queries the response was YES. [2024-06-27 17:00:24,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57738 conditions, 11611 events. 6560/11611 cut-off events. For 82519/82619 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 87589 event pairs, 1355 based on Foata normal form. 81/11643 useless extension candidates. Maximal degree in co-relation 57642. Up to 1612 conditions per place. [2024-06-27 17:00:24,121 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 357 selfloop transitions, 158 changer transitions 44/575 dead transitions. [2024-06-27 17:00:24,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 575 transitions, 6682 flow [2024-06-27 17:00:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-06-27 17:00:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-06-27 17:00:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 626 transitions. [2024-06-27 17:00:24,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586080586080586 [2024-06-27 17:00:24,123 INFO L175 Difference]: Start difference. First operand has 246 places, 278 transitions, 3836 flow. Second operand 39 states and 626 transitions. [2024-06-27 17:00:24,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 575 transitions, 6682 flow [2024-06-27 17:00:24,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 575 transitions, 6336 flow, removed 42 selfloop flow, removed 39 redundant places. [2024-06-27 17:00:24,442 INFO L231 Difference]: Finished difference. Result has 247 places, 287 transitions, 4013 flow [2024-06-27 17:00:24,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=4013, PETRI_PLACES=247, PETRI_TRANSITIONS=287} [2024-06-27 17:00:24,442 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 209 predicate places. [2024-06-27 17:00:24,442 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 287 transitions, 4013 flow [2024-06-27 17:00:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:24,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:24,443 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:24,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:24,643 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:24,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:24,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1321484769, now seen corresponding path program 6 times [2024-06-27 17:00:24,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:24,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097031284] [2024-06-27 17:00:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:25,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097031284] [2024-06-27 17:00:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097031284] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219632361] [2024-06-27 17:00:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:00:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:25,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:25,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-27 17:00:25,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:00:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:25,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:00:25,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:25,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:00:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:26,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:27,086 INFO L378 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 119 treesize of output 107 [2024-06-27 17:00:27,121 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:00:27,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 164 [2024-06-27 17:00:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219632361] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:27,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:27,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-06-27 17:00:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597688445] [2024-06-27 17:00:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:00:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:00:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:00:27,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:00:27,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 287 transitions, 4013 flow. Second operand has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:27,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:27,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:00:27,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:33,078 INFO L124 PetriNetUnfolderBase]: 7143/12627 cut-off events. [2024-06-27 17:00:33,078 INFO L125 PetriNetUnfolderBase]: For 92319/92431 co-relation queries the response was YES. [2024-06-27 17:00:33,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63064 conditions, 12627 events. 7143/12627 cut-off events. For 92319/92431 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 96268 event pairs, 2242 based on Foata normal form. 94/12647 useless extension candidates. Maximal degree in co-relation 62968. Up to 1962 conditions per place. [2024-06-27 17:00:33,194 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 395 selfloop transitions, 155 changer transitions 36/602 dead transitions. [2024-06-27 17:00:33,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 602 transitions, 7181 flow [2024-06-27 17:00:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-06-27 17:00:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-06-27 17:00:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 654 transitions. [2024-06-27 17:00:33,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45574912891986064 [2024-06-27 17:00:33,196 INFO L175 Difference]: Start difference. First operand has 247 places, 287 transitions, 4013 flow. Second operand 41 states and 654 transitions. [2024-06-27 17:00:33,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 602 transitions, 7181 flow [2024-06-27 17:00:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 602 transitions, 6937 flow, removed 23 selfloop flow, removed 25 redundant places. [2024-06-27 17:00:33,577 INFO L231 Difference]: Finished difference. Result has 266 places, 312 transitions, 4486 flow [2024-06-27 17:00:33,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4486, PETRI_PLACES=266, PETRI_TRANSITIONS=312} [2024-06-27 17:00:33,577 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 228 predicate places. [2024-06-27 17:00:33,577 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 312 transitions, 4486 flow [2024-06-27 17:00:33,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:33,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:33,578 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-06-27 17:00:33,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-27 17:00:33,778 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:33,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:33,779 INFO L85 PathProgramCache]: Analyzing trace with hash 26733637, now seen corresponding path program 7 times [2024-06-27 17:00:33,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:33,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477897281] [2024-06-27 17:00:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:33,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:34,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:34,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477897281] [2024-06-27 17:00:34,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477897281] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:34,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725072225] [2024-06-27 17:00:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:00:34,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:34,939 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-27 17:00:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:35,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:00:35,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:35,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:00:35,451 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 17:00:35,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2024-06-27 17:00:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:35,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:36,689 INFO L378 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 120 treesize of output 108 [2024-06-27 17:00:36,731 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:00:36,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 184 [2024-06-27 17:00:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:38,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725072225] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:38,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:38,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-06-27 17:00:38,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638457498] [2024-06-27 17:00:38,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:00:38,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:38,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:00:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:00:38,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:00:38,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 312 transitions, 4486 flow. Second operand has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:38,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:38,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:00:38,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:46,186 INFO L124 PetriNetUnfolderBase]: 7391/13023 cut-off events. [2024-06-27 17:00:46,186 INFO L125 PetriNetUnfolderBase]: For 104949/105074 co-relation queries the response was YES. [2024-06-27 17:00:46,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66968 conditions, 13023 events. 7391/13023 cut-off events. For 104949/105074 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 99637 event pairs, 2987 based on Foata normal form. 112/13026 useless extension candidates. Maximal degree in co-relation 66872. Up to 5675 conditions per place. [2024-06-27 17:00:46,299 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 343 selfloop transitions, 99 changer transitions 35/493 dead transitions. [2024-06-27 17:00:46,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 493 transitions, 6437 flow [2024-06-27 17:00:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:00:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:00:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 409 transitions. [2024-06-27 17:00:46,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44945054945054946 [2024-06-27 17:00:46,301 INFO L175 Difference]: Start difference. First operand has 266 places, 312 transitions, 4486 flow. Second operand 26 states and 409 transitions. [2024-06-27 17:00:46,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 493 transitions, 6437 flow [2024-06-27 17:00:46,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 493 transitions, 6187 flow, removed 44 selfloop flow, removed 25 redundant places. [2024-06-27 17:00:46,758 INFO L231 Difference]: Finished difference. Result has 270 places, 325 transitions, 4701 flow [2024-06-27 17:00:46,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4701, PETRI_PLACES=270, PETRI_TRANSITIONS=325} [2024-06-27 17:00:46,758 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 232 predicate places. [2024-06-27 17:00:46,759 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 325 transitions, 4701 flow [2024-06-27 17:00:46,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:46,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:46,759 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:46,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:46,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:46,968 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:46,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -88131895, now seen corresponding path program 8 times [2024-06-27 17:00:46,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:46,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125744203] [2024-06-27 17:00:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:46,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:48,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125744203] [2024-06-27 17:00:48,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125744203] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877376261] [2024-06-27 17:00:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:00:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:48,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-27 17:00:48,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:00:48,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:48,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjunts are in the unsatisfiable core [2024-06-27 17:00:48,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:48,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:00:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:48,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:00:49,695 INFO L378 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 78 treesize of output 70 [2024-06-27 17:00:49,725 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:00:49,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 142 [2024-06-27 17:00:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877376261] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:00:49,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:00:49,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 17:00:49,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890787757] [2024-06-27 17:00:49,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:00:49,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 17:00:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:00:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 17:00:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 17:00:49,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:00:49,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 325 transitions, 4701 flow. Second operand has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:49,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:00:49,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:00:49,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:00:55,810 INFO L124 PetriNetUnfolderBase]: 7576/13394 cut-off events. [2024-06-27 17:00:55,811 INFO L125 PetriNetUnfolderBase]: For 107111/107224 co-relation queries the response was YES. [2024-06-27 17:00:55,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68777 conditions, 13394 events. 7576/13394 cut-off events. For 107111/107224 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 103163 event pairs, 2464 based on Foata normal form. 95/13406 useless extension candidates. Maximal degree in co-relation 68677. Up to 2222 conditions per place. [2024-06-27 17:00:55,955 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 390 selfloop transitions, 155 changer transitions 62/623 dead transitions. [2024-06-27 17:00:55,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 623 transitions, 7582 flow [2024-06-27 17:00:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-27 17:00:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-27 17:00:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 663 transitions. [2024-06-27 17:00:55,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440531561461794 [2024-06-27 17:00:55,958 INFO L175 Difference]: Start difference. First operand has 270 places, 325 transitions, 4701 flow. Second operand 43 states and 663 transitions. [2024-06-27 17:00:55,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 623 transitions, 7582 flow [2024-06-27 17:00:56,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 623 transitions, 7435 flow, removed 21 selfloop flow, removed 17 redundant places. [2024-06-27 17:00:56,645 INFO L231 Difference]: Finished difference. Result has 301 places, 332 transitions, 5046 flow [2024-06-27 17:00:56,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4583, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5046, PETRI_PLACES=301, PETRI_TRANSITIONS=332} [2024-06-27 17:00:56,646 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 263 predicate places. [2024-06-27 17:00:56,646 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 332 transitions, 5046 flow [2024-06-27 17:00:56,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:00:56,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:00:56,646 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:00:56,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-27 17:00:56,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:56,847 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:00:56,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:00:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1787529049, now seen corresponding path program 9 times [2024-06-27 17:00:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:00:56,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040277877] [2024-06-27 17:00:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:00:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:00:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:00:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:57,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:00:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040277877] [2024-06-27 17:00:57,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040277877] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:00:57,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188608657] [2024-06-27 17:00:57,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:00:57,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:00:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:00:57,892 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:00:57,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-27 17:00:57,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-27 17:00:57,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:00:57,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2024-06-27 17:00:57,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:00:58,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:00:58,386 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2024-06-27 17:00:58,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2024-06-27 17:00:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:00:58,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:00,175 INFO L378 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 81 treesize of output 73 [2024-06-27 17:01:00,221 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:01:00,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 160 [2024-06-27 17:01:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:02,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188608657] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:02,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:02,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 17:01:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932650194] [2024-06-27 17:01:02,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:02,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 17:01:02,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 17:01:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 17:01:02,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:01:02,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 332 transitions, 5046 flow. Second operand has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:02,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:02,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:01:02,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:08,843 INFO L124 PetriNetUnfolderBase]: 8298/14593 cut-off events. [2024-06-27 17:01:08,844 INFO L125 PetriNetUnfolderBase]: For 129703/129835 co-relation queries the response was YES. [2024-06-27 17:01:08,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77307 conditions, 14593 events. 8298/14593 cut-off events. For 129703/129835 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 114139 event pairs, 3350 based on Foata normal form. 114/14606 useless extension candidates. Maximal degree in co-relation 77196. Up to 5732 conditions per place. [2024-06-27 17:01:08,961 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 348 selfloop transitions, 113 changer transitions 48/525 dead transitions. [2024-06-27 17:01:08,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 525 transitions, 7398 flow [2024-06-27 17:01:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-27 17:01:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-27 17:01:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 392 transitions. [2024-06-27 17:01:08,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448 [2024-06-27 17:01:08,964 INFO L175 Difference]: Start difference. First operand has 301 places, 332 transitions, 5046 flow. Second operand 25 states and 392 transitions. [2024-06-27 17:01:08,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 525 transitions, 7398 flow [2024-06-27 17:01:09,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 525 transitions, 7091 flow, removed 25 selfloop flow, removed 32 redundant places. [2024-06-27 17:01:09,571 INFO L231 Difference]: Finished difference. Result has 297 places, 357 transitions, 5516 flow [2024-06-27 17:01:09,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5516, PETRI_PLACES=297, PETRI_TRANSITIONS=357} [2024-06-27 17:01:09,572 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 259 predicate places. [2024-06-27 17:01:09,572 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 357 transitions, 5516 flow [2024-06-27 17:01:09,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:09,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:09,572 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:01:09,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:09,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:09,784 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:09,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash -57959319, now seen corresponding path program 10 times [2024-06-27 17:01:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:09,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037032615] [2024-06-27 17:01:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:09,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037032615] [2024-06-27 17:01:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037032615] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063068017] [2024-06-27 17:01:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:01:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:10,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:10,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-27 17:01:10,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:01:10,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:10,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:01:10,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:10,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:01:11,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:11,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:11,963 INFO L378 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 78 treesize of output 70 [2024-06-27 17:01:11,999 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:01:11,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 138 [2024-06-27 17:01:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:12,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063068017] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:12,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:12,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2024-06-27 17:01:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362433802] [2024-06-27 17:01:12,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:12,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-06-27 17:01:12,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-06-27 17:01:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2024-06-27 17:01:12,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:01:12,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 357 transitions, 5516 flow. Second operand has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:12,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:12,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:01:12,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:19,750 INFO L124 PetriNetUnfolderBase]: 9965/17488 cut-off events. [2024-06-27 17:01:19,750 INFO L125 PetriNetUnfolderBase]: For 160116/160271 co-relation queries the response was YES. [2024-06-27 17:01:19,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94992 conditions, 17488 events. 9965/17488 cut-off events. For 160116/160271 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 139594 event pairs, 1866 based on Foata normal form. 128/17479 useless extension candidates. Maximal degree in co-relation 94872. Up to 2370 conditions per place. [2024-06-27 17:01:19,969 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 459 selfloop transitions, 259 changer transitions 66/800 dead transitions. [2024-06-27 17:01:19,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 800 transitions, 10573 flow [2024-06-27 17:01:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-06-27 17:01:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-06-27 17:01:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 806 transitions. [2024-06-27 17:01:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4515406162464986 [2024-06-27 17:01:19,980 INFO L175 Difference]: Start difference. First operand has 297 places, 357 transitions, 5516 flow. Second operand 51 states and 806 transitions. [2024-06-27 17:01:19,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 800 transitions, 10573 flow [2024-06-27 17:01:20,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 800 transitions, 10429 flow, removed 51 selfloop flow, removed 13 redundant places. [2024-06-27 17:01:20,987 INFO L231 Difference]: Finished difference. Result has 351 places, 432 transitions, 7615 flow [2024-06-27 17:01:20,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5412, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=7615, PETRI_PLACES=351, PETRI_TRANSITIONS=432} [2024-06-27 17:01:20,987 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 313 predicate places. [2024-06-27 17:01:20,988 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 432 transitions, 7615 flow [2024-06-27 17:01:20,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.210526315789474) internal successors, (350), 38 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:20,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:20,988 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:01:21,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:21,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-27 17:01:21,192 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:21,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:21,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1260874045, now seen corresponding path program 11 times [2024-06-27 17:01:21,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029871342] [2024-06-27 17:01:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:21,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029871342] [2024-06-27 17:01:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029871342] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977400926] [2024-06-27 17:01:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:01:23,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:23,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:23,033 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:23,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-27 17:01:23,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:01:23,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:23,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:01:23,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:23,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:01:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:23,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:24,386 INFO L378 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 119 treesize of output 107 [2024-06-27 17:01:24,417 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:01:24,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 219 treesize of output 164 [2024-06-27 17:01:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977400926] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:24,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:24,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 17:01:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450160198] [2024-06-27 17:01:24,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:24,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 17:01:24,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:24,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 17:01:24,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 17:01:24,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:01:24,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 432 transitions, 7615 flow. Second operand has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:24,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:24,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:01:24,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:32,528 INFO L124 PetriNetUnfolderBase]: 10596/18521 cut-off events. [2024-06-27 17:01:32,529 INFO L125 PetriNetUnfolderBase]: For 206875/207054 co-relation queries the response was YES. [2024-06-27 17:01:32,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106645 conditions, 18521 events. 10596/18521 cut-off events. For 206875/207054 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 148865 event pairs, 3155 based on Foata normal form. 164/18542 useless extension candidates. Maximal degree in co-relation 106501. Up to 2587 conditions per place. [2024-06-27 17:01:32,711 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 452 selfloop transitions, 251 changer transitions 54/773 dead transitions. [2024-06-27 17:01:32,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 773 transitions, 11507 flow [2024-06-27 17:01:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-06-27 17:01:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-06-27 17:01:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 696 transitions. [2024-06-27 17:01:32,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45194805194805193 [2024-06-27 17:01:32,713 INFO L175 Difference]: Start difference. First operand has 351 places, 432 transitions, 7615 flow. Second operand 44 states and 696 transitions. [2024-06-27 17:01:32,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 773 transitions, 11507 flow [2024-06-27 17:01:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 773 transitions, 10983 flow, removed 167 selfloop flow, removed 22 redundant places. [2024-06-27 17:01:34,104 INFO L231 Difference]: Finished difference. Result has 378 places, 469 transitions, 8469 flow [2024-06-27 17:01:34,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=7180, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8469, PETRI_PLACES=378, PETRI_TRANSITIONS=469} [2024-06-27 17:01:34,105 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 340 predicate places. [2024-06-27 17:01:34,105 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 469 transitions, 8469 flow [2024-06-27 17:01:34,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:34,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:34,106 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:01:34,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-06-27 17:01:34,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-27 17:01:34,307 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:34,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:34,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1794485097, now seen corresponding path program 12 times [2024-06-27 17:01:34,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:34,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640332904] [2024-06-27 17:01:34,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:34,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:35,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640332904] [2024-06-27 17:01:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640332904] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767073124] [2024-06-27 17:01:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:01:35,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:35,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:35,568 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:35,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-27 17:01:35,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:01:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:01:35,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:01:35,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:35,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:01:35,962 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 17:01:35,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2024-06-27 17:01:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:35,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:36,887 INFO L378 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 77 treesize of output 69 [2024-06-27 17:01:36,936 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:01:36,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 147 [2024-06-27 17:01:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:37,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767073124] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:37,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:37,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 17:01:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502207796] [2024-06-27 17:01:37,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:01:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:37,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:01:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:01:37,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:01:37,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 469 transitions, 8469 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:37,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:37,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:01:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:44,693 INFO L124 PetriNetUnfolderBase]: 10713/18710 cut-off events. [2024-06-27 17:01:44,693 INFO L125 PetriNetUnfolderBase]: For 204001/204185 co-relation queries the response was YES. [2024-06-27 17:01:44,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107243 conditions, 18710 events. 10713/18710 cut-off events. For 204001/204185 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 149649 event pairs, 4547 based on Foata normal form. 168/18726 useless extension candidates. Maximal degree in co-relation 107101. Up to 7296 conditions per place. [2024-06-27 17:01:44,901 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 444 selfloop transitions, 133 changer transitions 34/627 dead transitions. [2024-06-27 17:01:44,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 627 transitions, 10593 flow [2024-06-27 17:01:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-27 17:01:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-27 17:01:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 368 transitions. [2024-06-27 17:01:44,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 17:01:44,902 INFO L175 Difference]: Start difference. First operand has 378 places, 469 transitions, 8469 flow. Second operand 23 states and 368 transitions. [2024-06-27 17:01:44,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 627 transitions, 10593 flow [2024-06-27 17:01:46,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 627 transitions, 10254 flow, removed 94 selfloop flow, removed 23 redundant places. [2024-06-27 17:01:46,153 INFO L231 Difference]: Finished difference. Result has 375 places, 477 transitions, 8607 flow [2024-06-27 17:01:46,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8607, PETRI_PLACES=375, PETRI_TRANSITIONS=477} [2024-06-27 17:01:46,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 337 predicate places. [2024-06-27 17:01:46,154 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 477 transitions, 8607 flow [2024-06-27 17:01:46,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:46,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:01:46,154 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:01:46,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-27 17:01:46,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:46,355 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:01:46,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:01:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash -153008733, now seen corresponding path program 13 times [2024-06-27 17:01:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:01:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182370734] [2024-06-27 17:01:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:01:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:01:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:47,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:01:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182370734] [2024-06-27 17:01:47,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182370734] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:01:47,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129797863] [2024-06-27 17:01:47,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-27 17:01:47,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:01:47,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:01:47,594 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:01:47,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-27 17:01:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:01:47,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:01:47,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:01:47,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:01:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:48,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:01:50,836 INFO L378 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 120 treesize of output 108 [2024-06-27 17:01:50,882 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:01:50,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 188 [2024-06-27 17:01:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:01:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129797863] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:01:53,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:01:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 17:01:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004646268] [2024-06-27 17:01:53,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:01:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 17:01:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:01:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 17:01:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 17:01:53,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:01:53,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 477 transitions, 8607 flow. Second operand has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:01:53,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:01:53,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:01:53,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:01:59,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:03,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:08,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:25,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:29,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:33,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:41,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:45,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:49,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:53,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:02:58,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:02,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:07,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:11,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:16,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:22,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:26,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:40,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:44,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:49,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:53,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:03:58,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:02,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:06,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:10,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:14,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:18,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:29,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:33,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:37,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:04:59,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:10,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:14,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:18,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:22,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:27,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:31,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:35,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:39,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:43,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:47,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:05:51,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:01,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:05,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:09,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:13,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:17,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:21,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:26,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:30,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:34,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 17:06:35,013 INFO L124 PetriNetUnfolderBase]: 10883/19037 cut-off events. [2024-06-27 17:06:35,013 INFO L125 PetriNetUnfolderBase]: For 210461/210635 co-relation queries the response was YES. [2024-06-27 17:06:35,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108596 conditions, 19037 events. 10883/19037 cut-off events. For 210461/210635 co-relation queries the response was YES. Maximal size of possible extension queue 913. Compared 152866 event pairs, 4453 based on Foata normal form. 158/19047 useless extension candidates. Maximal degree in co-relation 108456. Up to 7296 conditions per place. [2024-06-27 17:06:35,285 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 461 selfloop transitions, 148 changer transitions 45/670 dead transitions. [2024-06-27 17:06:35,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 670 transitions, 10925 flow [2024-06-27 17:06:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 17:06:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 17:06:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 447 transitions. [2024-06-27 17:06:35,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403940886699507 [2024-06-27 17:06:35,286 INFO L175 Difference]: Start difference. First operand has 375 places, 477 transitions, 8607 flow. Second operand 29 states and 447 transitions. [2024-06-27 17:06:35,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 670 transitions, 10925 flow [2024-06-27 17:06:36,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 670 transitions, 10752 flow, removed 22 selfloop flow, removed 18 redundant places. [2024-06-27 17:06:36,599 INFO L231 Difference]: Finished difference. Result has 388 places, 485 transitions, 8990 flow [2024-06-27 17:06:36,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8459, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8990, PETRI_PLACES=388, PETRI_TRANSITIONS=485} [2024-06-27 17:06:36,600 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 350 predicate places. [2024-06-27 17:06:36,600 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 485 transitions, 8990 flow [2024-06-27 17:06:36,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:06:36,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:36,600 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:06:36,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-27 17:06:36,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:36,809 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:06:36,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2093476885, now seen corresponding path program 14 times [2024-06-27 17:06:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:36,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62276338] [2024-06-27 17:06:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:36,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62276338] [2024-06-27 17:06:38,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62276338] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033282700] [2024-06-27 17:06:38,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 17:06:38,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:38,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:38,374 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:38,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-27 17:06:38,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 17:06:38,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:38,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2024-06-27 17:06:38,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:38,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-06-27 17:06:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:39,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:06:40,189 INFO L378 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 78 treesize of output 70 [2024-06-27 17:06:40,230 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:06:40,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 142 [2024-06-27 17:06:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033282700] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:06:40,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:06:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-06-27 17:06:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361228048] [2024-06-27 17:06:40,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:06:40,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-06-27 17:06:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:06:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-06-27 17:06:40,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2024-06-27 17:06:40,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:06:40,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 485 transitions, 8990 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:06:40,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:06:40,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:06:40,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:06:55,409 INFO L124 PetriNetUnfolderBase]: 11082/19429 cut-off events. [2024-06-27 17:06:55,410 INFO L125 PetriNetUnfolderBase]: For 222978/223151 co-relation queries the response was YES. [2024-06-27 17:06:55,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111518 conditions, 19429 events. 11082/19429 cut-off events. For 222978/223151 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 156813 event pairs, 2341 based on Foata normal form. 158/19439 useless extension candidates. Maximal degree in co-relation 111380. Up to 3082 conditions per place. [2024-06-27 17:06:55,642 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 467 selfloop transitions, 305 changer transitions 51/839 dead transitions. [2024-06-27 17:06:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 839 transitions, 12670 flow [2024-06-27 17:06:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-06-27 17:06:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-06-27 17:06:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 775 transitions. [2024-06-27 17:06:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518950437317784 [2024-06-27 17:06:55,644 INFO L175 Difference]: Start difference. First operand has 388 places, 485 transitions, 8990 flow. Second operand 49 states and 775 transitions. [2024-06-27 17:06:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 839 transitions, 12670 flow [2024-06-27 17:06:57,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 839 transitions, 12516 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-27 17:06:57,098 INFO L231 Difference]: Finished difference. Result has 422 places, 493 transitions, 9623 flow [2024-06-27 17:06:57,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=8864, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9623, PETRI_PLACES=422, PETRI_TRANSITIONS=493} [2024-06-27 17:06:57,099 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 384 predicate places. [2024-06-27 17:06:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 493 transitions, 9623 flow [2024-06-27 17:06:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:06:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:06:57,099 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:06:57,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-06-27 17:06:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:57,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:06:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:06:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1553212583, now seen corresponding path program 15 times [2024-06-27 17:06:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:06:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936903924] [2024-06-27 17:06:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:06:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:06:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:06:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:06:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936903924] [2024-06-27 17:06:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936903924] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:06:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104487480] [2024-06-27 17:06:58,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 17:06:58,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:06:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:06:58,802 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:06:58,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-27 17:06:58,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 17:06:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:06:58,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-27 17:06:58,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:06:58,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:06:59,443 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-06-27 17:06:59,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2024-06-27 17:06:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:06:59,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:00,536 INFO L378 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 116 treesize of output 104 [2024-06-27 17:07:00,590 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-06-27 17:07:00,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 207 treesize of output 167 [2024-06-27 17:07:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:02,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104487480] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:02,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:02,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2024-06-27 17:07:02,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497582060] [2024-06-27 17:07:02,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-06-27 17:07:02,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-06-27 17:07:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2024-06-27 17:07:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:07:02,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 493 transitions, 9623 flow. Second operand has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:02,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:02,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:07:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:10,093 INFO L124 PetriNetUnfolderBase]: 10990/19268 cut-off events. [2024-06-27 17:07:10,093 INFO L125 PetriNetUnfolderBase]: For 243820/244008 co-relation queries the response was YES. [2024-06-27 17:07:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114292 conditions, 19268 events. 10990/19268 cut-off events. For 243820/244008 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 156078 event pairs, 4226 based on Foata normal form. 169/19271 useless extension candidates. Maximal degree in co-relation 114145. Up to 7408 conditions per place. [2024-06-27 17:07:10,373 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 427 selfloop transitions, 157 changer transitions 17/617 dead transitions. [2024-06-27 17:07:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 617 transitions, 11460 flow [2024-06-27 17:07:10,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-27 17:07:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-27 17:07:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 309 transitions. [2024-06-27 17:07:10,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44142857142857145 [2024-06-27 17:07:10,374 INFO L175 Difference]: Start difference. First operand has 422 places, 493 transitions, 9623 flow. Second operand 20 states and 309 transitions. [2024-06-27 17:07:10,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 617 transitions, 11460 flow [2024-06-27 17:07:11,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 617 transitions, 10895 flow, removed 49 selfloop flow, removed 38 redundant places. [2024-06-27 17:07:11,983 INFO L231 Difference]: Finished difference. Result has 401 places, 495 transitions, 9489 flow [2024-06-27 17:07:11,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9088, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9489, PETRI_PLACES=401, PETRI_TRANSITIONS=495} [2024-06-27 17:07:11,984 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 363 predicate places. [2024-06-27 17:07:11,984 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 495 transitions, 9489 flow [2024-06-27 17:07:11,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.4) internal successors, (329), 35 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:11,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:11,984 INFO L208 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, 1, 1, 1, 1] [2024-06-27 17:07:11,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:12,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-06-27 17:07:12,185 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:12,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -317850379, now seen corresponding path program 16 times [2024-06-27 17:07:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:12,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731585886] [2024-06-27 17:07:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:12,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:13,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731585886] [2024-06-27 17:07:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731585886] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942192985] [2024-06-27 17:07:13,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 17:07:13,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:13,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:13,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-27 17:07:13,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 17:07:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:13,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2024-06-27 17:07:13,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:13,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-06-27 17:07:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:14,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:15,568 INFO L378 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 117 treesize of output 105 [2024-06-27 17:07:15,610 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2024-06-27 17:07:15,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 162 [2024-06-27 17:07:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942192985] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:15,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-06-27 17:07:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669968166] [2024-06-27 17:07:15,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:15,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-06-27 17:07:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-06-27 17:07:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2024-06-27 17:07:15,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:07:15,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 495 transitions, 9489 flow. Second operand has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:15,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:15,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:07:15,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:27,303 INFO L124 PetriNetUnfolderBase]: 11242/19782 cut-off events. [2024-06-27 17:07:27,304 INFO L125 PetriNetUnfolderBase]: For 239987/240140 co-relation queries the response was YES. [2024-06-27 17:07:27,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114139 conditions, 19782 events. 11242/19782 cut-off events. For 239987/240140 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 161137 event pairs, 2887 based on Foata normal form. 137/19755 useless extension candidates. Maximal degree in co-relation 114004. Up to 2920 conditions per place. [2024-06-27 17:07:27,817 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 459 selfloop transitions, 241 changer transitions 39/755 dead transitions. [2024-06-27 17:07:27,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 755 transitions, 12425 flow [2024-06-27 17:07:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-27 17:07:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-27 17:07:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 549 transitions. [2024-06-27 17:07:27,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44816326530612244 [2024-06-27 17:07:27,820 INFO L175 Difference]: Start difference. First operand has 401 places, 495 transitions, 9489 flow. Second operand 35 states and 549 transitions. [2024-06-27 17:07:27,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 755 transitions, 12425 flow [2024-06-27 17:07:29,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 755 transitions, 12233 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-27 17:07:29,256 INFO L231 Difference]: Finished difference. Result has 427 places, 501 transitions, 9883 flow [2024-06-27 17:07:29,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9321, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9883, PETRI_PLACES=427, PETRI_TRANSITIONS=501} [2024-06-27 17:07:29,257 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 389 predicate places. [2024-06-27 17:07:29,257 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 501 transitions, 9883 flow [2024-06-27 17:07:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.27027027027027) internal successors, (343), 37 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:29,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:29,257 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:29,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:29,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-06-27 17:07:29,463 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:29,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2083819997, now seen corresponding path program 17 times [2024-06-27 17:07:29,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:29,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792449579] [2024-06-27 17:07:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:31,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:31,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792449579] [2024-06-27 17:07:31,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792449579] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:31,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895432599] [2024-06-27 17:07:31,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 17:07:31,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:31,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:31,942 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:31,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-27 17:07:32,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-27 17:07:32,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:32,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-27 17:07:32,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 17:07:32,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:32,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:07:32,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2024-06-27 17:07:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:07:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895432599] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:34,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:34,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2024-06-27 17:07:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123282738] [2024-06-27 17:07:34,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:34,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 17:07:34,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 17:07:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2024-06-27 17:07:34,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:07:34,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 501 transitions, 9883 flow. Second operand has 29 states, 29 states have (on average 9.689655172413794) internal successors, (281), 29 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:34,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:34,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:07:34,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:07:41,852 INFO L124 PetriNetUnfolderBase]: 15491/26794 cut-off events. [2024-06-27 17:07:41,852 INFO L125 PetriNetUnfolderBase]: For 351413/351694 co-relation queries the response was YES. [2024-06-27 17:07:42,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157833 conditions, 26794 events. 15491/26794 cut-off events. For 351413/351694 co-relation queries the response was YES. Maximal size of possible extension queue 1228. Compared 221094 event pairs, 4472 based on Foata normal form. 256/26805 useless extension candidates. Maximal degree in co-relation 157686. Up to 6208 conditions per place. [2024-06-27 17:07:42,605 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 471 selfloop transitions, 321 changer transitions 39/847 dead transitions. [2024-06-27 17:07:42,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 847 transitions, 15808 flow [2024-06-27 17:07:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-06-27 17:07:42,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-06-27 17:07:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 417 transitions. [2024-06-27 17:07:42,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582417582417582 [2024-06-27 17:07:42,607 INFO L175 Difference]: Start difference. First operand has 427 places, 501 transitions, 9883 flow. Second operand 26 states and 417 transitions. [2024-06-27 17:07:42,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 847 transitions, 15808 flow [2024-06-27 17:07:45,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 847 transitions, 15216 flow, removed 14 selfloop flow, removed 26 redundant places. [2024-06-27 17:07:45,276 INFO L231 Difference]: Finished difference. Result has 434 places, 633 transitions, 13034 flow [2024-06-27 17:07:45,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9465, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13034, PETRI_PLACES=434, PETRI_TRANSITIONS=633} [2024-06-27 17:07:45,277 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 396 predicate places. [2024-06-27 17:07:45,277 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 633 transitions, 13034 flow [2024-06-27 17:07:45,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.689655172413794) internal successors, (281), 29 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:45,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:07:45,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:07:45,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-27 17:07:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-06-27 17:07:45,477 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 17:07:45,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:07:45,478 INFO L85 PathProgramCache]: Analyzing trace with hash -209853911, now seen corresponding path program 18 times [2024-06-27 17:07:45,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:07:45,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533386270] [2024-06-27 17:07:45,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:07:45,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:07:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:07:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:07:48,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:07:48,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533386270] [2024-06-27 17:07:48,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533386270] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:07:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588519551] [2024-06-27 17:07:48,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 17:07:48,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:07:48,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:07:48,073 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:07:48,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-27 17:07:48,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-27 17:07:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 17:07:48,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-27 17:07:48,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:07:48,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:07:48,473 INFO L378 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 108 treesize of output 40 [2024-06-27 17:07:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 17:07:48,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:07:48,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 17:07:48,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 68 [2024-06-27 17:07:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:07:50,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588519551] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:07:50,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:07:50,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 28 [2024-06-27 17:07:50,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545843973] [2024-06-27 17:07:50,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:07:50,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-06-27 17:07:50,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:07:50,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-06-27 17:07:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-06-27 17:07:50,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-06-27 17:07:50,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 633 transitions, 13034 flow. Second operand has 29 states, 29 states have (on average 9.689655172413794) internal successors, (281), 29 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:07:50,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:07:50,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-06-27 17:07:50,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand