./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-counter-fun.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-counter-fun.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:03:13,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:03:13,725 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:03:13,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:03:13,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:03:13,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:03:13,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:03:13,756 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:03:13,756 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:03:13,760 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:03:13,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:03:13,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:03:13,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:03:13,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:03:13,762 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:03:13,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:03:13,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:03:13,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:03:13,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:03:13,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:03:13,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:03:13,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:03:13,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:03:13,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:03:13,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:03:13,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:03:13,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:03:13,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:03:13,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:03:13,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:03:13,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:03:13,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:03:13,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:03:13,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:03:13,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:03:13,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:03:13,767 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:03:13,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:03:13,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:03:13,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:03:13,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:03:13,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:03:13,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:03:13,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:03:14,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:03:14,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:03:14,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:03:14,067 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:03:14,068 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:03:14,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-counter-fun.wvr.yml/witness.yml [2024-01-31 17:03:14,214 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:03:14,214 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:03:14,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-01-31 17:03:15,275 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:03:15,456 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:03:15,456 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2024-01-31 17:03:15,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06673c2f8/a2920749c23747cea419414831c5a712/FLAGffa138d73 [2024-01-31 17:03:15,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06673c2f8/a2920749c23747cea419414831c5a712 [2024-01-31 17:03:15,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:03:15,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:03:15,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:03:15,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:03:15,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:03:15,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:14" (1/2) ... [2024-01-31 17:03:15,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20937c32 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:03:15, skipping insertion in model container [2024-01-31 17:03:15,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:14" (1/2) ... [2024-01-31 17:03:15,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1eab7961 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:03:15, skipping insertion in model container [2024-01-31 17:03:15,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:03:15" (2/2) ... [2024-01-31 17:03:15,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20937c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15, skipping insertion in model container [2024-01-31 17:03:15,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:03:15" (2/2) ... [2024-01-31 17:03:15,493 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:03:15,534 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:03:15,553 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:03:15,683 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-01-31 17:03:15,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:03:15,702 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:03:15,719 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-01-31 17:03:15,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:03:15,733 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:03:15,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15 WrapperNode [2024-01-31 17:03:15,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:03:15,735 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:03:15,735 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:03:15,735 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:03:15,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,746 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,772 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 203 [2024-01-31 17:03:15,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:03:15,774 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:03:15,774 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:03:15,774 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:03:15,782 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,785 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,856 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 2, 12, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 4 writes are split as follows [0, 1, 2, 1]. [2024-01-31 17:03:15,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,862 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,865 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:03:15,881 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:03:15,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:03:15,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:03:15,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (1/1) ... [2024-01-31 17:03:15,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:03:15,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:15,918 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) [2024-01-31 17:03:15,920 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 [2024-01-31 17:03:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:03:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:03:15,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:03:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:03:15,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:03:15,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:03:15,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:03:15,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:03:15,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:03:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:03:15,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:03:15,950 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:03:16,051 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:03:16,053 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:03:16,295 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:03:16,298 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:03:16,526 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:03:16,526 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-31 17:03:16,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:03:16 BoogieIcfgContainer [2024-01-31 17:03:16,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:03:16,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:03:16,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:03:16,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:03:16,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:03:14" (1/4) ... [2024-01-31 17:03:16,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abefdb4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:03:16, skipping insertion in model container [2024-01-31 17:03:16,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:03:15" (2/4) ... [2024-01-31 17:03:16,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abefdb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:03:16, skipping insertion in model container [2024-01-31 17:03:16,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:03:15" (3/4) ... [2024-01-31 17:03:16,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abefdb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:03:16, skipping insertion in model container [2024-01-31 17:03:16,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:03:16" (4/4) ... [2024-01-31 17:03:16,536 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-01-31 17:03:16,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:03:16,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:03:16,550 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:03:16,594 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:03:16,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-01-31 17:03:16,660 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-01-31 17:03:16,660 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:03:16,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-31 17:03:16,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-01-31 17:03:16,667 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2024-01-31 17:03:16,679 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:03:16,688 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@4b68a5f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:03:16,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:03:16,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:03:16,698 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2024-01-31 17:03:16,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:03:16,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:16,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:16,699 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:16,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 344802912, now seen corresponding path program 1 times [2024-01-31 17:03:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:16,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519184245] [2024-01-31 17:03:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:16,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:16,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:16,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519184245] [2024-01-31 17:03:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519184245] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:16,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:16,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:03:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727329584] [2024-01-31 17:03:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:03:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:03:17,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:03:17,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 17:03:17,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:17,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 17:03:17,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:17,139 INFO L124 PetriNetUnfolderBase]: 101/199 cut-off events. [2024-01-31 17:03:17,139 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-31 17:03:17,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 199 events. 101/199 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 24 based on Foata normal form. 1/197 useless extension candidates. Maximal degree in co-relation 317. Up to 122 conditions per place. [2024-01-31 17:03:17,142 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 29 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2024-01-31 17:03:17,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 159 flow [2024-01-31 17:03:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:03:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:03:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-01-31 17:03:17,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-01-31 17:03:17,153 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 49 transitions. [2024-01-31 17:03:17,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 159 flow [2024-01-31 17:03:17,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 36 transitions, 145 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:17,156 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 71 flow [2024-01-31 17:03:17,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-01-31 17:03:17,160 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-01-31 17:03:17,161 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 71 flow [2024-01-31 17:03:17,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:17,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:03:17,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:17,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1629858922, now seen corresponding path program 1 times [2024-01-31 17:03:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:17,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146470836] [2024-01-31 17:03:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146470836] [2024-01-31 17:03:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146470836] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:17,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:17,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731321972] [2024-01-31 17:03:17,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:17,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:17,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:17,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:17,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:17,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:17,502 INFO L124 PetriNetUnfolderBase]: 195/348 cut-off events. [2024-01-31 17:03:17,502 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-01-31 17:03:17,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 348 events. 195/348 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1373 event pairs, 66 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 210. Up to 201 conditions per place. [2024-01-31 17:03:17,509 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 40 selfloop transitions, 9 changer transitions 1/52 dead transitions. [2024-01-31 17:03:17,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 52 transitions, 244 flow [2024-01-31 17:03:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:17,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-31 17:03:17,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-31 17:03:17,513 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 71 flow. Second operand 5 states and 66 transitions. [2024-01-31 17:03:17,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 52 transitions, 244 flow [2024-01-31 17:03:17,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:17,520 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 126 flow [2024-01-31 17:03:17,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2024-01-31 17:03:17,521 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2024-01-31 17:03:17,524 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 126 flow [2024-01-31 17:03:17,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:17,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:17,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:03:17,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:17,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:17,526 INFO L85 PathProgramCache]: Analyzing trace with hash -854956140, now seen corresponding path program 2 times [2024-01-31 17:03:17,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:17,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222734072] [2024-01-31 17:03:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:17,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222734072] [2024-01-31 17:03:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222734072] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918932467] [2024-01-31 17:03:17,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:17,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:17,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:17,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:17,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:17,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:17,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:17,867 INFO L124 PetriNetUnfolderBase]: 242/451 cut-off events. [2024-01-31 17:03:17,868 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-01-31 17:03:17,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1257 conditions, 451 events. 242/451 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1976 event pairs, 27 based on Foata normal form. 14/463 useless extension candidates. Maximal degree in co-relation 599. Up to 130 conditions per place. [2024-01-31 17:03:17,870 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 65 selfloop transitions, 12 changer transitions 1/80 dead transitions. [2024-01-31 17:03:17,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 80 transitions, 449 flow [2024-01-31 17:03:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:03:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:03:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-01-31 17:03:17,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-01-31 17:03:17,874 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 126 flow. Second operand 7 states and 95 transitions. [2024-01-31 17:03:17,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 80 transitions, 449 flow [2024-01-31 17:03:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 449 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:17,879 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 214 flow [2024-01-31 17:03:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2024-01-31 17:03:17,880 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-01-31 17:03:17,880 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 214 flow [2024-01-31 17:03:17,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:17,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:17,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:03:17,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:17,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 449448984, now seen corresponding path program 3 times [2024-01-31 17:03:17,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:17,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325948224] [2024-01-31 17:03:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325948224] [2024-01-31 17:03:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325948224] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:17,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233066318] [2024-01-31 17:03:17,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:17,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:17,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:17,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:17,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:17,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:17,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:17,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,135 INFO L124 PetriNetUnfolderBase]: 308/569 cut-off events. [2024-01-31 17:03:18,136 INFO L125 PetriNetUnfolderBase]: For 894/894 co-relation queries the response was YES. [2024-01-31 17:03:18,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 569 events. 308/569 cut-off events. For 894/894 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2569 event pairs, 97 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 1429. Up to 279 conditions per place. [2024-01-31 17:03:18,139 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 10 changer transitions 4/71 dead transitions. [2024-01-31 17:03:18,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 71 transitions, 509 flow [2024-01-31 17:03:18,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-31 17:03:18,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-31 17:03:18,140 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 214 flow. Second operand 5 states and 66 transitions. [2024-01-31 17:03:18,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 71 transitions, 509 flow [2024-01-31 17:03:18,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 71 transitions, 497 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:18,143 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 261 flow [2024-01-31 17:03:18,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-01-31 17:03:18,144 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2024-01-31 17:03:18,144 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 261 flow [2024-01-31 17:03:18,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:18,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:18,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:03:18,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:18,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1882494625, now seen corresponding path program 1 times [2024-01-31 17:03:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690253377] [2024-01-31 17:03:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690253377] [2024-01-31 17:03:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690253377] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:18,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:18,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326655400] [2024-01-31 17:03:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:18,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:18,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:18,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:18,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:18,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,311 INFO L124 PetriNetUnfolderBase]: 327/597 cut-off events. [2024-01-31 17:03:18,312 INFO L125 PetriNetUnfolderBase]: For 1330/1334 co-relation queries the response was YES. [2024-01-31 17:03:18,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2174 conditions, 597 events. 327/597 cut-off events. For 1330/1334 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2708 event pairs, 116 based on Foata normal form. 4/595 useless extension candidates. Maximal degree in co-relation 1918. Up to 314 conditions per place. [2024-01-31 17:03:18,316 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 54 selfloop transitions, 7 changer transitions 8/72 dead transitions. [2024-01-31 17:03:18,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 545 flow [2024-01-31 17:03:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-01-31 17:03:18,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-01-31 17:03:18,317 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 261 flow. Second operand 5 states and 70 transitions. [2024-01-31 17:03:18,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 545 flow [2024-01-31 17:03:18,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 506 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-01-31 17:03:18,321 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 263 flow [2024-01-31 17:03:18,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-01-31 17:03:18,322 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2024-01-31 17:03:18,322 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 263 flow [2024-01-31 17:03:18,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:18,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:18,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:03:18,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:18,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash 763445254, now seen corresponding path program 4 times [2024-01-31 17:03:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:18,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585235992] [2024-01-31 17:03:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:18,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:18,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585235992] [2024-01-31 17:03:18,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585235992] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:18,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:18,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:18,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785572898] [2024-01-31 17:03:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:18,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:18,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:18,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:18,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:18,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:18,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:18,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,540 INFO L124 PetriNetUnfolderBase]: 400/705 cut-off events. [2024-01-31 17:03:18,541 INFO L125 PetriNetUnfolderBase]: For 1808/1808 co-relation queries the response was YES. [2024-01-31 17:03:18,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 705 events. 400/705 cut-off events. For 1808/1808 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3022 event pairs, 126 based on Foata normal form. 18/721 useless extension candidates. Maximal degree in co-relation 1845. Up to 395 conditions per place. [2024-01-31 17:03:18,546 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-01-31 17:03:18,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 650 flow [2024-01-31 17:03:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:03:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:03:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-01-31 17:03:18,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-01-31 17:03:18,549 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 263 flow. Second operand 6 states and 77 transitions. [2024-01-31 17:03:18,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 650 flow [2024-01-31 17:03:18,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 612 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:18,554 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 384 flow [2024-01-31 17:03:18,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-01-31 17:03:18,557 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 29 predicate places. [2024-01-31 17:03:18,557 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 384 flow [2024-01-31 17:03:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:03:18,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:18,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1008840197, now seen corresponding path program 2 times [2024-01-31 17:03:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:18,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077772998] [2024-01-31 17:03:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:18,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077772998] [2024-01-31 17:03:18,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077772998] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:18,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:18,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:18,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038668655] [2024-01-31 17:03:18,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:18,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:18,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:18,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:18,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:18,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:18,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,790 INFO L124 PetriNetUnfolderBase]: 377/689 cut-off events. [2024-01-31 17:03:18,791 INFO L125 PetriNetUnfolderBase]: For 2020/2032 co-relation queries the response was YES. [2024-01-31 17:03:18,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 689 events. 377/689 cut-off events. For 2020/2032 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3245 event pairs, 32 based on Foata normal form. 8/690 useless extension candidates. Maximal degree in co-relation 1776. Up to 228 conditions per place. [2024-01-31 17:03:18,795 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 71 selfloop transitions, 20 changer transitions 1/96 dead transitions. [2024-01-31 17:03:18,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 800 flow [2024-01-31 17:03:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:03:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:03:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-01-31 17:03:18,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:03:18,796 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 384 flow. Second operand 7 states and 90 transitions. [2024-01-31 17:03:18,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 800 flow [2024-01-31 17:03:18,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 769 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:18,801 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 477 flow [2024-01-31 17:03:18,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=477, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-01-31 17:03:18,802 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-01-31 17:03:18,803 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 477 flow [2024-01-31 17:03:18,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:18,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:18,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:03:18,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:18,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 554147766, now seen corresponding path program 5 times [2024-01-31 17:03:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:18,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227860003] [2024-01-31 17:03:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:18,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227860003] [2024-01-31 17:03:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227860003] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:18,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:18,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890530981] [2024-01-31 17:03:18,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:18,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:18,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:18,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 477 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:18,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:18,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:18,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,994 INFO L124 PetriNetUnfolderBase]: 444/781 cut-off events. [2024-01-31 17:03:18,994 INFO L125 PetriNetUnfolderBase]: For 3084/3084 co-relation queries the response was YES. [2024-01-31 17:03:18,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 781 events. 444/781 cut-off events. For 3084/3084 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3434 event pairs, 189 based on Foata normal form. 8/787 useless extension candidates. Maximal degree in co-relation 2719. Up to 494 conditions per place. [2024-01-31 17:03:18,999 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 20 changer transitions 1/77 dead transitions. [2024-01-31 17:03:18,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 733 flow [2024-01-31 17:03:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-01-31 17:03:19,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-01-31 17:03:19,000 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 477 flow. Second operand 5 states and 66 transitions. [2024-01-31 17:03:19,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 733 flow [2024-01-31 17:03:19,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 714 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:19,006 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 512 flow [2024-01-31 17:03:19,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-01-31 17:03:19,008 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2024-01-31 17:03:19,008 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 512 flow [2024-01-31 17:03:19,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 17:03:19,008 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash 357640129, now seen corresponding path program 3 times [2024-01-31 17:03:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584779950] [2024-01-31 17:03:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584779950] [2024-01-31 17:03:19,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584779950] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:19,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085946354] [2024-01-31 17:03:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:19,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:19,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:19,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:19,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:19,220 INFO L124 PetriNetUnfolderBase]: 455/798 cut-off events. [2024-01-31 17:03:19,220 INFO L125 PetriNetUnfolderBase]: For 3581/3581 co-relation queries the response was YES. [2024-01-31 17:03:19,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3468 conditions, 798 events. 455/798 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3526 event pairs, 175 based on Foata normal form. 8/804 useless extension candidates. Maximal degree in co-relation 2941. Up to 494 conditions per place. [2024-01-31 17:03:19,225 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 64 selfloop transitions, 22 changer transitions 0/87 dead transitions. [2024-01-31 17:03:19,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 839 flow [2024-01-31 17:03:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:03:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:03:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-01-31 17:03:19,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-31 17:03:19,227 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 512 flow. Second operand 6 states and 74 transitions. [2024-01-31 17:03:19,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 839 flow [2024-01-31 17:03:19,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 793 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:19,233 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 552 flow [2024-01-31 17:03:19,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=552, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2024-01-31 17:03:19,234 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 44 predicate places. [2024-01-31 17:03:19,234 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 552 flow [2024-01-31 17:03:19,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 17:03:19,235 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:19,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1419093412, now seen corresponding path program 6 times [2024-01-31 17:03:19,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476925392] [2024-01-31 17:03:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476925392] [2024-01-31 17:03:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476925392] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250026357] [2024-01-31 17:03:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:19,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:19,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:19,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:19,476 INFO L124 PetriNetUnfolderBase]: 501/884 cut-off events. [2024-01-31 17:03:19,476 INFO L125 PetriNetUnfolderBase]: For 3796/3796 co-relation queries the response was YES. [2024-01-31 17:03:19,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3785 conditions, 884 events. 501/884 cut-off events. For 3796/3796 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4087 event pairs, 157 based on Foata normal form. 10/892 useless extension candidates. Maximal degree in co-relation 3081. Up to 470 conditions per place. [2024-01-31 17:03:19,484 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 64 selfloop transitions, 23 changer transitions 1/89 dead transitions. [2024-01-31 17:03:19,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 877 flow [2024-01-31 17:03:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:03:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:03:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-01-31 17:03:19,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-01-31 17:03:19,485 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 552 flow. Second operand 6 states and 77 transitions. [2024-01-31 17:03:19,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 877 flow [2024-01-31 17:03:19,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 837 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:19,491 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 576 flow [2024-01-31 17:03:19,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2024-01-31 17:03:19,492 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-31 17:03:19,492 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 576 flow [2024-01-31 17:03:19,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 17:03:19,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:19,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash 792013491, now seen corresponding path program 4 times [2024-01-31 17:03:19,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346096305] [2024-01-31 17:03:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346096305] [2024-01-31 17:03:19,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346096305] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:19,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651880367] [2024-01-31 17:03:19,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:19,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:19,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 576 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:19,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:19,662 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2024-01-31 17:03:19,663 INFO L125 PetriNetUnfolderBase]: For 3281/3289 co-relation queries the response was YES. [2024-01-31 17:03:19,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 762 events. 410/762 cut-off events. For 3281/3289 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3794 event pairs, 141 based on Foata normal form. 4/753 useless extension candidates. Maximal degree in co-relation 2583. Up to 484 conditions per place. [2024-01-31 17:03:19,667 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 52 selfloop transitions, 17 changer transitions 4/79 dead transitions. [2024-01-31 17:03:19,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 799 flow [2024-01-31 17:03:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-01-31 17:03:19,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-01-31 17:03:19,669 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 576 flow. Second operand 5 states and 64 transitions. [2024-01-31 17:03:19,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 799 flow [2024-01-31 17:03:19,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 741 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 17:03:19,675 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 542 flow [2024-01-31 17:03:19,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2024-01-31 17:03:19,676 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2024-01-31 17:03:19,676 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 542 flow [2024-01-31 17:03:19,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 17:03:19,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:19,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1232387926, now seen corresponding path program 7 times [2024-01-31 17:03:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436172487] [2024-01-31 17:03:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:19,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436172487] [2024-01-31 17:03:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436172487] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:19,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540279977] [2024-01-31 17:03:19,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:19,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:19,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:19,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:19,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:19,857 INFO L124 PetriNetUnfolderBase]: 401/744 cut-off events. [2024-01-31 17:03:19,857 INFO L125 PetriNetUnfolderBase]: For 3318/3322 co-relation queries the response was YES. [2024-01-31 17:03:19,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3138 conditions, 744 events. 401/744 cut-off events. For 3318/3322 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3599 event pairs, 120 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 2480. Up to 379 conditions per place. [2024-01-31 17:03:19,862 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 50 selfloop transitions, 17 changer transitions 3/77 dead transitions. [2024-01-31 17:03:19,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 772 flow [2024-01-31 17:03:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-01-31 17:03:19,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-31 17:03:19,864 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 542 flow. Second operand 5 states and 63 transitions. [2024-01-31 17:03:19,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 772 flow [2024-01-31 17:03:19,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 734 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:19,870 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 535 flow [2024-01-31 17:03:19,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-01-31 17:03:19,871 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2024-01-31 17:03:19,871 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 535 flow [2024-01-31 17:03:19,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:19,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:19,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 17:03:19,872 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:19,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash -388448233, now seen corresponding path program 5 times [2024-01-31 17:03:19,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:19,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105167097] [2024-01-31 17:03:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:19,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105167097] [2024-01-31 17:03:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105167097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:19,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:03:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981919197] [2024-01-31 17:03:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:19,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:03:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:19,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:03:19,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:03:19,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:19,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 535 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:19,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:19,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:19,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:20,069 INFO L124 PetriNetUnfolderBase]: 524/913 cut-off events. [2024-01-31 17:03:20,070 INFO L125 PetriNetUnfolderBase]: For 3979/3979 co-relation queries the response was YES. [2024-01-31 17:03:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 913 events. 524/913 cut-off events. For 3979/3979 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4153 event pairs, 158 based on Foata normal form. 8/919 useless extension candidates. Maximal degree in co-relation 3109. Up to 416 conditions per place. [2024-01-31 17:03:20,075 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 63 selfloop transitions, 23 changer transitions 1/88 dead transitions. [2024-01-31 17:03:20,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 880 flow [2024-01-31 17:03:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:03:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:03:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-01-31 17:03:20,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-01-31 17:03:20,076 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 535 flow. Second operand 6 states and 74 transitions. [2024-01-31 17:03:20,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 880 flow [2024-01-31 17:03:20,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 832 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:20,083 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 586 flow [2024-01-31 17:03:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-01-31 17:03:20,083 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-01-31 17:03:20,083 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 586 flow [2024-01-31 17:03:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:20,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:20,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-31 17:03:20,084 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:20,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -107704447, now seen corresponding path program 6 times [2024-01-31 17:03:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58785838] [2024-01-31 17:03:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:20,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58785838] [2024-01-31 17:03:20,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58785838] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:20,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:20,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:03:20,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574227281] [2024-01-31 17:03:20,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:20,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:03:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:03:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:03:20,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-01-31 17:03:20,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 586 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:20,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-01-31 17:03:20,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:20,251 INFO L124 PetriNetUnfolderBase]: 410/740 cut-off events. [2024-01-31 17:03:20,252 INFO L125 PetriNetUnfolderBase]: For 3528/3529 co-relation queries the response was YES. [2024-01-31 17:03:20,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 740 events. 410/740 cut-off events. For 3528/3529 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3463 event pairs, 139 based on Foata normal form. 4/737 useless extension candidates. Maximal degree in co-relation 2388. Up to 385 conditions per place. [2024-01-31 17:03:20,256 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 17 changer transitions 4/78 dead transitions. [2024-01-31 17:03:20,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 78 transitions, 789 flow [2024-01-31 17:03:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-01-31 17:03:20,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-01-31 17:03:20,257 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 586 flow. Second operand 5 states and 63 transitions. [2024-01-31 17:03:20,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 78 transitions, 789 flow [2024-01-31 17:03:20,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 748 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:20,271 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 566 flow [2024-01-31 17:03:20,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=566, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-01-31 17:03:20,272 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2024-01-31 17:03:20,272 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 566 flow [2024-01-31 17:03:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:20,273 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] [2024-01-31 17:03:20,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 17:03:20,273 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:20,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:20,273 INFO L85 PathProgramCache]: Analyzing trace with hash -345317257, now seen corresponding path program 1 times [2024-01-31 17:03:20,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:20,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228074398] [2024-01-31 17:03:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:20,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228074398] [2024-01-31 17:03:20,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228074398] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:20,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:20,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:03:20,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643136259] [2024-01-31 17:03:20,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:20,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:20,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 17:03:20,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 566 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:20,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 17:03:20,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:20,439 INFO L124 PetriNetUnfolderBase]: 340/688 cut-off events. [2024-01-31 17:03:20,439 INFO L125 PetriNetUnfolderBase]: For 3555/3564 co-relation queries the response was YES. [2024-01-31 17:03:20,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2909 conditions, 688 events. 340/688 cut-off events. For 3555/3564 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3505 event pairs, 170 based on Foata normal form. 25/704 useless extension candidates. Maximal degree in co-relation 2289. Up to 546 conditions per place. [2024-01-31 17:03:20,443 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 46 selfloop transitions, 2 changer transitions 15/76 dead transitions. [2024-01-31 17:03:20,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 809 flow [2024-01-31 17:03:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:03:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:03:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-01-31 17:03:20,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-31 17:03:20,444 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 566 flow. Second operand 5 states and 60 transitions. [2024-01-31 17:03:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 809 flow [2024-01-31 17:03:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 763 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:20,449 INFO L231 Difference]: Finished difference. Result has 76 places, 61 transitions, 550 flow [2024-01-31 17:03:20,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=550, PETRI_PLACES=76, PETRI_TRANSITIONS=61} [2024-01-31 17:03:20,450 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-01-31 17:03:20,450 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 61 transitions, 550 flow [2024-01-31 17:03:20,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:20,451 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] [2024-01-31 17:03:20,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-01-31 17:03:20,451 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:20,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1787390974, now seen corresponding path program 1 times [2024-01-31 17:03:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920460282] [2024-01-31 17:03:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:20,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920460282] [2024-01-31 17:03:20,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920460282] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:03:20,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:03:20,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:03:20,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116773724] [2024-01-31 17:03:20,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:03:20,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:03:20,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:20,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:03:20,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:03:20,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 17:03:20,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 61 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:20,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 17:03:20,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:20,611 INFO L124 PetriNetUnfolderBase]: 338/683 cut-off events. [2024-01-31 17:03:20,612 INFO L125 PetriNetUnfolderBase]: For 3072/3091 co-relation queries the response was YES. [2024-01-31 17:03:20,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 683 events. 338/683 cut-off events. For 3072/3091 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3494 event pairs, 170 based on Foata normal form. 25/701 useless extension candidates. Maximal degree in co-relation 2781. Up to 547 conditions per place. [2024-01-31 17:03:20,616 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 47 selfloop transitions, 2 changer transitions 11/73 dead transitions. [2024-01-31 17:03:20,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 773 flow [2024-01-31 17:03:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:03:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:03:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-01-31 17:03:20,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-01-31 17:03:20,618 INFO L175 Difference]: Start difference. First operand has 76 places, 61 transitions, 550 flow. Second operand 4 states and 51 transitions. [2024-01-31 17:03:20,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 773 flow [2024-01-31 17:03:20,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 757 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:20,623 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 554 flow [2024-01-31 17:03:20,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-01-31 17:03:20,624 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2024-01-31 17:03:20,624 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 554 flow [2024-01-31 17:03:20,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:20,625 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] [2024-01-31 17:03:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-01-31 17:03:20,626 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:20,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash 15225383, now seen corresponding path program 1 times [2024-01-31 17:03:20,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:20,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164515274] [2024-01-31 17:03:20,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:20,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164515274] [2024-01-31 17:03:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164515274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:20,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776154294] [2024-01-31 17:03:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:20,825 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) [2024-01-31 17:03:20,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:03:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:20,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:03:20,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:21,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:21,077 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 36 treesize of output 12 [2024-01-31 17:03:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:21,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776154294] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:21,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:21,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-01-31 17:03:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60123786] [2024-01-31 17:03:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:21,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:03:21,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:03:21,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:03:21,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 17:03:21,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 554 flow. Second operand has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:21,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:21,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 17:03:21,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:21,431 INFO L124 PetriNetUnfolderBase]: 1017/1955 cut-off events. [2024-01-31 17:03:21,431 INFO L125 PetriNetUnfolderBase]: For 7882/7933 co-relation queries the response was YES. [2024-01-31 17:03:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7656 conditions, 1955 events. 1017/1955 cut-off events. For 7882/7933 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 12005 event pairs, 149 based on Foata normal form. 18/1966 useless extension candidates. Maximal degree in co-relation 5625. Up to 526 conditions per place. [2024-01-31 17:03:21,454 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 158 selfloop transitions, 14 changer transitions 5/190 dead transitions. [2024-01-31 17:03:21,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 190 transitions, 2022 flow [2024-01-31 17:03:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:03:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:03:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-01-31 17:03:21,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349794238683128 [2024-01-31 17:03:21,455 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 554 flow. Second operand 9 states and 130 transitions. [2024-01-31 17:03:21,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 190 transitions, 2022 flow [2024-01-31 17:03:21,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 190 transitions, 2006 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-01-31 17:03:21,465 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 663 flow [2024-01-31 17:03:21,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=663, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2024-01-31 17:03:21,466 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2024-01-31 17:03:21,466 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 663 flow [2024-01-31 17:03:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.0) internal successors, (88), 11 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:21,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:21,466 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] [2024-01-31 17:03:21,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:21,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:03:21,674 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:21,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:21,675 INFO L85 PathProgramCache]: Analyzing trace with hash -354859999, now seen corresponding path program 2 times [2024-01-31 17:03:21,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:21,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378576438] [2024-01-31 17:03:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378576438] [2024-01-31 17:03:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378576438] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458746070] [2024-01-31 17:03:21,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:21,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:21,844 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) [2024-01-31 17:03:21,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:03:21,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:21,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:03:21,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:03:21,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:22,004 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 36 treesize of output 12 [2024-01-31 17:03:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:03:22,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458746070] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:22,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:22,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-01-31 17:03:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147990927] [2024-01-31 17:03:22,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:03:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:03:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:03:22,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-01-31 17:03:22,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 75 transitions, 663 flow. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:22,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:22,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-01-31 17:03:22,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:22,614 INFO L124 PetriNetUnfolderBase]: 2525/4865 cut-off events. [2024-01-31 17:03:22,615 INFO L125 PetriNetUnfolderBase]: For 21543/21629 co-relation queries the response was YES. [2024-01-31 17:03:22,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20115 conditions, 4865 events. 2525/4865 cut-off events. For 21543/21629 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35792 event pairs, 483 based on Foata normal form. 63/4914 useless extension candidates. Maximal degree in co-relation 14663. Up to 1603 conditions per place. [2024-01-31 17:03:22,637 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 165 selfloop transitions, 23 changer transitions 10/211 dead transitions. [2024-01-31 17:03:22,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 211 transitions, 2278 flow [2024-01-31 17:03:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:03:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:03:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-01-31 17:03:22,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2024-01-31 17:03:22,639 INFO L175 Difference]: Start difference. First operand has 85 places, 75 transitions, 663 flow. Second operand 8 states and 119 transitions. [2024-01-31 17:03:22,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 211 transitions, 2278 flow [2024-01-31 17:03:22,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 211 transitions, 2230 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:22,663 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 851 flow [2024-01-31 17:03:22,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-01-31 17:03:22,664 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2024-01-31 17:03:22,664 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 851 flow [2024-01-31 17:03:22,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:22,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:22,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:22,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:22,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:03:22,893 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:22,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1670425868, now seen corresponding path program 3 times [2024-01-31 17:03:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:22,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671413263] [2024-01-31 17:03:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:22,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:22,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:22,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671413263] [2024-01-31 17:03:22,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671413263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:22,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909509282] [2024-01-31 17:03:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:22,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:22,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:22,977 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) [2024-01-31 17:03:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:03:23,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:03:23,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:23,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:23,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:23,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:23,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909509282] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:23,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:23,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:03:23,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029793368] [2024-01-31 17:03:23,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:23,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:03:23,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:23,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:03:23,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:03:23,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:23,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 851 flow. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:23,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:23,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:23,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:24,444 INFO L124 PetriNetUnfolderBase]: 5060/8499 cut-off events. [2024-01-31 17:03:24,445 INFO L125 PetriNetUnfolderBase]: For 31142/31142 co-relation queries the response was YES. [2024-01-31 17:03:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34778 conditions, 8499 events. 5060/8499 cut-off events. For 31142/31142 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55968 event pairs, 260 based on Foata normal form. 260/8759 useless extension candidates. Maximal degree in co-relation 28646. Up to 1535 conditions per place. [2024-01-31 17:03:24,502 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 356 selfloop transitions, 102 changer transitions 8/467 dead transitions. [2024-01-31 17:03:24,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 467 transitions, 4396 flow [2024-01-31 17:03:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:03:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:03:24,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 294 transitions. [2024-01-31 17:03:24,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-01-31 17:03:24,506 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 851 flow. Second operand 29 states and 294 transitions. [2024-01-31 17:03:24,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 467 transitions, 4396 flow [2024-01-31 17:03:24,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 467 transitions, 4345 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-01-31 17:03:24,559 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1776 flow [2024-01-31 17:03:24,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1776, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2024-01-31 17:03:24,560 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 116 predicate places. [2024-01-31 17:03:24,560 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1776 flow [2024-01-31 17:03:24,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:24,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:24,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:24,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:24,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:24,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:24,773 INFO L85 PathProgramCache]: Analyzing trace with hash 62821814, now seen corresponding path program 4 times [2024-01-31 17:03:24,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:24,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279147190] [2024-01-31 17:03:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:24,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279147190] [2024-01-31 17:03:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279147190] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333387113] [2024-01-31 17:03:24,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:03:24,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:24,855 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) [2024-01-31 17:03:24,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:03:24,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:03:24,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:24,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:24,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:25,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:25,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333387113] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:25,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:25,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:03:25,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841921361] [2024-01-31 17:03:25,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:25,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:03:25,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:03:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:03:25,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:25,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1776 flow. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:25,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:25,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:25,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:26,892 INFO L124 PetriNetUnfolderBase]: 7387/12114 cut-off events. [2024-01-31 17:03:26,892 INFO L125 PetriNetUnfolderBase]: For 129783/129783 co-relation queries the response was YES. [2024-01-31 17:03:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69531 conditions, 12114 events. 7387/12114 cut-off events. For 129783/129783 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79546 event pairs, 346 based on Foata normal form. 124/12238 useless extension candidates. Maximal degree in co-relation 61249. Up to 2195 conditions per place. [2024-01-31 17:03:26,985 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 362 selfloop transitions, 155 changer transitions 4/522 dead transitions. [2024-01-31 17:03:26,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 522 transitions, 5868 flow [2024-01-31 17:03:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:03:26,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:03:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 259 transitions. [2024-01-31 17:03:26,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36894586894586895 [2024-01-31 17:03:26,987 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1776 flow. Second operand 26 states and 259 transitions. [2024-01-31 17:03:26,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 522 transitions, 5868 flow [2024-01-31 17:03:27,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 522 transitions, 5686 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:27,418 INFO L231 Difference]: Finished difference. Result has 173 places, 227 transitions, 2770 flow [2024-01-31 17:03:27,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2770, PETRI_PLACES=173, PETRI_TRANSITIONS=227} [2024-01-31 17:03:27,418 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 146 predicate places. [2024-01-31 17:03:27,418 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 227 transitions, 2770 flow [2024-01-31 17:03:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:27,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:27,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:27,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:27,620 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:27,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash -257296894, now seen corresponding path program 5 times [2024-01-31 17:03:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:27,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711879275] [2024-01-31 17:03:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:27,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711879275] [2024-01-31 17:03:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711879275] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808474814] [2024-01-31 17:03:27,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:03:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:27,698 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) [2024-01-31 17:03:27,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:03:27,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:03:27,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:27,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:27,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:27,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808474814] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:27,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:03:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185650364] [2024-01-31 17:03:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:03:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:03:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:03:27,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:27,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 227 transitions, 2770 flow. Second operand has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:27,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:27,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:27,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:30,288 INFO L124 PetriNetUnfolderBase]: 8381/13728 cut-off events. [2024-01-31 17:03:30,288 INFO L125 PetriNetUnfolderBase]: For 197060/197060 co-relation queries the response was YES. [2024-01-31 17:03:30,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89246 conditions, 13728 events. 8381/13728 cut-off events. For 197060/197060 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 91937 event pairs, 922 based on Foata normal form. 66/13794 useless extension candidates. Maximal degree in co-relation 80873. Up to 3472 conditions per place. [2024-01-31 17:03:30,405 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 350 selfloop transitions, 113 changer transitions 17/481 dead transitions. [2024-01-31 17:03:30,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 481 transitions, 6004 flow [2024-01-31 17:03:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:03:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:03:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 175 transitions. [2024-01-31 17:03:30,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812636165577342 [2024-01-31 17:03:30,407 INFO L175 Difference]: Start difference. First operand has 173 places, 227 transitions, 2770 flow. Second operand 17 states and 175 transitions. [2024-01-31 17:03:30,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 481 transitions, 6004 flow [2024-01-31 17:03:31,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 481 transitions, 5491 flow, removed 201 selfloop flow, removed 13 redundant places. [2024-01-31 17:03:31,921 INFO L231 Difference]: Finished difference. Result has 184 places, 246 transitions, 2903 flow [2024-01-31 17:03:31,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2357, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2903, PETRI_PLACES=184, PETRI_TRANSITIONS=246} [2024-01-31 17:03:31,922 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 157 predicate places. [2024-01-31 17:03:31,922 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 246 transitions, 2903 flow [2024-01-31 17:03:31,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.8) internal successors, (87), 15 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:31,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:31,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:31,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:32,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:32,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1755051684, now seen corresponding path program 6 times [2024-01-31 17:03:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:32,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124725071] [2024-01-31 17:03:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:32,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:32,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:32,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124725071] [2024-01-31 17:03:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124725071] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053236493] [2024-01-31 17:03:32,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:03:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:32,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:32,238 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) [2024-01-31 17:03:32,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:03:32,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:03:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:32,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:32,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:32,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:32,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053236493] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:32,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:32,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-01-31 17:03:32,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699376140] [2024-01-31 17:03:32,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:32,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:03:32,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:32,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:03:32,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:03:32,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:32,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 246 transitions, 2903 flow. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:32,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:32,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:32,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:35,504 INFO L124 PetriNetUnfolderBase]: 10726/17642 cut-off events. [2024-01-31 17:03:35,505 INFO L125 PetriNetUnfolderBase]: For 279625/279625 co-relation queries the response was YES. [2024-01-31 17:03:35,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113417 conditions, 17642 events. 10726/17642 cut-off events. For 279625/279625 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 123934 event pairs, 479 based on Foata normal form. 86/17728 useless extension candidates. Maximal degree in co-relation 108119. Up to 4585 conditions per place. [2024-01-31 17:03:35,639 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 284 selfloop transitions, 238 changer transitions 12/535 dead transitions. [2024-01-31 17:03:35,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 535 transitions, 6729 flow [2024-01-31 17:03:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:03:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:03:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 158 transitions. [2024-01-31 17:03:35,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39012345679012345 [2024-01-31 17:03:35,641 INFO L175 Difference]: Start difference. First operand has 184 places, 246 transitions, 2903 flow. Second operand 15 states and 158 transitions. [2024-01-31 17:03:35,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 535 transitions, 6729 flow [2024-01-31 17:03:37,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 535 transitions, 6457 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-01-31 17:03:37,048 INFO L231 Difference]: Finished difference. Result has 200 places, 352 transitions, 4774 flow [2024-01-31 17:03:37,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4774, PETRI_PLACES=200, PETRI_TRANSITIONS=352} [2024-01-31 17:03:37,048 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-01-31 17:03:37,064 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 352 transitions, 4774 flow [2024-01-31 17:03:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:37,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:37,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:37,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:37,265 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:37,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1366040326, now seen corresponding path program 7 times [2024-01-31 17:03:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073122805] [2024-01-31 17:03:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:37,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:37,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:37,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073122805] [2024-01-31 17:03:37,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073122805] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:37,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696395178] [2024-01-31 17:03:37,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:03:37,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:37,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:37,404 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) [2024-01-31 17:03:37,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:03:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:37,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:37,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:37,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:37,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696395178] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:37,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:37,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:03:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870236680] [2024-01-31 17:03:37,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:03:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:03:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:03:37,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:37,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 352 transitions, 4774 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:37,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:37,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:37,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:41,722 INFO L124 PetriNetUnfolderBase]: 11998/19738 cut-off events. [2024-01-31 17:03:41,722 INFO L125 PetriNetUnfolderBase]: For 381055/381055 co-relation queries the response was YES. [2024-01-31 17:03:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136845 conditions, 19738 events. 11998/19738 cut-off events. For 381055/381055 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 141554 event pairs, 525 based on Foata normal form. 124/19862 useless extension candidates. Maximal degree in co-relation 130804. Up to 3288 conditions per place. [2024-01-31 17:03:41,924 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 407 selfloop transitions, 295 changer transitions 5/708 dead transitions. [2024-01-31 17:03:41,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 708 transitions, 9678 flow [2024-01-31 17:03:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:03:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:03:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 264 transitions. [2024-01-31 17:03:41,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-01-31 17:03:41,925 INFO L175 Difference]: Start difference. First operand has 200 places, 352 transitions, 4774 flow. Second operand 26 states and 264 transitions. [2024-01-31 17:03:41,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 708 transitions, 9678 flow [2024-01-31 17:03:44,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 708 transitions, 9436 flow, removed 121 selfloop flow, removed 0 redundant places. [2024-01-31 17:03:44,855 INFO L231 Difference]: Finished difference. Result has 238 places, 411 transitions, 6557 flow [2024-01-31 17:03:44,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6557, PETRI_PLACES=238, PETRI_TRANSITIONS=411} [2024-01-31 17:03:44,855 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2024-01-31 17:03:44,855 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 411 transitions, 6557 flow [2024-01-31 17:03:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:44,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:44,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 17:03:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:45,062 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:45,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1154449682, now seen corresponding path program 8 times [2024-01-31 17:03:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064516425] [2024-01-31 17:03:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:45,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:45,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:45,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064516425] [2024-01-31 17:03:45,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064516425] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:45,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248728966] [2024-01-31 17:03:45,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:45,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:45,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:45,153 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) [2024-01-31 17:03:45,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:03:45,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:45,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:45,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:45,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:45,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248728966] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:45,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:45,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-31 17:03:45,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448873367] [2024-01-31 17:03:45,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:45,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:03:45,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:03:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:03:45,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:45,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 411 transitions, 6557 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:45,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:45,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:45,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:50,150 INFO L124 PetriNetUnfolderBase]: 14335/23777 cut-off events. [2024-01-31 17:03:50,151 INFO L125 PetriNetUnfolderBase]: For 568629/568629 co-relation queries the response was YES. [2024-01-31 17:03:50,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175288 conditions, 23777 events. 14335/23777 cut-off events. For 568629/568629 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 177091 event pairs, 689 based on Foata normal form. 112/23889 useless extension candidates. Maximal degree in co-relation 168755. Up to 6873 conditions per place. [2024-01-31 17:03:50,597 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 347 selfloop transitions, 348 changer transitions 6/702 dead transitions. [2024-01-31 17:03:50,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 702 transitions, 11245 flow [2024-01-31 17:03:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:03:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:03:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 169 transitions. [2024-01-31 17:03:50,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912037037037037 [2024-01-31 17:03:50,598 INFO L175 Difference]: Start difference. First operand has 238 places, 411 transitions, 6557 flow. Second operand 16 states and 169 transitions. [2024-01-31 17:03:50,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 702 transitions, 11245 flow [2024-01-31 17:03:56,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 702 transitions, 10864 flow, removed 115 selfloop flow, removed 10 redundant places. [2024-01-31 17:03:56,882 INFO L231 Difference]: Finished difference. Result has 249 places, 506 transitions, 9067 flow [2024-01-31 17:03:56,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9067, PETRI_PLACES=249, PETRI_TRANSITIONS=506} [2024-01-31 17:03:56,883 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 222 predicate places. [2024-01-31 17:03:56,883 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 506 transitions, 9067 flow [2024-01-31 17:03:56,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:56,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:56,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:56,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:57,083 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,SelfDestructingSolverStorable23 [2024-01-31 17:03:57,084 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:57,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash -787515612, now seen corresponding path program 9 times [2024-01-31 17:03:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157563534] [2024-01-31 17:03:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:57,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:57,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157563534] [2024-01-31 17:03:57,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157563534] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:57,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677860188] [2024-01-31 17:03:57,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:57,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:57,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:57,184 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) [2024-01-31 17:03:57,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:03:57,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:03:57,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:57,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:03:57,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:57,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:03:57,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677860188] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:57,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:57,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:03:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100542845] [2024-01-31 17:03:57,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:03:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:03:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:03:57,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:03:57,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 506 transitions, 9067 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:57,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:57,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:03:57,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:02,694 INFO L124 PetriNetUnfolderBase]: 14341/23819 cut-off events. [2024-01-31 17:04:02,694 INFO L125 PetriNetUnfolderBase]: For 612380/612380 co-relation queries the response was YES. [2024-01-31 17:04:02,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187502 conditions, 23819 events. 14341/23819 cut-off events. For 612380/612380 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 178927 event pairs, 1950 based on Foata normal form. 34/23853 useless extension candidates. Maximal degree in co-relation 182001. Up to 7453 conditions per place. [2024-01-31 17:04:03,106 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 459 selfloop transitions, 232 changer transitions 8/700 dead transitions. [2024-01-31 17:04:03,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 700 transitions, 12278 flow [2024-01-31 17:04:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:04:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:04:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-01-31 17:04:03,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41595441595441596 [2024-01-31 17:04:03,109 INFO L175 Difference]: Start difference. First operand has 249 places, 506 transitions, 9067 flow. Second operand 13 states and 146 transitions. [2024-01-31 17:04:03,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 700 transitions, 12278 flow [2024-01-31 17:04:11,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 700 transitions, 12101 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-01-31 17:04:11,792 INFO L231 Difference]: Finished difference. Result has 253 places, 503 transitions, 9366 flow [2024-01-31 17:04:11,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8881, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9366, PETRI_PLACES=253, PETRI_TRANSITIONS=503} [2024-01-31 17:04:11,793 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 226 predicate places. [2024-01-31 17:04:11,793 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 503 transitions, 9366 flow [2024-01-31 17:04:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:11,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:11,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:11,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:12,004 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,SelfDestructingSolverStorable24 [2024-01-31 17:04:12,005 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:04:12,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash 379315641, now seen corresponding path program 10 times [2024-01-31 17:04:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:12,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026389905] [2024-01-31 17:04:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:12,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026389905] [2024-01-31 17:04:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026389905] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861619737] [2024-01-31 17:04:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:12,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:12,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:12,108 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) [2024-01-31 17:04:12,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:04:12,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:12,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:12,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:12,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861619737] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:12,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:12,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634137924] [2024-01-31 17:04:12,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:12,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:12,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:12,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:12,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:12,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:04:12,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 503 transitions, 9366 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:12,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:12,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:04:12,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:18,362 INFO L124 PetriNetUnfolderBase]: 15937/26439 cut-off events. [2024-01-31 17:04:18,362 INFO L125 PetriNetUnfolderBase]: For 707383/707383 co-relation queries the response was YES. [2024-01-31 17:04:18,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212014 conditions, 26439 events. 15937/26439 cut-off events. For 707383/707383 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 201883 event pairs, 3033 based on Foata normal form. 416/26855 useless extension candidates. Maximal degree in co-relation 206167. Up to 12752 conditions per place. [2024-01-31 17:04:18,666 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 703 selfloop transitions, 145 changer transitions 5/854 dead transitions. [2024-01-31 17:04:18,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 854 transitions, 15523 flow [2024-01-31 17:04:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:04:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:04:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2024-01-31 17:04:18,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2024-01-31 17:04:18,668 INFO L175 Difference]: Start difference. First operand has 253 places, 503 transitions, 9366 flow. Second operand 20 states and 209 transitions. [2024-01-31 17:04:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 854 transitions, 15523 flow [2024-01-31 17:04:28,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 854 transitions, 14999 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-01-31 17:04:28,499 INFO L231 Difference]: Finished difference. Result has 272 places, 550 transitions, 10467 flow [2024-01-31 17:04:28,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8825, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10467, PETRI_PLACES=272, PETRI_TRANSITIONS=550} [2024-01-31 17:04:28,500 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 245 predicate places. [2024-01-31 17:04:28,500 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 550 transitions, 10467 flow [2024-01-31 17:04:28,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:28,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:28,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:28,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:28,701 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,SelfDestructingSolverStorable25 [2024-01-31 17:04:28,701 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:04:28,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 516825142, now seen corresponding path program 11 times [2024-01-31 17:04:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:28,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961806532] [2024-01-31 17:04:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961806532] [2024-01-31 17:04:28,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961806532] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450410717] [2024-01-31 17:04:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:28,792 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) [2024-01-31 17:04:28,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:04:28,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:04:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:28,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:28,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:28,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:04:29,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450410717] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:29,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-01-31 17:04:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278679870] [2024-01-31 17:04:29,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:29,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:04:29,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:04:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:04:29,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:04:29,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 550 transitions, 10467 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:29,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:29,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:04:29,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:35,904 INFO L124 PetriNetUnfolderBase]: 17311/28573 cut-off events. [2024-01-31 17:04:35,904 INFO L125 PetriNetUnfolderBase]: For 884531/884531 co-relation queries the response was YES. [2024-01-31 17:04:36,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242714 conditions, 28573 events. 17311/28573 cut-off events. For 884531/884531 co-relation queries the response was YES. Maximal size of possible extension queue 1111. Compared 217581 event pairs, 2508 based on Foata normal form. 194/28767 useless extension candidates. Maximal degree in co-relation 238488. Up to 13065 conditions per place. [2024-01-31 17:04:36,293 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 548 selfloop transitions, 280 changer transitions 3/832 dead transitions. [2024-01-31 17:04:36,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 832 transitions, 15631 flow [2024-01-31 17:04:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:04:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:04:36,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 205 transitions. [2024-01-31 17:04:36,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3996101364522417 [2024-01-31 17:04:36,294 INFO L175 Difference]: Start difference. First operand has 272 places, 550 transitions, 10467 flow. Second operand 19 states and 205 transitions. [2024-01-31 17:04:36,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 832 transitions, 15631 flow [2024-01-31 17:04:49,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 832 transitions, 15169 flow, removed 206 selfloop flow, removed 5 redundant places. [2024-01-31 17:04:49,833 INFO L231 Difference]: Finished difference. Result has 294 places, 589 transitions, 12205 flow [2024-01-31 17:04:49,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10115, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12205, PETRI_PLACES=294, PETRI_TRANSITIONS=589} [2024-01-31 17:04:49,834 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 267 predicate places. [2024-01-31 17:04:49,834 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 589 transitions, 12205 flow [2024-01-31 17:04:49,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:49,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:49,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:04:49,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:50,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:04:50,037 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:04:50,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash 240862765, now seen corresponding path program 12 times [2024-01-31 17:04:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055502646] [2024-01-31 17:04:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055502646] [2024-01-31 17:04:50,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055502646] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452092789] [2024-01-31 17:04:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:04:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:50,116 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) [2024-01-31 17:04:50,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:04:50,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:04:50,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:50,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:04:50,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:50,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:04:50,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452092789] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:50,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:50,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:04:50,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298606393] [2024-01-31 17:04:50,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:50,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:04:50,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:50,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:04:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:04:50,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 27 [2024-01-31 17:04:50,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 589 transitions, 12205 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:50,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:50,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 27 [2024-01-31 17:04:50,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand