./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.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/test-context1.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/test-context1.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-context1.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 17:20:09,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:20:09,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:20:09,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:20:09,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:20:09,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:20:09,728 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:20:09,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:20:09,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:20:09,732 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:20:09,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:20:09,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:20:09,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:20:09,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:20:09,743 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:20:09,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:20:09,743 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:20:09,744 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:20:09,744 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:20:09,744 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:20:09,744 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:20:09,745 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:20:09,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:20:09,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:20:09,745 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:20:09,745 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:20:09,746 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:20:09,746 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:20:09,746 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:20:09,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:20:09,747 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:20:09,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:20:09,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:20:09,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:20:09,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:20:09,748 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:20:09,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:20:09,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:20:09,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:20:09,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:20:10,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:20:10,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:20:10,013 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:20:10,013 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:20:10,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-01-31 17:20:11,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:20:11,295 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:20:11,296 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-01-31 17:20:11,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e29e2fd01/96e5d8bc43924c4ea8126332044bf1fe/FLAG2f5d4d0c1 [2024-01-31 17:20:11,313 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e29e2fd01/96e5d8bc43924c4ea8126332044bf1fe [2024-01-31 17:20:11,315 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:20:11,315 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:20:11,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/test-context1.wvr.yml/witness.yml [2024-01-31 17:20:11,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:20:11,455 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:20:11,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:20:11,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:20:11,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:20:11,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:20:11" (1/2) ... [2024-01-31 17:20:11,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79299bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:20:11, skipping insertion in model container [2024-01-31 17:20:11,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:20:11" (1/2) ... [2024-01-31 17:20:11,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7152fba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:20:11, skipping insertion in model container [2024-01-31 17:20:11,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:20:11" (2/2) ... [2024-01-31 17:20:11,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79299bf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11, skipping insertion in model container [2024-01-31 17:20:11,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:20:11" (2/2) ... [2024-01-31 17:20:11,480 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:20:11,531 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:20:11,550 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:20:11,713 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/test-context1.wvr.c[2459,2472] [2024-01-31 17:20:11,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:20:11,733 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:20:11,746 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/test-context1.wvr.c[2459,2472] [2024-01-31 17:20:11,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:20:11,763 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:20:11,764 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11 WrapperNode [2024-01-31 17:20:11,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:20:11,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:20:11,766 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:20:11,766 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:20:11,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,787 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,815 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2024-01-31 17:20:11,815 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:20:11,816 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:20:11,816 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:20:11,817 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:20:11,825 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,825 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,860 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 17:20:11,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,883 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,885 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:20:11,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:20:11,889 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:20:11,889 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:20:11,890 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (1/1) ... [2024-01-31 17:20:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:20:11,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:11,922 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 17:20:11,928 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 17:20:11,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:20:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:20:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:20:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:20:11,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:20:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:20:11,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:20:11,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:20:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:20:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:20:11,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:20:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:20:11,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:20:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:20:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:20:11,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:20:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:20:11,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:20:11,960 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 17:20:12,067 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:20:12,069 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:20:12,239 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:20:12,240 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:20:12,418 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:20:12,418 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:20:12,419 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:20:12 BoogieIcfgContainer [2024-01-31 17:20:12,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:20:12,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:20:12,421 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:20:12,423 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:20:12,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:20:11" (1/4) ... [2024-01-31 17:20:12,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de25e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:20:12, skipping insertion in model container [2024-01-31 17:20:12,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:20:11" (2/4) ... [2024-01-31 17:20:12,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de25e2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:20:12, skipping insertion in model container [2024-01-31 17:20:12,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:20:11" (3/4) ... [2024-01-31 17:20:12,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de25e2b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:20:12, skipping insertion in model container [2024-01-31 17:20:12,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:20:12" (4/4) ... [2024-01-31 17:20:12,426 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-01-31 17:20:12,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:20:12,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:20:12,439 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:20:12,478 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:20:12,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2024-01-31 17:20:12,534 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-01-31 17:20:12,536 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:20:12,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-01-31 17:20:12,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2024-01-31 17:20:12,542 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2024-01-31 17:20:12,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:20:12,559 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;@554326ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:20:12,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:20:12,567 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:20:12,569 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-01-31 17:20:12,569 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:20:12,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:12,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:12,570 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 17:20:12,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1474316529, now seen corresponding path program 1 times [2024-01-31 