./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-channel-sum.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-channel-sum.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 17:02:45,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:02:45,135 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:02:45,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:02:45,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:02:45,183 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:02:45,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:02:45,184 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:02:45,184 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:02:45,187 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:02:45,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:02:45,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:02:45,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:02:45,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:02:45,190 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:02:45,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:02:45,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:02:45,190 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:02:45,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:02:45,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:02:45,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:02:45,191 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:02:45,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:02:45,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:02:45,192 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:02:45,192 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:02:45,193 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:02:45,193 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:02:45,193 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:02:45,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:02:45,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:02:45,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:02:45,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:45,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:02:45,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:02:45,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:02:45,195 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:02:45,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:02:45,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:02:45,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:02:45,196 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:02:45,196 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:02:45,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:02:45,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:02:45,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:02:45,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:02:45,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:02:45,445 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:02:45,445 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:02:45,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-01-31 17:02:46,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:02:46,580 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:02:46,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-01-31 17:02:46,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c289778/9628d53f34164e15b475b91df4137fb7/FLAGbd06f2acc [2024-01-31 17:02:46,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7c289778/9628d53f34164e15b475b91df4137fb7 [2024-01-31 17:02:46,605 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:02:46,606 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:02:46,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-channel-sum.wvr.yml/witness.yml [2024-01-31 17:02:46,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:02:46,738 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:02:46,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:46,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:02:46,743 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:02:46,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:46" (1/2) ... [2024-01-31 17:02:46,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a853806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:46, skipping insertion in model container [2024-01-31 17:02:46,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:46" (1/2) ... [2024-01-31 17:02:46,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@362361ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:46, skipping insertion in model container [2024-01-31 17:02:46,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:46" (2/2) ... [2024-01-31 17:02:46,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a853806 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:46, skipping insertion in model container [2024-01-31 17:02:46,746 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:46" (2/2) ... [2024-01-31 17:02:46,746 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:02:46,786 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:02:46,787 INFO L98 nessWitnessExtractor]: Location invariant after [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 17:02:46,787 INFO L98 nessWitnessExtractor]: Location invariant after [L64-L64] ((unsigned long )_argptr == 0UL) && (flag == (_Bool)0 || flag == (_Bool)1) [2024-01-31 17:02:46,805 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:02:46,965 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2024-01-31 17:02:46,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:46,984 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:02:46,997 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:02:47,001 WARN L424 MainDispatcher]: Unable to annotate _Bool with a witness entry [2024-01-31 17:02:47,015 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2024-01-31 17:02:47,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:47,033 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:02:47,034 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:47 WrapperNode [2024-01-31 17:02:47,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:47,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:47,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:02:47,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:02:47,040 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,052 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,077 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2024-01-31 17:02:47,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:47,079 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:02:47,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:02:47,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:02:47,087 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,087 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,097 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,108 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 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 17:02:47,109 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,109 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,113 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,116 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,117 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,118 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,129 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:02:47,130 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:02:47,144 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:02:47,144 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:02:47,145 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 05:02:47" (1/1) ... [2024-01-31 17:02:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:47,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:47,177 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 17:02:47,183 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 17:02:47,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:02:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:02:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:02:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:02:47,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:02:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:02:47,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:02:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:02:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:02:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:02:47,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:02:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:02:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:02:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:02:47,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:02:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:02:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:02:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:02:47,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:02:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:02:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:02:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:02:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:02:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:02:47,212 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 17:02:47,321 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:02:47,322 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:02:47,598 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:02:47,599 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:02:47,758 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:02:47,760 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:02:47,761 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:47 BoogieIcfgContainer [2024-01-31 17:02:47,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:02:47,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:02:47,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:02:47,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:02:47,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:02:46" (1/4) ... [2024-01-31 17:02:47,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f37b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:47, skipping insertion in model container [2024-01-31 17:02:47,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:46" (2/4) ... [2024-01-31 17:02:47,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f37b73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:47, skipping insertion in model container [2024-01-31 17:02:47,771 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 05:02:47" (3/4) ... [2024-01-31 17:02:47,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f37b73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:47, skipping insertion in model container [2024-01-31 17:02:47,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:47" (4/4) ... [2024-01-31 17:02:47,773 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-01-31 17:02:47,785 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:02:47,786 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:02:47,786 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:02:47,838 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:02:47,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-01-31 17:02:47,899 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-01-31 17:02:47,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:02:47,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-31 17:02:47,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-01-31 17:02:47,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 74 flow [2024-01-31 17:02:47,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:02:47,924 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;@3f023b12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:02:47,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:02:47,938 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:02:47,938 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2024-01-31 17:02:47,938 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:02:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:47,939 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 17:02:47,940 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 17:02:47,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1658882849, now seen corresponding path program 1 times [2024-01-31 17:02:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695431717] [2024-01-31 17:02:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:47,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:48,144 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 17:02:48,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695431717] [2024-01-31 17:02:48,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695431717] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:48,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:48,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:48,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295372517] [2024-01-31 17:02:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:48,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:02:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:48,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:02:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:02:48,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:48,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 17:02:48,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:48,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:48,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:48,260 INFO L124 PetriNetUnfolderBase]: 96/199 cut-off events. [2024-01-31 17:02:48,260 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-31 17:02:48,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 199 events. 96/199 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 852 event pairs, 78 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 287. Up to 170 conditions per place. [2024-01-31 17:02:48,263 INFO L140 encePairwiseOnDemand]: 33/34 looper letters, 22 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2024-01-31 17:02:48,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 116 flow [2024-01-31 17:02:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:02:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:02:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 43 transitions. [2024-01-31 17:02:48,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-01-31 17:02:48,273 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 74 flow. Second operand 2 states and 43 transitions. [2024-01-31 17:02:48,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 116 flow [2024-01-31 17:02:48,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:02:48,278 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 64 flow [2024-01-31 17:02:48,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-01-31 17:02:48,284 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-31 17:02:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 64 flow [2024-01-31 17:02:48,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 17:02:48,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:48,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:48,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:02:48,285 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 17:02:48,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2052383742, now seen corresponding path program 1 times [2024-01-31 17:02:48,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:48,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49133889] [2024-01-31 17:02:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:48,443 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 17:02:48,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49133889] [2024-01-31 17:02:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49133889] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:48,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:48,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159608573] [2024-01-31 17:02:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:48,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:48,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 17:02:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:48,519 INFO L124 PetriNetUnfolderBase]: 160/316 cut-off events. [2024-01-31 17:02:48,519 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 17:02:48,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 316 events. 160/316 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1399 event pairs, 51 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 596. Up to 157 conditions per place. [2024-01-31 17:02:48,524 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 34 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2024-01-31 17:02:48,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 179 flow [2024-01-31 17:02:48,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-31 17:02:48,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-01-31 17:02:48,530 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 64 flow. Second operand 3 states and 70 transitions. [2024-01-31 17:02:48,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 179 flow [2024-01-31 17:02:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:02:48,538 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 76 flow [2024-01-31 17:02:48,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-01-31 17:02:48,539 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2024-01-31 17:02:48,539 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 76 flow [2024-01-31 17:02:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 17:02:48,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:48,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:02:48,540 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 17:02:48,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash -870829824, now seen corresponding path program 1 times [2024-01-31 17:02:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247024138] [2024-01-31 17:02:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:48,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:48,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:48,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247024138] [2024-01-31 17:02:48,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247024138] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:48,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:48,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461394726] [2024-01-31 17:02:48,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:48,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:48,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:48,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:48,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 17:02:48,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:48,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:48,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:48,801 INFO L124 PetriNetUnfolderBase]: 193/385 cut-off events. [2024-01-31 17:02:48,801 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-01-31 17:02:48,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 385 events. 193/385 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1894 event pairs, 148 based on Foata normal form. 17/365 useless extension candidates. Maximal degree in co-relation 794. Up to 276 conditions per place. [2024-01-31 17:02:48,804 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 13/45 dead transitions. [2024-01-31 17:02:48,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 182 flow [2024-01-31 17:02:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-01-31 17:02:48,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5735294117647058 [2024-01-31 17:02:48,809 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 76 flow. Second operand 4 states and 78 transitions. [2024-01-31 17:02:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 182 flow [2024-01-31 17:02:48,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:48,811 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 90 flow [2024-01-31 17:02:48,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-31 17:02:48,812 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-01-31 17:02:48,812 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 90 flow [2024-01-31 17:02:48,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 17:02:48,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:48,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:48,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:02:48,813 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 17:02:48,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1787168473, now seen corresponding path program 1 times [2024-01-31 17:02:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:48,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283565304] [2024-01-31 17:02:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:48,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:49,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:49,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283565304] [2024-01-31 17:02:49,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283565304] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:49,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:49,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651297786] [2024-01-31 17:02:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:49,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:49,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-31 17:02:49,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 17:02:49,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:49,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-31 17:02:49,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:49,164 INFO L124 PetriNetUnfolderBase]: 256/497 cut-off events. [2024-01-31 17:02:49,165 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-01-31 17:02:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 497 events. 256/497 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2060 event pairs, 55 based on Foata normal form. 18/472 useless extension candidates. Maximal degree in co-relation 1019. Up to 302 conditions per place. [2024-01-31 17:02:49,167 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 38 selfloop transitions, 6 changer transitions 8/58 dead transitions. [2024-01-31 17:02:49,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 253 flow [2024-01-31 17:02:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-01-31 17:02:49,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-01-31 17:02:49,170 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 90 flow. Second operand 4 states and 83 transitions. [2024-01-31 17:02:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 253 flow [2024-01-31 17:02:49,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 249 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:49,172 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 123 flow [2024-01-31 17:02:49,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-01-31 17:02:49,173 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2024-01-31 17:02:49,173 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 123 flow [2024-01-31 17:02:49,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 17:02:49,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:49,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:49,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:02:49,174 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 17:02:49,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1953381751, now seen corresponding path program 1 times [2024-01-31 17:02:49,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:49,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507244906] [2024-01-31 17:02:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:02:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507244906] [2024-01-31 17:02:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507244906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:49,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700664240] [2024-01-31 17:02:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:49,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:49,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:49,331 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 17:02:49,356 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 17:02:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 17:02:49,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:49,491 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 17:02:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:49,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:49,891 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 61 treesize of output 55 [2024-01-31 17:02:49,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:49,902 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 78 treesize of output 68 [2024-01-31 17:02:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:49,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700664240] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:49,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2024-01-31 17:02:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066406506] [2024-01-31 17:02:49,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:49,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:02:49,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:02:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:02:49,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-31 17:02:49,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 123 flow. Second operand has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 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 17:02:49,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:49,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-31 17:02:49,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:51,213 INFO L124 PetriNetUnfolderBase]: 1276/2548 cut-off events. [2024-01-31 17:02:51,214 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-01-31 17:02:51,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 2548 events. 1276/2548 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16562 event pairs, 150 based on Foata normal form. 72/2385 useless extension candidates. Maximal degree in co-relation 5723. Up to 337 conditions per place. [2024-01-31 17:02:51,223 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 118 selfloop transitions, 46 changer transitions 212/382 dead transitions. [2024-01-31 17:02:51,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 382 transitions, 1840 flow [2024-01-31 17:02:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 17:02:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 17:02:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 720 transitions. [2024-01-31 17:02:51,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-01-31 17:02:51,227 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 123 flow. Second operand 42 states and 720 transitions. [2024-01-31 17:02:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 382 transitions, 1840 flow [2024-01-31 17:02:51,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 382 transitions, 1840 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:02:51,235 INFO L231 Difference]: Finished difference. Result has 111 places, 75 transitions, 530 flow [2024-01-31 17:02:51,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=530, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2024-01-31 17:02:51,237 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 78 predicate places. [2024-01-31 17:02:51,237 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 530 flow [2024-01-31 17:02:51,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 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 17:02:51,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:51,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:51,252 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 17:02:51,450 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 17:02:51,450 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 17:02:51,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -419275172, now seen corresponding path program 1 times [2024-01-31 17:02:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459520848] [2024-01-31 17:02:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459520848] [2024-01-31 17:02:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459520848] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:51,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:51,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:02:51,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70684895] [2024-01-31 17:02:51,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:51,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-31 17:02:51,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 530 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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 17:02:51,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:51,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-31 17:02:51,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:51,663 INFO L124 PetriNetUnfolderBase]: 642/1270 cut-off events. [2024-01-31 17:02:51,664 INFO L125 PetriNetUnfolderBase]: For 6503/6503 co-relation queries the response was YES. [2024-01-31 17:02:51,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4529 conditions, 1270 events. 642/1270 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7481 event pairs, 130 based on Foata normal form. 8/1227 useless extension candidates. Maximal degree in co-relation 4490. Up to 1023 conditions per place. [2024-01-31 17:02:51,672 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 70 selfloop transitions, 2 changer transitions 2/80 dead transitions. [2024-01-31 17:02:51,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 80 transitions, 692 flow [2024-01-31 17:02:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-31 17:02:51,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-01-31 17:02:51,673 INFO L175 Difference]: Start difference. First operand has 111 places, 75 transitions, 530 flow. Second operand 3 states and 61 transitions. [2024-01-31 17:02:51,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 80 transitions, 692 flow [2024-01-31 17:02:51,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 558 flow, removed 62 selfloop flow, removed 21 redundant places. [2024-01-31 17:02:51,690 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 338 flow [2024-01-31 17:02:51,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-01-31 17:02:51,691 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2024-01-31 17:02:51,691 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 338 flow [2024-01-31 17:02:51,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 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 17:02:51,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:51,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:51,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:02:51,692 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 17:02:51,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1328297943, now seen corresponding path program 2 times [2024-01-31 17:02:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591517388] [2024-01-31 17:02:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591517388] [2024-01-31 17:02:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591517388] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347917598] [2024-01-31 17:02:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:02:51,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:51,781 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 17:02:51,783 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 17:02:51,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:02:51,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:51,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:02:51,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:51,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:52,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347917598] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:52,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:52,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-01-31 17:02:52,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024217751] [2024-01-31 17:02:52,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:52,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:02:52,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:52,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:02:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:02:52,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:52,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 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 17:02:52,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:52,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:52,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:52,270 INFO L124 PetriNetUnfolderBase]: 538/1138 cut-off events. [2024-01-31 17:02:52,270 INFO L125 PetriNetUnfolderBase]: For 1922/1922 co-relation queries the response was YES. [2024-01-31 17:02:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 1138 events. 538/1138 cut-off events. For 1922/1922 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6678 event pairs, 257 based on Foata normal form. 18/1077 useless extension candidates. Maximal degree in co-relation 3210. Up to 598 conditions per place. [2024-01-31 17:02:52,275 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 53/106 dead transitions. [2024-01-31 17:02:52,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 690 flow [2024-01-31 17:02:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:02:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:02:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-01-31 17:02:52,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-01-31 17:02:52,277 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 338 flow. Second operand 9 states and 162 transitions. [2024-01-31 17:02:52,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 690 flow [2024-01-31 17:02:52,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 687 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:52,283 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 278 flow [2024-01-31 17:02:52,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-01-31 17:02:52,283 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2024-01-31 17:02:52,283 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 278 flow [2024-01-31 17:02:52,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 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 17:02:52,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:52,284 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:52,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:52,495 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,SelfDestructingSolverStorable6 [2024-01-31 17:02:52,496 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 17:02:52,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1789961256, now seen corresponding path program 3 times [2024-01-31 17:02:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977422899] [2024-01-31 17:02:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:52,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977422899] [2024-01-31 17:02:53,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977422899] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:53,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211732355] [2024-01-31 17:02:53,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:02:53,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:53,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:53,384 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 17:02:53,408 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 17:02:53,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:02:53,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:53,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:02:53,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:02:53,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:53,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:53,626 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 40 treesize of output 24 [2024-01-31 17:02:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-31 17:02:53,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211732355] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:53,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2024-01-31 17:02:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648178804] [2024-01-31 17:02:53,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:02:53,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:02:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:02:53,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:53,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 278 flow. Second operand has 16 states, 16 states have (on average 13.625) internal successors, (218), 16 states have internal predecessors, (218), 0 states have call successors, (0), 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 17:02:53,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:53,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:53,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:54,050 INFO L124 PetriNetUnfolderBase]: 470/990 cut-off events. [2024-01-31 17:02:54,050 INFO L125 PetriNetUnfolderBase]: For 2561/2561 co-relation queries the response was YES. [2024-01-31 17:02:54,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 990 events. 470/990 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5662 event pairs, 116 based on Foata normal form. 1/931 useless extension candidates. Maximal degree in co-relation 3033. Up to 266 conditions per place. [2024-01-31 17:02:54,056 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 73 selfloop transitions, 26 changer transitions 11/119 dead transitions. [2024-01-31 17:02:54,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 833 flow [2024-01-31 17:02:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:02:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:02:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-01-31 17:02:54,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2024-01-31 17:02:54,058 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 278 flow. Second operand 14 states and 233 transitions. [2024-01-31 17:02:54,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 833 flow [2024-01-31 17:02:54,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 727 flow, removed 50 selfloop flow, removed 12 redundant places. [2024-01-31 17:02:54,065 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 389 flow [2024-01-31 17:02:54,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=389, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-01-31 17:02:54,067 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-01-31 17:02:54,067 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 389 flow [2024-01-31 17:02:54,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.625) internal successors, (218), 16 states have internal predecessors, (218), 0 states have call successors, (0), 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 17:02:54,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:54,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:54,081 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 17:02:54,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:54,279 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 17:02:54,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash -572103158, now seen corresponding path program 4 times [2024-01-31 17:02:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:54,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489040125] [2024-01-31 17:02:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489040125] [2024-01-31 17:02:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489040125] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822555240] [2024-01-31 17:02:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:02:54,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:54,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:54,382 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 17:02:54,412 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 17:02:54,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:02:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:02:54,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:02:54,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:54,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:54,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822555240] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:54,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:54,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 8 [2024-01-31 17:02:54,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029144951] [2024-01-31 17:02:54,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 17:02:54,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 17:02:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:02:54,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-31 17:02:54,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 389 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 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 17:02:54,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:54,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-31 17:02:54,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:54,969 INFO L124 PetriNetUnfolderBase]: 1400/2784 cut-off events. [2024-01-31 17:02:54,970 INFO L125 PetriNetUnfolderBase]: For 5689/5701 co-relation queries the response was YES. [2024-01-31 17:02:54,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2784 events. 1400/2784 cut-off events. For 5689/5701 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 16496 event pairs, 59 based on Foata normal form. 312/2949 useless extension candidates. Maximal degree in co-relation 8200. Up to 423 conditions per place. [2024-01-31 17:02:54,985 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 148 selfloop transitions, 53 changer transitions 12/220 dead transitions. [2024-01-31 17:02:54,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 220 transitions, 1649 flow [2024-01-31 17:02:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:02:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:02:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-01-31 17:02:54,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678733031674208 [2024-01-31 17:02:54,987 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 389 flow. Second operand 13 states and 251 transitions. [2024-01-31 17:02:54,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 220 transitions, 1649 flow [2024-01-31 17:02:55,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 220 transitions, 1580 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-01-31 17:02:55,007 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 841 flow [2024-01-31 17:02:55,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=841, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-01-31 17:02:55,008 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 58 predicate places. [2024-01-31 17:02:55,008 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 841 flow [2024-01-31 17:02:55,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 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 17:02:55,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:55,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 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 17:02:55,020 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 17:02:55,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:55,220 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 17:02:55,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1552872440, now seen corresponding path program 5 times [2024-01-31 17:02:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:55,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38846287] [2024-01-31 17:02:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:55,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:02:55,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:55,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38846287] [2024-01-31 17:02:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38846287] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:55,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433898053] [2024-01-31 17:02:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:55,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:02:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:02:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:02:55,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-01-31 17:02:55,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 17:02:55,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:55,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-01-31 17:02:55,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:55,701 INFO L124 PetriNetUnfolderBase]: 1742/3534 cut-off events. [2024-01-31 17:02:55,702 INFO L125 PetriNetUnfolderBase]: For 12612/12864 co-relation queries the response was YES. [2024-01-31 17:02:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 3534 events. 1742/3534 cut-off events. For 12612/12864 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 21407 event pairs, 382 based on Foata normal form. 284/3618 useless extension candidates. Maximal degree in co-relation 13002. Up to 1664 conditions per place. [2024-01-31 17:02:55,726 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 112 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-01-31 17:02:55,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 1287 flow [2024-01-31 17:02:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:02:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:02:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-01-31 17:02:55,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 17:02:55,727 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 841 flow. Second operand 4 states and 68 transitions. [2024-01-31 17:02:55,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 1287 flow [2024-01-31 17:02:55,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 124 transitions, 1230 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:55,746 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 788 flow [2024-01-31 17:02:55,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=788, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2024-01-31 17:02:55,747 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 60 predicate places. [2024-01-31 17:02:55,747 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 788 flow [2024-01-31 17:02:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 17:02:55,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:55,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:55,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-31 17:02:55,748 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 17:02:55,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 211475535, now seen corresponding path program 1 times [2024-01-31 17:02:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:55,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907623315] [2024-01-31 17:02:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:55,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907623315] [2024-01-31 17:02:56,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907623315] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:56,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741852429] [2024-01-31 17:02:56,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:56,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:56,353 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 17:02:56,355 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 17:02:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:56,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:02:56,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:56,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:57,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:57,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-31 17:02:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:57,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741852429] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:57,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:57,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-01-31 17:02:57,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540131123] [2024-01-31 17:02:57,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:02:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:02:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:02:57,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:02:57,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 788 flow. Second operand has 34 states, 34 states have (on average 12.088235294117647) internal successors, (411), 34 states have internal predecessors, (411), 0 states have call successors, (0), 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 17:02:57,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:57,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:02:57,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:59,742 INFO L124 PetriNetUnfolderBase]: 3822/8536 cut-off events. [2024-01-31 17:02:59,742 INFO L125 PetriNetUnfolderBase]: For 25291/25877 co-relation queries the response was YES. [2024-01-31 17:02:59,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30459 conditions, 8536 events. 3822/8536 cut-off events. For 25291/25877 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 66978 event pairs, 689 based on Foata normal form. 258/8228 useless extension candidates. Maximal degree in co-relation 30430. Up to 1537 conditions per place. [2024-01-31 17:02:59,792 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 258 selfloop transitions, 177 changer transitions 135/583 dead transitions. [2024-01-31 17:02:59,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 583 transitions, 4937 flow [2024-01-31 17:02:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-31 17:02:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-31 17:02:59,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 930 transitions. [2024-01-31 17:02:59,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470588235294118 [2024-01-31 17:02:59,796 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 788 flow. Second operand 50 states and 930 transitions. [2024-01-31 17:02:59,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 583 transitions, 4937 flow [2024-01-31 17:02:59,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 583 transitions, 4931 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:59,856 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3100 flow [2024-01-31 17:02:59,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3100, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-01-31 17:02:59,857 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 143 predicate places. [2024-01-31 17:02:59,857 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3100 flow [2024-01-31 17:02:59,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.088235294117647) internal successors, (411), 34 states have internal predecessors, (411), 0 states have call successors, (0), 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 17:02:59,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:59,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:59,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-31 17:03:00,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:00,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2012747589, now seen corresponding path program 2 times [2024-01-31 17:03:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:00,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697544113] [2024-01-31 17:03:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:00,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:00,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697544113] [2024-01-31 17:03:00,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697544113] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:00,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827569436] [2024-01-31 17:03:00,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:00,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:00,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:00,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:00,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:03:00,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:00,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:00,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:03:00,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:01,284 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-01-31 17:03:01,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 20 [2024-01-31 17:03:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:01,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:01,641 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:03:01,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-01-31 17:03:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827569436] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:02,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:02,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-01-31 17:03:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739203341] [2024-01-31 17:03:02,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:02,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-31 17:03:02,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-31 17:03:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2024-01-31 17:03:02,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:02,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3100 flow. Second operand has 33 states, 33 states have (on average 12.212121212121213) internal successors, (403), 33 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:02,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:02,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:02,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:07,424 INFO L124 PetriNetUnfolderBase]: 7751/17042 cut-off events. [2024-01-31 17:03:07,424 INFO L125 PetriNetUnfolderBase]: For 181290/182790 co-relation queries the response was YES. [2024-01-31 17:03:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80404 conditions, 17042 events. 7751/17042 cut-off events. For 181290/182790 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 147928 event pairs, 1301 based on Foata normal form. 690/16647 useless extension candidates. Maximal degree in co-relation 80340. Up to 5594 conditions per place. [2024-01-31 17:03:07,719 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 335 selfloop transitions, 373 changer transitions 79/800 dead transitions. [2024-01-31 17:03:07,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 800 transitions, 10493 flow [2024-01-31 17:03:07,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:03:07,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:03:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 676 transitions. [2024-01-31 17:03:07,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373608903020668 [2024-01-31 17:03:07,722 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3100 flow. Second operand 37 states and 676 transitions. [2024-01-31 17:03:07,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 800 transitions, 10493 flow [2024-01-31 17:03:08,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 800 transitions, 9349 flow, removed 540 selfloop flow, removed 10 redundant places. [2024-01-31 17:03:08,173 INFO L231 Difference]: Finished difference. Result has 221 places, 535 transitions, 7596 flow [2024-01-31 17:03:08,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7596, PETRI_PLACES=221, PETRI_TRANSITIONS=535} [2024-01-31 17:03:08,173 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 188 predicate places. [2024-01-31 17:03:08,174 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 535 transitions, 7596 flow [2024-01-31 17:03:08,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.212121212121213) internal successors, (403), 33 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:08,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:08,174 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:08,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:08,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:08,385 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:08,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -61107629, now seen corresponding path program 3 times [2024-01-31 17:03:08,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:08,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858287951] [2024-01-31 17:03:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:08,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858287951] [2024-01-31 17:03:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858287951] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172258438] [2024-01-31 17:03:09,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:09,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:09,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:09,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:03:09,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:03:09,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:09,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:03:09,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:09,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:09,980 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-31 17:03:09,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-01-31 17:03:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:10,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172258438] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:10,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:10,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 33 [2024-01-31 17:03:10,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792739646] [2024-01-31 17:03:10,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:10,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-31 17:03:10,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:10,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-31 17:03:10,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2024-01-31 17:03:10,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:10,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 535 transitions, 7596 flow. Second operand has 34 states, 34 states have (on average 12.147058823529411) internal successors, (413), 34 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:10,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:10,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:10,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:18,457 INFO L124 PetriNetUnfolderBase]: 12566/27092 cut-off events. [2024-01-31 17:03:18,457 INFO L125 PetriNetUnfolderBase]: For 484911/487621 co-relation queries the response was YES. [2024-01-31 17:03:18,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143809 conditions, 27092 events. 12566/27092 cut-off events. For 484911/487621 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 245689 event pairs, 1717 based on Foata normal form. 1609/27047 useless extension candidates. Maximal degree in co-relation 143731. Up to 4401 conditions per place. [2024-01-31 17:03:18,733 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 289 selfloop transitions, 775 changer transitions 84/1161 dead transitions. [2024-01-31 17:03:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1161 transitions, 17125 flow [2024-01-31 17:03:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:03:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:03:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 683 transitions. [2024-01-31 17:03:18,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286377708978328 [2024-01-31 17:03:18,735 INFO L175 Difference]: Start difference. First operand has 221 places, 535 transitions, 7596 flow. Second operand 38 states and 683 transitions. [2024-01-31 17:03:18,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1161 transitions, 17125 flow [2024-01-31 17:03:20,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 1161 transitions, 16331 flow, removed 385 selfloop flow, removed 9 redundant places. [2024-01-31 17:03:20,223 INFO L231 Difference]: Finished difference. Result has 260 places, 935 transitions, 15559 flow [2024-01-31 17:03:20,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=15559, PETRI_PLACES=260, PETRI_TRANSITIONS=935} [2024-01-31 17:03:20,224 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 227 predicate places. [2024-01-31 17:03:20,224 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 935 transitions, 15559 flow [2024-01-31 17:03:20,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.147058823529411) internal successors, (413), 34 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:20,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:20,224 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, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:20,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 17:03:20,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:20,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:20,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1149214406, now seen corresponding path program 4 times [2024-01-31 17:03:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:20,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150635878] [2024-01-31 17:03:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:20,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:21,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150635878] [2024-01-31 17:03:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150635878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:21,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298546150] [2024-01-31 17:03:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:03:21,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:21,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:21,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:03:21,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:03:21,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:21,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:03:21,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:21,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:21,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:21,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-31 17:03:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:03:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298546150] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:22,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:22,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 7] total 26 [2024-01-31 17:03:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519432834] [2024-01-31 17:03:22,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:22,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:03:22,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:03:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:03:22,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:22,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 935 transitions, 15559 flow. Second operand has 27 states, 27 states have (on average 12.703703703703704) internal successors, (343), 27 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:22,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:22,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:22,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:29,731 INFO L124 PetriNetUnfolderBase]: 12202/26466 cut-off events. [2024-01-31 17:03:29,731 INFO L125 PetriNetUnfolderBase]: For 550756/553344 co-relation queries the response was YES. [2024-01-31 17:03:29,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150232 conditions, 26466 events. 12202/26466 cut-off events. For 550756/553344 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 242292 event pairs, 3578 based on Foata normal form. 1420/26281 useless extension candidates. Maximal degree in co-relation 150143. Up to 17224 conditions per place. [2024-01-31 17:03:30,039 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 612 selfloop transitions, 459 changer transitions 66/1150 dead transitions. [2024-01-31 17:03:30,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1150 transitions, 20034 flow [2024-01-31 17:03:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:03:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:03:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 585 transitions. [2024-01-31 17:03:30,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49159663865546216 [2024-01-31 17:03:30,046 INFO L175 Difference]: Start difference. First operand has 260 places, 935 transitions, 15559 flow. Second operand 35 states and 585 transitions. [2024-01-31 17:03:30,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1150 transitions, 20034 flow [2024-01-31 17:03:32,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1150 transitions, 18934 flow, removed 468 selfloop flow, removed 14 redundant places. [2024-01-31 17:03:32,360 INFO L231 Difference]: Finished difference. Result has 287 places, 976 transitions, 16384 flow [2024-01-31 17:03:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14575, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16384, PETRI_PLACES=287, PETRI_TRANSITIONS=976} [2024-01-31 17:03:32,361 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 254 predicate places. [2024-01-31 17:03:32,361 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 976 transitions, 16384 flow [2024-01-31 17:03:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.703703703703704) internal successors, (343), 27 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:32,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:32,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:32,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:32,562 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,SelfDestructingSolverStorable13 [2024-01-31 17:03:32,562 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:32,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash -125023005, now seen corresponding path program 5 times [2024-01-31 17:03:32,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:32,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474717131] [2024-01-31 17:03:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-31 17:03:32,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474717131] [2024-01-31 17:03:32,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474717131] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833897173] [2024-01-31 17:03:32,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:03:32,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:32,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:32,679 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:32,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:03:32,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:03:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:32,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:03:32,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-31 17:03:32,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-31 17:03:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833897173] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:32,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-01-31 17:03:32,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434706397] [2024-01-31 17:03:32,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:32,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:03:32,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:03:32,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:03:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:32,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 976 transitions, 16384 flow. Second operand has 18 states, 18 states have (on average 12.166666666666666) internal successors, (219), 18 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:32,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:32,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:32,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:34,495 INFO L124 PetriNetUnfolderBase]: 2491/5812 cut-off events. [2024-01-31 17:03:34,496 INFO L125 PetriNetUnfolderBase]: For 129442/130046 co-relation queries the response was YES. [2024-01-31 17:03:34,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31583 conditions, 5812 events. 2491/5812 cut-off events. For 129442/130046 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 43724 event pairs, 1418 based on Foata normal form. 488/5900 useless extension candidates. Maximal degree in co-relation 31489. Up to 3428 conditions per place. [2024-01-31 17:03:34,687 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 167 selfloop transitions, 4 changer transitions 106/290 dead transitions. [2024-01-31 17:03:34,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 290 transitions, 4724 flow [2024-01-31 17:03:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:03:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:03:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-01-31 17:03:34,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367647058823529 [2024-01-31 17:03:34,689 INFO L175 Difference]: Start difference. First operand has 287 places, 976 transitions, 16384 flow. Second operand 8 states and 146 transitions. [2024-01-31 17:03:34,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 290 transitions, 4724 flow [2024-01-31 17:03:34,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 290 transitions, 4038 flow, removed 134 selfloop flow, removed 38 redundant places. [2024-01-31 17:03:34,859 INFO L231 Difference]: Finished difference. Result has 237 places, 184 transitions, 2359 flow [2024-01-31 17:03:34,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2359, PETRI_PLACES=237, PETRI_TRANSITIONS=184} [2024-01-31 17:03:34,860 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 204 predicate places. [2024-01-31 17:03:34,860 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 184 transitions, 2359 flow [2024-01-31 17:03:34,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.166666666666666) internal successors, (219), 18 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:34,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:34,860 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:34,873 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 17:03:35,060 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,SelfDestructingSolverStorable14 [2024-01-31 17:03:35,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:35,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:35,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1749700144, now seen corresponding path program 6 times [2024-01-31 17:03:35,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:35,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956643724] [2024-01-31 17:03:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:35,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:03:35,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:35,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956643724] [2024-01-31 17:03:35,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956643724] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:35,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216381544] [2024-01-31 17:03:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:03:35,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:35,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:35,194 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 17:03:35,200 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 17:03:35,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-31 17:03:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:35,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:03:35,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:03:35,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-31 17:03:35,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216381544] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:35,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:35,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2024-01-31 17:03:35,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114430799] [2024-01-31 17:03:35,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:35,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:03:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:03:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:03:35,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-31 17:03:35,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 184 transitions, 2359 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:35,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:35,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-31 17:03:35,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:37,044 INFO L124 PetriNetUnfolderBase]: 4300/8729 cut-off events. [2024-01-31 17:03:37,044 INFO L125 PetriNetUnfolderBase]: For 176524/176524 co-relation queries the response was YES. [2024-01-31 17:03:37,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45903 conditions, 8729 events. 4300/8729 cut-off events. For 176524/176524 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 61518 event pairs, 104 based on Foata normal form. 166/8371 useless extension candidates. Maximal degree in co-relation 45825. Up to 1362 conditions per place. [2024-01-31 17:03:37,108 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 230 selfloop transitions, 211 changer transitions 30/479 dead transitions. [2024-01-31 17:03:37,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 479 transitions, 6982 flow [2024-01-31 17:03:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:03:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:03:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 317 transitions. [2024-01-31 17:03:37,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827205882352942 [2024-01-31 17:03:37,109 INFO L175 Difference]: Start difference. First operand has 237 places, 184 transitions, 2359 flow. Second operand 16 states and 317 transitions. [2024-01-31 17:03:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 479 transitions, 6982 flow [2024-01-31 17:03:37,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 479 transitions, 5826 flow, removed 479 selfloop flow, removed 36 redundant places. [2024-01-31 17:03:37,237 INFO L231 Difference]: Finished difference. Result has 166 places, 294 transitions, 4472 flow [2024-01-31 17:03:37,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4472, PETRI_PLACES=166, PETRI_TRANSITIONS=294} [2024-01-31 17:03:37,238 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2024-01-31 17:03:37,238 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 294 transitions, 4472 flow [2024-01-31 17:03:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:37,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:37,238 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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 17:03:37,251 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 17:03:37,445 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,SelfDestructingSolverStorable15 [2024-01-31 17:03:37,445 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:37,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -324445596, now seen corresponding path program 7 times [2024-01-31 17:03:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:37,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602884519] [2024-01-31 17:03:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:38,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602884519] [2024-01-31 17:03:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602884519] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415242425] [2024-01-31 17:03:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:03:38,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:38,349 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 17:03:38,364 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 17:03:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:38,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-31 17:03:38,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:39,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:39,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:39,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-01-31 17:03:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:40,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415242425] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:40,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:40,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-01-31 17:03:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400040227] [2024-01-31 17:03:40,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:40,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-01-31 17:03:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-01-31 17:03:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2024-01-31 17:03:40,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:40,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 294 transitions, 4472 flow. Second operand has 47 states, 47 states have (on average 11.936170212765957) internal successors, (561), 47 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:40,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:40,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:40,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:44,007 INFO L124 PetriNetUnfolderBase]: 4045/9291 cut-off events. [2024-01-31 17:03:44,008 INFO L125 PetriNetUnfolderBase]: For 55552/55864 co-relation queries the response was YES. [2024-01-31 17:03:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41605 conditions, 9291 events. 4045/9291 cut-off events. For 55552/55864 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 74496 event pairs, 502 based on Foata normal form. 307/8980 useless extension candidates. Maximal degree in co-relation 41548. Up to 3266 conditions per place. [2024-01-31 17:03:44,061 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 190 selfloop transitions, 300 changer transitions 171/679 dead transitions. [2024-01-31 17:03:44,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 679 transitions, 8652 flow [2024-01-31 17:03:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-01-31 17:03:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-01-31 17:03:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 981 transitions. [2024-01-31 17:03:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808823529411765 [2024-01-31 17:03:44,063 INFO L175 Difference]: Start difference. First operand has 166 places, 294 transitions, 4472 flow. Second operand 60 states and 981 transitions. [2024-01-31 17:03:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 679 transitions, 8652 flow [2024-01-31 17:03:44,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 679 transitions, 7967 flow, removed 217 selfloop flow, removed 5 redundant places. [2024-01-31 17:03:44,289 INFO L231 Difference]: Finished difference. Result has 236 places, 371 transitions, 6114 flow [2024-01-31 17:03:44,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3702, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=6114, PETRI_PLACES=236, PETRI_TRANSITIONS=371} [2024-01-31 17:03:44,289 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 203 predicate places. [2024-01-31 17:03:44,289 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 371 transitions, 6114 flow [2024-01-31 17:03:44,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.936170212765957) internal successors, (561), 47 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:44,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:44,290 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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 17:03:44,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:44,490 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,SelfDestructingSolverStorable16 [2024-01-31 17:03:44,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:44,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -447465840, now seen corresponding path program 8 times [2024-01-31 17:03:44,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:44,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096818559] [2024-01-31 17:03:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:45,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096818559] [2024-01-31 17:03:45,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096818559] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:45,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242933239] [2024-01-31 17:03:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:45,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:45,365 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 17:03:45,366 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 17:03:45,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:45,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 17:03:45,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:46,150 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-01-31 17:03:46,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-01-31 17:03:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:46,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:46,867 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-01-31 17:03:46,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2024-01-31 17:03:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242933239] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:47,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:47,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-01-31 17:03:47,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592252279] [2024-01-31 17:03:47,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:47,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-01-31 17:03:47,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:47,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-01-31 17:03:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2024-01-31 17:03:48,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:48,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 371 transitions, 6114 flow. Second operand has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:48,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:48,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:48,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:52,036 INFO L124 PetriNetUnfolderBase]: 3843/8825 cut-off events. [2024-01-31 17:03:52,036 INFO L125 PetriNetUnfolderBase]: For 100136/100380 co-relation queries the response was YES. [2024-01-31 17:03:52,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44849 conditions, 8825 events. 3843/8825 cut-off events. For 100136/100380 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 70672 event pairs, 944 based on Foata normal form. 246/8463 useless extension candidates. Maximal degree in co-relation 44779. Up to 4676 conditions per place. [2024-01-31 17:03:52,106 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 184 selfloop transitions, 253 changer transitions 107/562 dead transitions. [2024-01-31 17:03:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 562 transitions, 8216 flow [2024-01-31 17:03:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 17:03:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 17:03:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 644 transitions. [2024-01-31 17:03:52,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47352941176470587 [2024-01-31 17:03:52,108 INFO L175 Difference]: Start difference. First operand has 236 places, 371 transitions, 6114 flow. Second operand 40 states and 644 transitions. [2024-01-31 17:03:52,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 562 transitions, 8216 flow [2024-01-31 17:03:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 562 transitions, 7613 flow, removed 199 selfloop flow, removed 30 redundant places. [2024-01-31 17:03:52,304 INFO L231 Difference]: Finished difference. Result has 246 places, 369 transitions, 6117 flow [2024-01-31 17:03:52,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=6117, PETRI_PLACES=246, PETRI_TRANSITIONS=369} [2024-01-31 17:03:52,305 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 213 predicate places. [2024-01-31 17:03:52,305 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 369 transitions, 6117 flow [2024-01-31 17:03:52,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:52,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:52,305 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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 17:03:52,319 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 17:03:52,506 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,SelfDestructingSolverStorable17 [2024-01-31 17:03:52,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:52,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:52,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1951709800, now seen corresponding path program 9 times [2024-01-31 17:03:52,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182628332] [2024-01-31 17:03:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:52,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:53,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:53,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182628332] [2024-01-31 17:03:53,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182628332] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:53,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649696543] [2024-01-31 17:03:53,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:53,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:53,272 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 17:03:53,272 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 17:03:53,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-31 17:03:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:53,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 17:03:53,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:53,949 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-01-31 17:03:53,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-01-31 17:03:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:53,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:54,680 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-01-31 17:03:54,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2024-01-31 17:03:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:55,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649696543] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:55,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:55,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2024-01-31 17:03:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279962793] [2024-01-31 17:03:55,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:55,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-31 17:03:55,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-31 17:03:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2024-01-31 17:03:55,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:03:55,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 369 transitions, 6117 flow. Second operand has 45 states, 45 states have (on average 11.977777777777778) internal successors, (539), 45 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:55,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:55,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:03:55,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:58,852 INFO L124 PetriNetUnfolderBase]: 3782/8661 cut-off events. [2024-01-31 17:03:58,852 INFO L125 PetriNetUnfolderBase]: For 87610/87886 co-relation queries the response was YES. [2024-01-31 17:03:58,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43501 conditions, 8661 events. 3782/8661 cut-off events. For 87610/87886 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 68931 event pairs, 788 based on Foata normal form. 265/8328 useless extension candidates. Maximal degree in co-relation 43432. Up to 4031 conditions per place. [2024-01-31 17:03:58,931 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 195 selfloop transitions, 270 changer transitions 85/568 dead transitions. [2024-01-31 17:03:58,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 568 transitions, 8303 flow [2024-01-31 17:03:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 17:03:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 17:03:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 663 transitions. [2024-01-31 17:03:58,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-01-31 17:03:58,933 INFO L175 Difference]: Start difference. First operand has 246 places, 369 transitions, 6117 flow. Second operand 41 states and 663 transitions. [2024-01-31 17:03:58,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 568 transitions, 8303 flow [2024-01-31 17:03:59,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 568 transitions, 7781 flow, removed 73 selfloop flow, removed 26 redundant places. [2024-01-31 17:03:59,148 INFO L231 Difference]: Finished difference. Result has 248 places, 380 transitions, 6366 flow [2024-01-31 17:03:59,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6366, PETRI_PLACES=248, PETRI_TRANSITIONS=380} [2024-01-31 17:03:59,148 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 215 predicate places. [2024-01-31 17:03:59,148 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 380 transitions, 6366 flow [2024-01-31 17:03:59,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 11.977777777777778) internal successors, (539), 45 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:59,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:59,149 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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 17:03:59,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-31 17:03:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:59,350 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:03:59,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 63372972, now seen corresponding path program 10 times [2024-01-31 17:03:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:59,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901646192] [2024-01-31 17:03:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:00,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901646192] [2024-01-31 17:04:00,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901646192] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:00,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368899943] [2024-01-31 17:04:00,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:04:00,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:00,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:00,128 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 17:04:00,129 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 17:04:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:04:00,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:00,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:04:00,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:04:01,014 INFO L349 Elim1Store]: treesize reduction 50, result has 12.3 percent of original size [2024-01-31 17:04:01,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 24 [2024-01-31 17:04:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:01,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:01,933 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-01-31 17:04:01,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2024-01-31 17:04:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:02,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368899943] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:02,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:02,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-01-31 17:04:02,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871331470] [2024-01-31 17:04:02,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:02,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-01-31 17:04:02,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:02,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-01-31 17:04:02,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2024-01-31 17:04:03,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-31 17:04:03,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 380 transitions, 6366 flow. Second operand has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:03,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:03,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-31 17:04:03,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:04:08,260 INFO L124 PetriNetUnfolderBase]: 3819/8807 cut-off events. [2024-01-31 17:04:08,261 INFO L125 PetriNetUnfolderBase]: For 85752/85978 co-relation queries the response was YES. [2024-01-31 17:04:08,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44364 conditions, 8807 events. 3819/8807 cut-off events. For 85752/85978 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 71063 event pairs, 694 based on Foata normal form. 215/8412 useless extension candidates. Maximal degree in co-relation 44296. Up to 4031 conditions per place. [2024-01-31 17:04:08,344 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 226 selfloop transitions, 270 changer transitions 123/637 dead transitions. [2024-01-31 17:04:08,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 637 transitions, 8721 flow [2024-01-31 17:04:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-01-31 17:04:08,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-01-31 17:04:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 840 transitions. [2024-01-31 17:04:08,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844290657439446 [2024-01-31 17:04:08,345 INFO L175 Difference]: Start difference. First operand has 248 places, 380 transitions, 6366 flow. Second operand 51 states and 840 transitions. [2024-01-31 17:04:08,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 637 transitions, 8721 flow [2024-01-31 17:04:08,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 637 transitions, 8530 flow, removed 36 selfloop flow, removed 23 redundant places. [2024-01-31 17:04:08,587 INFO L231 Difference]: Finished difference. Result has 276 places, 378 transitions, 6691 flow [2024-01-31 17:04:08,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6193, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=6691, PETRI_PLACES=276, PETRI_TRANSITIONS=378} [2024-01-31 17:04:08,588 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 243 predicate places. [2024-01-31 17:04:08,588 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 378 transitions, 6691 flow [2024-01-31 17:04:08,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:08,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:04:08,589 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 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 17:04:08,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:04:08,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:08,789 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:04:08,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:04:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2000042402, now seen corresponding path program 11 times [2024-01-31 17:04:08,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:04:08,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075544931] [2024-01-31 17:04:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:04:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:04:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:04:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:04:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:04:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075544931] [2024-01-31 17:04:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075544931] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:04:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720387740] [2024-01-31 17:04:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:04:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:04:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:04:09,529 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 17:04:09,555 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 17:04:09,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:04:09,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:04:09,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 17:04:09,626 INFO L285 TraceCheckSpWp]: Computing forward predicates...