17:20:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:12,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460237559] [2024-01-31 17:20:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:12,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:12,796 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 17:20:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460237559] [2024-01-31 17:20:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460237559] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:20:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:20:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:20:12,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374561586] [2024-01-31 17:20:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:20:12,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:20:12,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:20:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:20:12,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:12,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:20:12,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:12,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:12,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:12,907 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2024-01-31 17:20:12,907 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:20:12,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2024-01-31 17:20:12,911 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-01-31 17:20:12,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2024-01-31 17:20:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:20:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:20:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-01-31 17:20:12,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-01-31 17:20:12,920 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2024-01-31 17:20:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2024-01-31 17:20:12,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:20:12,924 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2024-01-31 17:20:12,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-31 17:20:12,928 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-01-31 17:20:12,928 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2024-01-31 17:20:12,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 17:20:12,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:12,929 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 17:20:12,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:20:12,929 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 17:20:12,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1351442730, now seen corresponding path program 1 times [2024-01-31 17:20:12,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:12,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516408721] [2024-01-31 17:20:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:13,055 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 17:20:13,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:13,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516408721] [2024-01-31 17:20:13,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516408721] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:20:13,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:20:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:20:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115817101] [2024-01-31 17:20:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:20:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:20:13,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:20:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:20:13,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:13,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 17:20:13,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:13,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:13,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:13,153 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2024-01-31 17:20:13,154 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 17:20:13,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1240 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2024-01-31 17:20:13,157 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-01-31 17:20:13,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2024-01-31 17:20:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:20:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:20:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-31 17:20:13,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-01-31 17:20:13,160 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-01-31 17:20:13,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2024-01-31 17:20:13,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:20:13,165 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2024-01-31 17:20:13,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2024-01-31 17:20:13,167 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-01-31 17:20:13,168 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2024-01-31 17:20:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 17:20:13,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:13,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:13,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:20:13,170 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 17:20:13,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -959153222, now seen corresponding path program 1 times [2024-01-31 17:20:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027523851] [2024-01-31 17:20:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027523851] [2024-01-31 17:20:13,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027523851] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:20:13,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:20:13,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:20:13,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894838479] [2024-01-31 17:20:13,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:20:13,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:20:13,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:20:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:20:13,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:13,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 17:20:13,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:13,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:13,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:13,369 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2024-01-31 17:20:13,370 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-31 17:20:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1568 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2024-01-31 17:20:13,374 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2024-01-31 17:20:13,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2024-01-31 17:20:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:20:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:20:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-31 17:20:13,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-01-31 17:20:13,376 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-31 17:20:13,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2024-01-31 17:20:13,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:20:13,379 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2024-01-31 17:20:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-01-31 17:20:13,381 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2024-01-31 17:20:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2024-01-31 17:20:13,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 17:20:13,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:13,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:20:13,381 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 17:20:13,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash 171303639, now seen corresponding path program 1 times [2024-01-31 17:20:13,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:13,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218186356] [2024-01-31 17:20:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:13,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218186356] [2024-01-31 17:20:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218186356] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:20:13,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:20:13,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:20:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313547521] [2024-01-31 17:20:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:20:13,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:20:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:20:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:20:13,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:13,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 17:20:13,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:13,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:13,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:13,686 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2024-01-31 17:20:13,686 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-31 17:20:13,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2278 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2024-01-31 17:20:13,688 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2024-01-31 17:20:13,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2024-01-31 17:20:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:20:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:20:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-31 17:20:13,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-01-31 17:20:13,691 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2024-01-31 17:20:13,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2024-01-31 17:20:13,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:20:13,693 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2024-01-31 17:20:13,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-31 17:20:13,695 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-01-31 17:20:13,695 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2024-01-31 17:20:13,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 17:20:13,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:13,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 17:20:13,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:20:13,696 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 17:20:13,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:13,696 INFO L85 PathProgramCache]: Analyzing trace with hash -832023193, now seen corresponding path program 1 times [2024-01-31 17:20:13,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:13,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811074866] [2024-01-31 17:20:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:13,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811074866] [2024-01-31 17:20:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811074866] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691077062] [2024-01-31 17:20:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:13,944 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 17:20:14,000 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 17:20:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:14,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:20:14,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:14,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:14,216 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:14,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-31 17:20:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691077062] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:14,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-31 17:20:14,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836978215] [2024-01-31 17:20:14,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:14,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:20:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:20:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:20:14,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:14,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 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 17:20:14,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:14,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:14,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:14,364 INFO L124 PetriNetUnfolderBase]: 232/455 cut-off events. [2024-01-31 17:20:14,364 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-31 17:20:14,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 455 events. 232/455 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2030 event pairs, 45 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 974. Up to 113 conditions per place. [2024-01-31 17:20:14,366 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 39 selfloop transitions, 5 changer transitions 13/62 dead transitions. [2024-01-31 17:20:14,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 62 transitions, 283 flow [2024-01-31 17:20:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:20:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:20:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-01-31 17:20:14,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-01-31 17:20:14,370 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 6 states and 99 transitions. [2024-01-31 17:20:14,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 62 transitions, 283 flow [2024-01-31 17:20:14,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 17:20:14,372 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 100 flow [2024-01-31 17:20:14,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-01-31 17:20:14,375 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-01-31 17:20:14,375 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 100 flow [2024-01-31 17:20:14,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 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 17:20:14,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:14,375 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 17:20:14,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:20:14,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:14,589 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 17:20:14,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1783023759, now seen corresponding path program 2 times [2024-01-31 17:20:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:14,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549865873] [2024-01-31 17:20:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:14,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:14,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549865873] [2024-01-31 17:20:14,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549865873] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459506092] [2024-01-31 17:20:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:20:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:14,668 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 17:20:14,711 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 17:20:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:20:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:14,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:20:14,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:20:14,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:20:14,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459506092] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:14,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:14,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-01-31 17:20:14,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682191433] [2024-01-31 17:20:14,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:14,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:20:14,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:20:14,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:20:14,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:14,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 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 17:20:14,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:14,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:14,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:15,156 INFO L124 PetriNetUnfolderBase]: 657/1294 cut-off events. [2024-01-31 17:20:15,157 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2024-01-31 17:20:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2845 conditions, 1294 events. 657/1294 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7539 event pairs, 234 based on Foata normal form. 38/1094 useless extension candidates. Maximal degree in co-relation 2837. Up to 335 conditions per place. [2024-01-31 17:20:15,161 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 9 changer transitions 39/99 dead transitions. [2024-01-31 17:20:15,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 99 transitions, 492 flow [2024-01-31 17:20:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:20:15,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:20:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-01-31 17:20:15,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2024-01-31 17:20:15,162 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 100 flow. Second operand 9 states and 155 transitions. [2024-01-31 17:20:15,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 99 transitions, 492 flow [2024-01-31 17:20:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 99 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-31 17:20:15,165 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 172 flow [2024-01-31 17:20:15,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-01-31 17:20:15,166 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-01-31 17:20:15,166 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 172 flow [2024-01-31 17:20:15,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 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 17:20:15,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:15,166 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:15,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-01-31 17:20:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 17:20:15,379 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 17:20:15,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -23646222, now seen corresponding path program 3 times [2024-01-31 17:20:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591164038] [2024-01-31 17:20:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:15,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:15,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591164038] [2024-01-31 17:20:15,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591164038] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:15,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282139972] [2024-01-31 17:20:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:20:15,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:15,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:15,786 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 17:20:15,805 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 17:20:15,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:20:15,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:15,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:20:15,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:15,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-31 17:20:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:16,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:16,369 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 43 treesize of output 39 [2024-01-31 17:20:16,378 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:16,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 47 [2024-01-31 17:20:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:16,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282139972] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:16,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:16,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-01-31 17:20:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432877362] [2024-01-31 17:20:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:20:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:20:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:20:16,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:16,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 172 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 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 17:20:16,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:16,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:17,689 INFO L124 PetriNetUnfolderBase]: 2135/4134 cut-off events. [2024-01-31 17:20:17,690 INFO L125 PetriNetUnfolderBase]: For 3313/3313 co-relation queries the response was YES. [2024-01-31 17:20:17,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10023 conditions, 4134 events. 2135/4134 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 27771 event pairs, 336 based on Foata normal form. 14/3420 useless extension candidates. Maximal degree in co-relation 10010. Up to 624 conditions per place. [2024-01-31 17:20:17,703 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 204 selfloop transitions, 44 changer transitions 75/328 dead transitions. [2024-01-31 17:20:17,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 328 transitions, 1829 flow [2024-01-31 17:20:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:20:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:20:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 501 transitions. [2024-01-31 17:20:17,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169950738916257 [2024-01-31 17:20:17,705 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 172 flow. Second operand 28 states and 501 transitions. [2024-01-31 17:20:17,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 328 transitions, 1829 flow [2024-01-31 17:20:17,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 328 transitions, 1785 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-01-31 17:20:17,712 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 658 flow [2024-01-31 17:20:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=658, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-01-31 17:20:17,713 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2024-01-31 17:20:17,713 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 658 flow [2024-01-31 17:20:17,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 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 17:20:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:17,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:17,728 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 17:20:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:17,926 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 17:20:17,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1384883908, now seen corresponding path program 4 times [2024-01-31 17:20:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:17,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483063061] [2024-01-31 17:20:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:17,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:18,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:18,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483063061] [2024-01-31 17:20:18,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483063061] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548610145] [2024-01-31 17:20:18,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:20:18,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:18,108 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 17:20:18,132 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 17:20:18,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:20:18,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:18,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:20:18,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:18,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:18,380 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:18,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-31 17:20:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:18,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548610145] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:18,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-01-31 17:20:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454120538] [2024-01-31 17:20:18,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:20:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:20:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:20:18,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:18,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 658 flow. Second operand has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 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 17:20:18,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:18,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:18,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:19,357 INFO L124 PetriNetUnfolderBase]: 3255/6184 cut-off events. [2024-01-31 17:20:19,357 INFO L125 PetriNetUnfolderBase]: For 15436/15436 co-relation queries the response was YES. [2024-01-31 17:20:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17580 conditions, 6184 events. 3255/6184 cut-off events. For 15436/15436 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 43790 event pairs, 680 based on Foata normal form. 6/5101 useless extension candidates. Maximal degree in co-relation 17554. Up to 1067 conditions per place. [2024-01-31 17:20:19,380 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 129 selfloop transitions, 56 changer transitions 40/230 dead transitions. [2024-01-31 17:20:19,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 230 transitions, 1858 flow [2024-01-31 17:20:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:20:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:20:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 274 transitions. [2024-01-31 17:20:19,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6298850574712643 [2024-01-31 17:20:19,382 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 658 flow. Second operand 15 states and 274 transitions. [2024-01-31 17:20:19,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 230 transitions, 1858 flow [2024-01-31 17:20:19,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 230 transitions, 1654 flow, removed 98 selfloop flow, removed 3 redundant places. [2024-01-31 17:20:19,421 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 883 flow [2024-01-31 17:20:19,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=883, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2024-01-31 17:20:19,422 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 65 predicate places. [2024-01-31 17:20:19,422 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 883 flow [2024-01-31 17:20:19,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.8125) internal successors, (173), 16 states have internal predecessors, (173), 0 states have call successors, (0), 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 17:20:19,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:19,422 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:19,436 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 17:20:19,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:19,634 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 17:20:19,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1585923942, now seen corresponding path program 5 times [2024-01-31 17:20:19,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:19,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234500423] [2024-01-31 17:20:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:19,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:19,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:19,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234500423] [2024-01-31 17:20:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234500423] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:19,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998827367] [2024-01-31 17:20:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:20:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:19,712 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 17:20:19,759 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 17:20:19,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:20:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:19,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:20:19,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:20:19,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:20:19,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998827367] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:19,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:19,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-01-31 17:20:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572455557] [2024-01-31 17:20:19,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:19,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:20:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:20:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:20:19,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:19,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 92 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 17:20:19,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:19,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:19,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:21,010 INFO L124 PetriNetUnfolderBase]: 6541/12370 cut-off events. [2024-01-31 17:20:21,010 INFO L125 PetriNetUnfolderBase]: For 33168/33168 co-relation queries the response was YES. [2024-01-31 17:20:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35212 conditions, 12370 events. 6541/12370 cut-off events. For 33168/33168 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 100076 event pairs, 1818 based on Foata normal form. 90/10288 useless extension candidates. Maximal degree in co-relation 35184. Up to 4068 conditions per place. [2024-01-31 17:20:21,064 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 104 selfloop transitions, 82 changer transitions 0/191 dead transitions. [2024-01-31 17:20:21,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 191 transitions, 2105 flow [2024-01-31 17:20:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:20:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:20:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-01-31 17:20:21,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827586206896552 [2024-01-31 17:20:21,066 INFO L175 Difference]: Start difference. First operand has 93 places, 92 transitions, 883 flow. Second operand 5 states and 99 transitions. [2024-01-31 17:20:21,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 191 transitions, 2105 flow [2024-01-31 17:20:21,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 191 transitions, 1693 flow, removed 140 selfloop flow, removed 14 redundant places. [2024-01-31 17:20:21,106 INFO L231 Difference]: Finished difference. Result has 86 places, 152 transitions, 1598 flow [2024-01-31 17:20:21,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1598, PETRI_PLACES=86, PETRI_TRANSITIONS=152} [2024-01-31 17:20:21,108 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-01-31 17:20:21,108 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 152 transitions, 1598 flow [2024-01-31 17:20:21,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 17:20:21,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:21,109 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:21,122 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 17:20:21,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:21,324 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 17:20:21,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1438938041, now seen corresponding path program 6 times [2024-01-31 17:20:21,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:21,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778424209] [2024-01-31 17:20:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:21,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:20:21,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778424209] [2024-01-31 17:20:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778424209] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783082785] [2024-01-31 17:20:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:20:21,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:21,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:21,489 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 17:20:21,532 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 17:20:21,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:20:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:21,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:20:21,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:21,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-31 17:20:21,946 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-01-31 17:20:21,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-01-31 17:20:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-31 17:20:21,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:22,643 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 41 treesize of output 37 [2024-01-31 17:20:22,651 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-01-31 17:20:22,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 43 [2024-01-31 17:20:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-31 17:20:22,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783082785] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:22,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-31 17:20:22,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383453858] [2024-01-31 17:20:22,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:22,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:20:22,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:22,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:20:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:20:22,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:22,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 152 transitions, 1598 flow. Second operand has 22 states, 22 states have (on average 10.045454545454545) internal successors, (221), 22 states have internal predecessors, (221), 0 states have call successors, (0), 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 17:20:22,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:22,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:22,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:23,658 INFO L124 PetriNetUnfolderBase]: 2564/5052 cut-off events. [2024-01-31 17:20:23,659 INFO L125 PetriNetUnfolderBase]: For 13993/13993 co-relation queries the response was YES. [2024-01-31 17:20:23,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 5052 events. 2564/5052 cut-off events. For 13993/13993 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 36662 event pairs, 1050 based on Foata normal form. 75/4236 useless extension candidates. Maximal degree in co-relation 14096. Up to 2805 conditions per place. [2024-01-31 17:20:23,677 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 59 selfloop transitions, 9 changer transitions 77/150 dead transitions. [2024-01-31 17:20:23,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 150 transitions, 1265 flow [2024-01-31 17:20:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:20:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:20:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-01-31 17:20:23,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-01-31 17:20:23,679 INFO L175 Difference]: Start difference. First operand has 86 places, 152 transitions, 1598 flow. Second operand 12 states and 188 transitions. [2024-01-31 17:20:23,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 150 transitions, 1265 flow [2024-01-31 17:20:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 150 transitions, 1171 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-01-31 17:20:23,704 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 577 flow [2024-01-31 17:20:23,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=577, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2024-01-31 17:20:23,705 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-01-31 17:20:23,706 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 577 flow [2024-01-31 17:20:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.045454545454545) internal successors, (221), 22 states have internal predecessors, (221), 0 states have call successors, (0), 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 17:20:23,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:23,707 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:23,737 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 17:20:23,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:23,918 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 17:20:23,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:23,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1358877817, now seen corresponding path program 7 times [2024-01-31 17:20:23,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:23,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748960153] [2024-01-31 17:20:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:23,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:24,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:24,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748960153] [2024-01-31 17:20:24,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748960153] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:24,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198098241] [2024-01-31 17:20:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:20:24,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:24,355 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 17:20:24,359 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 17:20:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:24,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 17:20:24,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:20:24,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:24,679 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:24,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-31 17:20:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:20:24,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198098241] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:24,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-01-31 17:20:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809733905] [2024-01-31 17:20:24,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:24,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:20:24,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:20:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:20:24,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:24,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 577 flow. Second operand has 25 states, 25 states have (on average 10.0) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 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 17:20:24,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:24,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:25,845 INFO L124 PetriNetUnfolderBase]: 2887/5471 cut-off events. [2024-01-31 17:20:25,846 INFO L125 PetriNetUnfolderBase]: For 10232/10232 co-relation queries the response was YES. [2024-01-31 17:20:25,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14999 conditions, 5471 events. 2887/5471 cut-off events. For 10232/10232 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 39283 event pairs, 213 based on Foata normal form. 20/4540 useless extension candidates. Maximal degree in co-relation 14973. Up to 832 conditions per place. [2024-01-31 17:20:25,866 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 128 selfloop transitions, 63 changer transitions 86/282 dead transitions. [2024-01-31 17:20:25,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 282 transitions, 1907 flow [2024-01-31 17:20:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:20:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:20:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 422 transitions. [2024-01-31 17:20:25,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063218390804598 [2024-01-31 17:20:25,868 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 577 flow. Second operand 24 states and 422 transitions. [2024-01-31 17:20:25,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 282 transitions, 1907 flow [2024-01-31 17:20:25,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 282 transitions, 1642 flow, removed 98 selfloop flow, removed 14 redundant places. [2024-01-31 17:20:25,897 INFO L231 Difference]: Finished difference. Result has 95 places, 86 transitions, 869 flow [2024-01-31 17:20:25,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=869, PETRI_PLACES=95, PETRI_TRANSITIONS=86} [2024-01-31 17:20:25,898 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2024-01-31 17:20:25,898 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 86 transitions, 869 flow [2024-01-31 17:20:25,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.0) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 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 17:20:25,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:25,899 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:25,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:20:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:26,115 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 17:20:26,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash 67419759, now seen corresponding path program 8 times [2024-01-31 17:20:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114983016] [2024-01-31 17:20:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:20:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114983016] [2024-01-31 17:20:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114983016] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026095461] [2024-01-31 17:20:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:20:26,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:26,261 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 17:20:26,278 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 17:20:26,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:20:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:26,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:20:26,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:20:26,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:20:26,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026095461] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:26,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:26,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-01-31 17:20:26,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649766265] [2024-01-31 17:20:26,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:26,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:20:26,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:20:26,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:20:26,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:26,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 86 transitions, 869 flow. Second operand has 26 states, 26 states have (on average 9.807692307692308) internal successors, (255), 26 states have internal predecessors, (255), 0 states have call successors, (0), 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 17:20:26,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:26,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:27,907 INFO L124 PetriNetUnfolderBase]: 5653/11010 cut-off events. [2024-01-31 17:20:27,907 INFO L125 PetriNetUnfolderBase]: For 16823/16823 co-relation queries the response was YES. [2024-01-31 17:20:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 11010 events. 5653/11010 cut-off events. For 16823/16823 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 92918 event pairs, 3478 based on Foata normal form. 220/9292 useless extension candidates. Maximal degree in co-relation 28077. Up to 5054 conditions per place. [2024-01-31 17:20:27,942 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 75 selfloop transitions, 5 changer transitions 95/180 dead transitions. [2024-01-31 17:20:27,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 1888 flow [2024-01-31 17:20:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:20:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:20:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-01-31 17:20:27,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 17:20:27,944 INFO L175 Difference]: Start difference. First operand has 95 places, 86 transitions, 869 flow. Second operand 10 states and 145 transitions. [2024-01-31 17:20:27,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 1888 flow [2024-01-31 17:20:27,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 180 transitions, 1624 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-01-31 17:20:27,986 INFO L231 Difference]: Finished difference. Result has 97 places, 85 transitions, 814 flow [2024-01-31 17:20:27,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=814, PETRI_PLACES=97, PETRI_TRANSITIONS=85} [2024-01-31 17:20:27,986 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 69 predicate places. [2024-01-31 17:20:27,986 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 85 transitions, 814 flow [2024-01-31 17:20:27,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.807692307692308) internal successors, (255), 26 states have internal predecessors, (255), 0 states have call successors, (0), 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 17:20:27,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:27,987 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:27,998 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 17:20:28,198 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,SelfDestructingSolverStorable11 [2024-01-31 17:20:28,198 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 17:20:28,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:28,199 INFO L85 PathProgramCache]: Analyzing trace with hash 782912447, now seen corresponding path program 9 times [2024-01-31 17:20:28,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:28,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077750604] [2024-01-31 17:20:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:28,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:20:28,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077750604] [2024-01-31 17:20:28,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077750604] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:28,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730767229] [2024-01-31 17:20:28,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:20:28,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:28,313 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 17:20:28,339 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 17:20:28,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:20:28,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:28,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:20:28,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 17:20:28,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-01-31 17:20:28,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730767229] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:28,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:28,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-01-31 17:20:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165032453] [2024-01-31 17:20:28,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:28,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:20:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:20:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:20:28,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:28,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 85 transitions, 814 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 17:20:28,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:28,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:28,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:29,241 INFO L124 PetriNetUnfolderBase]: 5394/10097 cut-off events. [2024-01-31 17:20:29,242 INFO L125 PetriNetUnfolderBase]: For 15127/15127 co-relation queries the response was YES. [2024-01-31 17:20:29,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26374 conditions, 10097 events. 5394/10097 cut-off events. For 15127/15127 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 80523 event pairs, 1125 based on Foata normal form. 20/8354 useless extension candidates. Maximal degree in co-relation 26340. Up to 2540 conditions per place. [2024-01-31 17:20:29,282 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 97 selfloop transitions, 82 changer transitions 0/184 dead transitions. [2024-01-31 17:20:29,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 184 transitions, 1979 flow [2024-01-31 17:20:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:20:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:20:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-01-31 17:20:29,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2024-01-31 17:20:29,284 INFO L175 Difference]: Start difference. First operand has 97 places, 85 transitions, 814 flow. Second operand 6 states and 121 transitions. [2024-01-31 17:20:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 184 transitions, 1979 flow [2024-01-31 17:20:29,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 184 transitions, 1799 flow, removed 85 selfloop flow, removed 9 redundant places. [2024-01-31 17:20:29,318 INFO L231 Difference]: Finished difference. Result has 90 places, 132 transitions, 1440 flow [2024-01-31 17:20:29,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1440, PETRI_PLACES=90, PETRI_TRANSITIONS=132} [2024-01-31 17:20:29,319 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-01-31 17:20:29,319 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 132 transitions, 1440 flow [2024-01-31 17:20:29,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 17:20:29,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:29,319 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:29,334 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 17:20:29,531 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,SelfDestructingSolverStorable12 [2024-01-31 17:20:29,531 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 17:20:29,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:29,532 INFO L85 PathProgramCache]: Analyzing trace with hash -241771246, now seen corresponding path program 10 times [2024-01-31 17:20:29,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:29,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478894019] [2024-01-31 17:20:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:30,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:30,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478894019] [2024-01-31 17:20:30,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478894019] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:30,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390820256] [2024-01-31 17:20:30,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:20:30,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:30,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:30,016 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 17:20:30,042 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 17:20:30,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:20:30,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:30,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:20:30,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:20:30,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:30,247 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:30,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-01-31 17:20:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:20:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390820256] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:30,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2024-01-31 17:20:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474306506] [2024-01-31 17:20:30,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:30,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:20:30,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:20:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:20:30,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 132 transitions, 1440 flow. Second operand has 22 states, 22 states have (on average 9.590909090909092) internal successors, (211), 22 states have internal predecessors, (211), 0 states have call successors, (0), 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 17:20:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:30,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:30,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:32,579 INFO L124 PetriNetUnfolderBase]: 8816/16647 cut-off events. [2024-01-31 17:20:32,579 INFO L125 PetriNetUnfolderBase]: For 29028/29028 co-relation queries the response was YES. [2024-01-31 17:20:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44944 conditions, 16647 events. 8816/16647 cut-off events. For 29028/29028 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 141588 event pairs, 581 based on Foata normal form. 16/13784 useless extension candidates. Maximal degree in co-relation 44913. Up to 2544 conditions per place. [2024-01-31 17:20:32,676 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 316 selfloop transitions, 186 changer transitions 92/599 dead transitions. [2024-01-31 17:20:32,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 599 transitions, 4932 flow [2024-01-31 17:20:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 17:20:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 17:20:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 771 transitions. [2024-01-31 17:20:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6330049261083743 [2024-01-31 17:20:32,679 INFO L175 Difference]: Start difference. First operand has 90 places, 132 transitions, 1440 flow. Second operand 42 states and 771 transitions. [2024-01-31 17:20:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 599 transitions, 4932 flow [2024-01-31 17:20:32,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 599 transitions, 4806 flow, removed 63 selfloop flow, removed 0 redundant places. [2024-01-31 17:20:32,751 INFO L231 Difference]: Finished difference. Result has 148 places, 221 transitions, 2857 flow [2024-01-31 17:20:32,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2857, PETRI_PLACES=148, PETRI_TRANSITIONS=221} [2024-01-31 17:20:32,752 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 120 predicate places. [2024-01-31 17:20:32,752 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 221 transitions, 2857 flow [2024-01-31 17:20:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.590909090909092) internal successors, (211), 22 states have internal predecessors, (211), 0 states have call successors, (0), 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 17:20:32,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:32,752 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:32,766 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 17:20:32,967 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,SelfDestructingSolverStorable13 [2024-01-31 17:20:32,967 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 17:20:32,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:32,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1942008732, now seen corresponding path program 11 times [2024-01-31 17:20:32,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:32,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647137359] [2024-01-31 17:20:32,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:32,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:33,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:33,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647137359] [2024-01-31 17:20:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647137359] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352499528] [2024-01-31 17:20:33,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:20:33,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:33,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:33,409 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 17:20:33,432 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 17:20:33,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-01-31 17:20:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:33,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 17:20:33,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:20:33,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:33,810 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:33,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-31 17:20:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:20:33,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352499528] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:33,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:33,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2024-01-31 17:20:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936673699] [2024-01-31 17:20:33,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:20:33,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:20:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:20:33,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:33,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 221 transitions, 2857 flow. Second operand has 32 states, 32 states have (on average 9.75) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 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 17:20:33,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:33,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:33,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:37,615 INFO L124 PetriNetUnfolderBase]: 11484/21651 cut-off events. [2024-01-31 17:20:37,615 INFO L125 PetriNetUnfolderBase]: For 55265/55265 co-relation queries the response was YES. [2024-01-31 17:20:37,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61012 conditions, 21651 events. 11484/21651 cut-off events. For 55265/55265 co-relation queries the response was YES. Maximal size of possible extension queue 953. Compared 192751 event pairs, 789 based on Foata normal form. 1/17909 useless extension candidates. Maximal degree in co-relation 60963. Up to 3312 conditions per place. [2024-01-31 17:20:37,697 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 292 selfloop transitions, 268 changer transitions 100/665 dead transitions. [2024-01-31 17:20:37,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 665 transitions, 6549 flow [2024-01-31 17:20:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 17:20:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 17:20:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 734 transitions. [2024-01-31 17:20:37,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173254835996635 [2024-01-31 17:20:37,700 INFO L175 Difference]: Start difference. First operand has 148 places, 221 transitions, 2857 flow. Second operand 41 states and 734 transitions. [2024-01-31 17:20:37,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 665 transitions, 6549 flow [2024-01-31 17:20:37,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 665 transitions, 5985 flow, removed 87 selfloop flow, removed 12 redundant places. [2024-01-31 17:20:37,898 INFO L231 Difference]: Finished difference. Result has 177 places, 290 transitions, 3647 flow [2024-01-31 17:20:37,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=3647, PETRI_PLACES=177, PETRI_TRANSITIONS=290} [2024-01-31 17:20:37,898 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 149 predicate places. [2024-01-31 17:20:37,899 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 290 transitions, 3647 flow [2024-01-31 17:20:37,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.75) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 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 17:20:37,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:37,899 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:37,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 17:20:38,110 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,SelfDestructingSolverStorable14 [2024-01-31 17:20:38,111 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 17:20:38,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1641925668, now seen corresponding path program 12 times [2024-01-31 17:20:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138507464] [2024-01-31 17:20:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:38,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:38,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:38,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138507464] [2024-01-31 17:20:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138507464] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:38,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196368] [2024-01-31 17:20:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:20:38,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:38,488 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 17:20:38,500 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 17:20:38,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-01-31 17:20:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:38,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2024-01-31 17:20:38,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:20:38,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:38,937 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:38,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-31 17:20:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-31 17:20:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196368] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:39,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 25 [2024-01-31 17:20:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389759784] [2024-01-31 17:20:39,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:39,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:20:39,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:20:39,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:20:39,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:39,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 290 transitions, 3647 flow. Second operand has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 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 17:20:39,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:39,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:39,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:44,951 INFO L124 PetriNetUnfolderBase]: 17960/33731 cut-off events. [2024-01-31 17:20:44,951 INFO L125 PetriNetUnfolderBase]: For 111084/111084 co-relation queries the response was YES. [2024-01-31 17:20:45,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94369 conditions, 33731 events. 17960/33731 cut-off events. For 111084/111084 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 315094 event pairs, 1501 based on Foata normal form. 47/27947 useless extension candidates. Maximal degree in co-relation 94318. Up to 5168 conditions per place. [2024-01-31 17:20:45,242 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 577 selfloop transitions, 427 changer transitions 185/1194 dead transitions. [2024-01-31 17:20:45,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1194 transitions, 11297 flow [2024-01-31 17:20:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-31 17:20:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-31 17:20:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1421 transitions. [2024-01-31 17:20:45,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-01-31 17:20:45,245 INFO L175 Difference]: Start difference. First operand has 177 places, 290 transitions, 3647 flow. Second operand 75 states and 1421 transitions. [2024-01-31 17:20:45,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1194 transitions, 11297 flow [2024-01-31 17:20:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 1194 transitions, 11065 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-01-31 17:20:45,636 INFO L231 Difference]: Finished difference. Result has 267 places, 465 transitions, 6833 flow [2024-01-31 17:20:45,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=6833, PETRI_PLACES=267, PETRI_TRANSITIONS=465} [2024-01-31 17:20:45,637 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 239 predicate places. [2024-01-31 17:20:45,637 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 465 transitions, 6833 flow [2024-01-31 17:20:45,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.884615384615385) internal successors, (257), 26 states have internal predecessors, (257), 0 states have call successors, (0), 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 17:20:45,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:45,638 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:45,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:20:45,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:20:45,850 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 17:20:45,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:45,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1410736848, now seen corresponding path program 13 times [2024-01-31 17:20:45,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:45,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682906102] [2024-01-31 17:20:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:45,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:20:46,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:46,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682906102] [2024-01-31 17:20:46,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682906102] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750977338] [2024-01-31 17:20:46,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:20:46,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:46,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:46,247 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:20:46,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:20:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:46,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 17:20:46,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:20:46,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:46,623 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:20:46,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-31 17:20:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-01-31 17:20:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750977338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:46,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:46,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2024-01-31 17:20:46,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740562066] [2024-01-31 17:20:46,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:46,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:20:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:46,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:20:46,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:20:46,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:46,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 465 transitions, 6833 flow. Second operand has 31 states, 31 states have (on average 9.838709677419354) internal successors, (305), 31 states have internal predecessors, (305), 0 states have call successors, (0), 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 17:20:46,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:46,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:46,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:20:54,308 INFO L124 PetriNetUnfolderBase]: 20144/37496 cut-off events. [2024-01-31 17:20:54,308 INFO L125 PetriNetUnfolderBase]: For 220346/220346 co-relation queries the response was YES. [2024-01-31 17:20:54,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110482 conditions, 37496 events. 20144/37496 cut-off events. For 220346/220346 co-relation queries the response was YES. Maximal size of possible extension queue 1335. Compared 350519 event pairs, 2253 based on Foata normal form. 61/31024 useless extension candidates. Maximal degree in co-relation 110403. Up to 5792 conditions per place. [2024-01-31 17:20:54,785 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 184 selfloop transitions, 501 changer transitions 165/855 dead transitions. [2024-01-31 17:20:54,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 855 transitions, 10151 flow [2024-01-31 17:20:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:20:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:20:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 681 transitions. [2024-01-31 17:20:54,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179673321234119 [2024-01-31 17:20:54,788 INFO L175 Difference]: Start difference. First operand has 267 places, 465 transitions, 6833 flow. Second operand 38 states and 681 transitions. [2024-01-31 17:20:54,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 855 transitions, 10151 flow [2024-01-31 17:20:55,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 855 transitions, 9222 flow, removed 365 selfloop flow, removed 25 redundant places. [2024-01-31 17:20:55,844 INFO L231 Difference]: Finished difference. Result has 293 places, 524 transitions, 8680 flow [2024-01-31 17:20:55,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6060, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8680, PETRI_PLACES=293, PETRI_TRANSITIONS=524} [2024-01-31 17:20:55,845 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 265 predicate places. [2024-01-31 17:20:55,845 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 524 transitions, 8680 flow [2024-01-31 17:20:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.838709677419354) internal successors, (305), 31 states have internal predecessors, (305), 0 states have call successors, (0), 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 17:20:55,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:20:55,845 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:20:55,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:20:56,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:20:56,056 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 17:20:56,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:20:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -792608198, now seen corresponding path program 14 times [2024-01-31 17:20:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:20:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885366738] [2024-01-31 17:20:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:20:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:20:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:20:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 17:20:56,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:20:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885366738] [2024-01-31 17:20:56,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885366738] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:20:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858858716] [2024-01-31 17:20:56,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:20:56,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:20:56,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:20:56,223 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:20:56,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:20:56,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:20:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:20:56,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:20:56,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:20:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 17:20:56,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:20:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-01-31 17:20:56,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858858716] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:20:56,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:20:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-01-31 17:20:56,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341031383] [2024-01-31 17:20:56,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:20:56,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-31 17:20:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:20:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-31 17:20:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2024-01-31 17:20:56,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:20:56,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 524 transitions, 8680 flow. Second operand has 32 states, 32 states have (on average 9.5625) internal successors, (306), 32 states have internal predecessors, (306), 0 states have call successors, (0), 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 17:20:56,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:20:56,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:20:56,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:21:09,196 INFO L124 PetriNetUnfolderBase]: 37195/72173 cut-off events. [2024-01-31 17:21:09,196 INFO L125 PetriNetUnfolderBase]: For 287378/287378 co-relation queries the response was YES. [2024-01-31 17:21:10,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209669 conditions, 72173 events. 37195/72173 cut-off events. For 287378/287378 co-relation queries the response was YES. Maximal size of possible extension queue 2951. Compared 783996 event pairs, 23634 based on Foata normal form. 1850/61353 useless extension candidates. Maximal degree in co-relation 209590. Up to 35030 conditions per place. [2024-01-31 17:21:10,396 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 514 selfloop transitions, 6 changer transitions 359/884 dead transitions. [2024-01-31 17:21:10,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 884 transitions, 15849 flow [2024-01-31 17:21:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:21:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:21:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 172 transitions. [2024-01-31 17:21:10,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-01-31 17:21:10,398 INFO L175 Difference]: Start difference. First operand has 293 places, 524 transitions, 8680 flow. Second operand 12 states and 172 transitions. [2024-01-31 17:21:10,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 884 transitions, 15849 flow [2024-01-31 17:21:14,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 884 transitions, 15351 flow, removed 13 selfloop flow, removed 30 redundant places. [2024-01-31 17:21:14,084 INFO L231 Difference]: Finished difference. Result has 280 places, 525 transitions, 9041 flow [2024-01-31 17:21:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8369, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9041, PETRI_PLACES=280, PETRI_TRANSITIONS=525} [2024-01-31 17:21:14,085 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 252 predicate places. [2024-01-31 17:21:14,085 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 525 transitions, 9041 flow [2024-01-31 17:21:14,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.5625) internal successors, (306), 32 states have internal predecessors, (306), 0 states have call successors, (0), 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 17:21:14,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:21:14,086 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:21:14,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-31 17:21:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:21:14,296 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 17:21:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:21:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -829318422, now seen corresponding path program 15 times [2024-01-31 17:21:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:21:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371274208] [2024-01-31 17:21:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:21:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:21:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:21:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-31 17:21:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:21:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371274208] [2024-01-31 17:21:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371274208] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:21:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081878836] [2024-01-31 17:21:14,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:21:14,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:21:14,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:21:14,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:21:14,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:21:14,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-01-31 17:21:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:21:14,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:21:14,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:21:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-31 17:21:14,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:21:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-31 17:21:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081878836] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:21:14,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:21:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2024-01-31 17:21:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705314926] [2024-01-31 17:21:14,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:21:14,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:21:14,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:21:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:21:14,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:21:14,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-31 17:21:14,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 525 transitions, 9041 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 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 17:21:14,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:21:14,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-31 17:21:14,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand