./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i --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/triangular-longest-2.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/pthread/triangular-longest-2.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/triangular-longest-2.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 17:31:37,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:31:37,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:31:37,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:31:37,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:31:37,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:31:37,645 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:31:37,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:31:37,646 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:31:37,650 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:31:37,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:31:37,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:31:37,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:31:37,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:31:37,653 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:31:37,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:31:37,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:31:37,654 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:31:37,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:31:37,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:31:37,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:31:37,656 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:31:37,656 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:31:37,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:31:37,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:31:37,657 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:31:37,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:31:37,657 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:31:37,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:31:37,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:31:37,659 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:31:37,659 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:31:37,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:31:37,660 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:31:37,660 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:31:37,661 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:31:37,661 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:31:37,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:31:37,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:31:37,666 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:31:37,667 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:31:37,667 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:31:37,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:31:37,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:31:37,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:31:37,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:31:37,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:31:37,954 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:31:37,954 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:31:37,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2024-01-31 17:31:39,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:31:39,434 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:31:39,438 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2024-01-31 17:31:39,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1603cf066/768ad406bb2d400c8594df80212799b8/FLAGaff817e4e [2024-01-31 17:31:39,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1603cf066/768ad406bb2d400c8594df80212799b8 [2024-01-31 17:31:39,475 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:31:39,482 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:31:39,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/triangular-longest-2.yml/witness.yml [2024-01-31 17:31:39,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:31:39,630 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:31:39,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:31:39,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:31:39,636 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:31:39,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:31:39" (1/2) ... [2024-01-31 17:31:39,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59448f33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:31:39, skipping insertion in model container [2024-01-31 17:31:39,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:31:39" (1/2) ... [2024-01-31 17:31:39,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5b6c08e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:31:39, skipping insertion in model container [2024-01-31 17:31:39,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:31:39" (2/2) ... [2024-01-31 17:31:39,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59448f33 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:31:39, skipping insertion in model container [2024-01-31 17:31:39,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:31:39" (2/2) ... [2024-01-31 17:31:39,642 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:31:39,770 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:31:39,772 INFO L98 nessWitnessExtractor]: Location invariant after [L719-L719] ((((((0 <= condI) && (3 <= i)) && (4 <= j)) && (condI <= 1)) && (i % 2 == 1)) && (j % 2 == 0)) && (condI == 0 || condI == 1) [2024-01-31 17:31:39,772 INFO L98 nessWitnessExtractor]: Location invariant after [L716-L716] (((((((3 <= i) && (4 <= j)) && ((4294967296LL + (long long )condI) + (long long )condJ >= 0LL)) && ((4294967295LL - (long long )condI) + (long long )condJ >= 0LL)) && ((4294967295LL + (long long )condI) - (long long )condJ >= 0LL)) && ((4294967294LL - (long long )condI) - (long long )condJ >= 0LL)) && (i % 2 == 1)) && (j % 2 == 0) [2024-01-31 17:31:39,772 INFO L98 nessWitnessExtractor]: Location invariant before [L722-L722] (((((0 <= condI) && (0 <= condJ)) && (condI <= 1)) && (condJ <= 1)) && (condI == 0 || condI == 1)) && (condJ == 0 || condJ == 1) [2024-01-31 17:31:39,818 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:31:40,177 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2024-01-31 17:31:40,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:31:40,190 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:31:40,223 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:31:40,224 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 17:31:40,225 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] Start Parsing Local [2024-01-31 17:31:40,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:31:40,303 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:31:40,304 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:31:40 WrapperNode [2024-01-31 17:31:40,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:31:40,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:31:40,306 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:31:40,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:31:40,313 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,346 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,366 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2024-01-31 17:31:40,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:31:40,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:31:40,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:31:40,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:31:40,376 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,377 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,383 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,407 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-31 17:31:40,407 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,407 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,422 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,426 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,431 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,433 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,437 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:31:40,440 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:31:40,440 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:31:40,441 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:31:40,442 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 05:31:40" (1/1) ... [2024-01-31 17:31:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:31:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:40,473 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 17:31:40,502 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 17:31:40,520 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:31:40,521 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:31:40,521 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:31:40,521 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:31:40,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:31:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:31:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:31:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:31:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:31:40,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:31:40,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:31:40,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:31:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:31:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:31:40,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:31:40,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:31:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:31:40,526 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 17:31:40,648 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:31:40,649 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:31:40,784 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:31:40,784 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:31:40,883 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:31:40,884 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:31:40,884 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:31:40 BoogieIcfgContainer [2024-01-31 17:31:40,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:31:40,886 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:31:40,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:31:40,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:31:40,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:31:39" (1/4) ... [2024-01-31 17:31:40,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bd8bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:31:40, skipping insertion in model container [2024-01-31 17:31:40,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:31:39" (2/4) ... [2024-01-31 17:31:40,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bd8bad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:31:40, skipping insertion in model container [2024-01-31 17:31:40,905 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 05:31:40" (3/4) ... [2024-01-31 17:31:40,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bd8bad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:31:40, skipping insertion in model container [2024-01-31 17:31:40,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:31:40" (4/4) ... [2024-01-31 17:31:40,907 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2024-01-31 17:31:40,924 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:31:40,925 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-01-31 17:31:40,925 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:31:40,968 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-31 17:31:41,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 26 transitions, 60 flow [2024-01-31 17:31:41,085 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2024-01-31 17:31:41,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:31:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-31 17:31:41,089 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 26 transitions, 60 flow [2024-01-31 17:31:41,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 24 transitions, 54 flow [2024-01-31 17:31:41,100 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:31:41,106 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;@3f6dd611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:31:41,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:31:41,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:31:41,114 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-31 17:31:41,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 17:31:41,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:41,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:41,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:41,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:41,120 INFO L85 PathProgramCache]: Analyzing trace with hash 911678794, now seen corresponding path program 1 times [2024-01-31 17:31:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365453682] [2024-01-31 17:31:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:41,628 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 17:31:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365453682] [2024-01-31 17:31:41,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365453682] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:41,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:41,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:31:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353917336] [2024-01-31 17:31:41,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:31:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:31:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:31:41,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:41,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:31:41,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:41,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:41,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:41,936 INFO L124 PetriNetUnfolderBase]: 345/592 cut-off events. [2024-01-31 17:31:41,937 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:31:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 592 events. 345/592 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2430 event pairs, 70 based on Foata normal form. 12/591 useless extension candidates. Maximal degree in co-relation 1130. Up to 257 conditions per place. [2024-01-31 17:31:41,948 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 26 selfloop transitions, 4 changer transitions 22/56 dead transitions. [2024-01-31 17:31:41,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 222 flow [2024-01-31 17:31:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:31:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:31:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-01-31 17:31:41,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-31 17:31:41,963 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 54 flow. Second operand 6 states and 91 transitions. [2024-01-31 17:31:41,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 222 flow [2024-01-31 17:31:41,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:31:41,971 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 75 flow [2024-01-31 17:31:41,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=75, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-01-31 17:31:41,978 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2024-01-31 17:31:41,978 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 75 flow [2024-01-31 17:31:41,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:31:41,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:41,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:41,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:31:41,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash 923729954, now seen corresponding path program 1 times [2024-01-31 17:31:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:41,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193768828] [2024-01-31 17:31:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:42,157 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 17:31:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193768828] [2024-01-31 17:31:42,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193768828] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:42,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:31:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214385301] [2024-01-31 17:31:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:31:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:31:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:31:42,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:42,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 75 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 17:31:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:42,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:42,390 INFO L124 PetriNetUnfolderBase]: 454/822 cut-off events. [2024-01-31 17:31:42,391 INFO L125 PetriNetUnfolderBase]: For 297/303 co-relation queries the response was YES. [2024-01-31 17:31:42,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 822 events. 454/822 cut-off events. For 297/303 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3615 event pairs, 71 based on Foata normal form. 33/854 useless extension candidates. Maximal degree in co-relation 1825. Up to 279 conditions per place. [2024-01-31 17:31:42,396 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 50 selfloop transitions, 9 changer transitions 20/83 dead transitions. [2024-01-31 17:31:42,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 397 flow [2024-01-31 17:31:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:31:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:31:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-01-31 17:31:42,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-31 17:31:42,399 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 75 flow. Second operand 9 states and 130 transitions. [2024-01-31 17:31:42,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 397 flow [2024-01-31 17:31:42,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 83 transitions, 381 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 17:31:42,404 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 160 flow [2024-01-31 17:31:42,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-01-31 17:31:42,405 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-01-31 17:31:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 160 flow [2024-01-31 17:31:42,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 17:31:42,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:42,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:31:42,428 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:42,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1440305894, now seen corresponding path program 2 times [2024-01-31 17:31:42,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:42,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820864978] [2024-01-31 17:31:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:42,627 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 17:31:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820864978] [2024-01-31 17:31:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820864978] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:42,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:42,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:31:42,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843201426] [2024-01-31 17:31:42,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:31:42,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:31:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:31:42,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:42,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 17:31:42,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:42,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:42,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:42,821 INFO L124 PetriNetUnfolderBase]: 346/642 cut-off events. [2024-01-31 17:31:42,822 INFO L125 PetriNetUnfolderBase]: For 1037/1049 co-relation queries the response was YES. [2024-01-31 17:31:42,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1813 conditions, 642 events. 346/642 cut-off events. For 1037/1049 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2731 event pairs, 71 based on Foata normal form. 57/698 useless extension candidates. Maximal degree in co-relation 1792. Up to 261 conditions per place. [2024-01-31 17:31:42,826 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 39 selfloop transitions, 9 changer transitions 28/80 dead transitions. [2024-01-31 17:31:42,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 502 flow [2024-01-31 17:31:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:31:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:31:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-01-31 17:31:42,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-01-31 17:31:42,828 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 160 flow. Second operand 8 states and 112 transitions. [2024-01-31 17:31:42,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 502 flow [2024-01-31 17:31:42,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 494 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 17:31:42,833 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 214 flow [2024-01-31 17:31:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2024-01-31 17:31:42,834 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2024-01-31 17:31:42,834 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 214 flow [2024-01-31 17:31:42,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 17:31:42,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:42,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:42,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:31:42,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:42,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash 568893205, now seen corresponding path program 1 times [2024-01-31 17:31:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:42,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089942080] [2024-01-31 17:31:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:42,933 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 17:31:42,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089942080] [2024-01-31 17:31:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089942080] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:42,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:31:42,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536420058] [2024-01-31 17:31:42,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:42,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:31:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:42,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:31:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:31:42,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:42,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:42,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:42,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:42,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:43,155 INFO L124 PetriNetUnfolderBase]: 355/654 cut-off events. [2024-01-31 17:31:43,155 INFO L125 PetriNetUnfolderBase]: For 1781/1793 co-relation queries the response was YES. [2024-01-31 17:31:43,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 654 events. 355/654 cut-off events. For 1781/1793 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2776 event pairs, 80 based on Foata normal form. 30/683 useless extension candidates. Maximal degree in co-relation 2001. Up to 264 conditions per place. [2024-01-31 17:31:43,160 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 47 selfloop transitions, 16 changer transitions 24/91 dead transitions. [2024-01-31 17:31:43,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 613 flow [2024-01-31 17:31:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:31:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:31:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-01-31 17:31:43,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513986013986014 [2024-01-31 17:31:43,164 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 214 flow. Second operand 11 states and 147 transitions. [2024-01-31 17:31:43,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 613 flow [2024-01-31 17:31:43,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 546 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-01-31 17:31:43,172 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 283 flow [2024-01-31 17:31:43,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2024-01-31 17:31:43,173 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 28 predicate places. [2024-01-31 17:31:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 283 flow [2024-01-31 17:31:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:43,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:43,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:31:43,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:43,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1555242297, now seen corresponding path program 2 times [2024-01-31 17:31:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:43,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350585603] [2024-01-31 17:31:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:43,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:43,297 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 17:31:43,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:43,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350585603] [2024-01-31 17:31:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350585603] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:31:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034202386] [2024-01-31 17:31:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:31:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:31:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:31:43,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:43,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 283 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:43,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:43,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:43,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:43,545 INFO L124 PetriNetUnfolderBase]: 580/1058 cut-off events. [2024-01-31 17:31:43,545 INFO L125 PetriNetUnfolderBase]: For 3585/3603 co-relation queries the response was YES. [2024-01-31 17:31:43,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1058 events. 580/1058 cut-off events. For 3585/3603 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4944 event pairs, 53 based on Foata normal form. 45/1102 useless extension candidates. Maximal degree in co-relation 3379. Up to 286 conditions per place. [2024-01-31 17:31:43,554 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 61 selfloop transitions, 20 changer transitions 23/108 dead transitions. [2024-01-31 17:31:43,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 108 transitions, 789 flow [2024-01-31 17:31:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:31:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:31:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-01-31 17:31:43,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-01-31 17:31:43,560 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 283 flow. Second operand 11 states and 156 transitions. [2024-01-31 17:31:43,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 108 transitions, 789 flow [2024-01-31 17:31:43,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 108 transitions, 723 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-01-31 17:31:43,574 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 380 flow [2024-01-31 17:31:43,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=380, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2024-01-31 17:31:43,575 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2024-01-31 17:31:43,575 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 380 flow [2024-01-31 17:31:43,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:43,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:43,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:43,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:31:43,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:43,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:43,577 INFO L85 PathProgramCache]: Analyzing trace with hash -760869871, now seen corresponding path program 3 times [2024-01-31 17:31:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939839089] [2024-01-31 17:31:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:43,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:43,685 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 17:31:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:43,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939839089] [2024-01-31 17:31:43,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939839089] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:43,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:31:43,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:31:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990893027] [2024-01-31 17:31:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:43,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 17:31:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 17:31:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-01-31 17:31:43,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:43,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:43,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:43,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:43,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:43,903 INFO L124 PetriNetUnfolderBase]: 463/866 cut-off events. [2024-01-31 17:31:43,903 INFO L125 PetriNetUnfolderBase]: For 5023/5041 co-relation queries the response was YES. [2024-01-31 17:31:43,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 866 events. 463/866 cut-off events. For 5023/5041 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3933 event pairs, 77 based on Foata normal form. 63/928 useless extension candidates. Maximal degree in co-relation 3229. Up to 250 conditions per place. [2024-01-31 17:31:43,909 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 20 changer transitions 31/100 dead transitions. [2024-01-31 17:31:43,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 902 flow [2024-01-31 17:31:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:31:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:31:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-01-31 17:31:43,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-01-31 17:31:43,911 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 380 flow. Second operand 10 states and 136 transitions. [2024-01-31 17:31:43,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 902 flow [2024-01-31 17:31:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 833 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-01-31 17:31:43,928 INFO L231 Difference]: Finished difference. Result has 73 places, 48 transitions, 428 flow [2024-01-31 17:31:43,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=428, PETRI_PLACES=73, PETRI_TRANSITIONS=48} [2024-01-31 17:31:43,930 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 45 predicate places. [2024-01-31 17:31:43,930 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 48 transitions, 428 flow [2024-01-31 17:31:43,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 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 17:31:43,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:43,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:43,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:31:43,931 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:43,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1192303582, now seen corresponding path program 1 times [2024-01-31 17:31:43,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:43,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008909957] [2024-01-31 17:31:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:31:44,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:44,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008909957] [2024-01-31 17:31:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008909957] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:44,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133167183] [2024-01-31 17:31:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:44,080 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 17:31:44,083 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 17:31:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:44,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:31:44,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:31:44,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:31:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133167183] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:44,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:44,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-01-31 17:31:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292287527] [2024-01-31 17:31:44,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:31:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:31:44,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:31:44,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:44,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 48 transitions, 428 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 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 17:31:44,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:44,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:44,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:44,869 INFO L124 PetriNetUnfolderBase]: 661/1205 cut-off events. [2024-01-31 17:31:44,870 INFO L125 PetriNetUnfolderBase]: For 9439/9457 co-relation queries the response was YES. [2024-01-31 17:31:44,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4908 conditions, 1205 events. 661/1205 cut-off events. For 9439/9457 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5261 event pairs, 65 based on Foata normal form. 63/1267 useless extension candidates. Maximal degree in co-relation 4873. Up to 204 conditions per place. [2024-01-31 17:31:44,878 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 67 selfloop transitions, 35 changer transitions 56/162 dead transitions. [2024-01-31 17:31:44,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 162 transitions, 1518 flow [2024-01-31 17:31:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:31:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:31:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 256 transitions. [2024-01-31 17:31:44,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182186234817814 [2024-01-31 17:31:44,881 INFO L175 Difference]: Start difference. First operand has 73 places, 48 transitions, 428 flow. Second operand 19 states and 256 transitions. [2024-01-31 17:31:44,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 162 transitions, 1518 flow [2024-01-31 17:31:44,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 162 transitions, 1394 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-01-31 17:31:44,932 INFO L231 Difference]: Finished difference. Result has 90 places, 64 transitions, 751 flow [2024-01-31 17:31:44,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=751, PETRI_PLACES=90, PETRI_TRANSITIONS=64} [2024-01-31 17:31:44,933 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-01-31 17:31:44,933 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 64 transitions, 751 flow [2024-01-31 17:31:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 states have internal predecessors, (107), 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 17:31:44,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:44,934 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:44,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:31:45,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:45,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:45,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1947638786, now seen corresponding path program 1 times [2024-01-31 17:31:45,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:45,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243286036] [2024-01-31 17:31:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243286036] [2024-01-31 17:31:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243286036] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:45,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175109171] [2024-01-31 17:31:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:45,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:45,333 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 17:31:45,335 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 17:31:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:45,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:31:45,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:45,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:45,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175109171] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:45,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:45,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 17:31:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865111244] [2024-01-31 17:31:45,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:31:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:31:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:31:45,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 64 transitions, 751 flow. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 17:31:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:46,263 INFO L124 PetriNetUnfolderBase]: 859/1614 cut-off events. [2024-01-31 17:31:46,264 INFO L125 PetriNetUnfolderBase]: For 19895/19913 co-relation queries the response was YES. [2024-01-31 17:31:46,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7454 conditions, 1614 events. 859/1614 cut-off events. For 19895/19913 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7141 event pairs, 227 based on Foata normal form. 99/1712 useless extension candidates. Maximal degree in co-relation 7412. Up to 783 conditions per place. [2024-01-31 17:31:46,275 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 96 selfloop transitions, 25 changer transitions 89/214 dead transitions. [2024-01-31 17:31:46,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 214 transitions, 2437 flow [2024-01-31 17:31:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:31:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:31:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 327 transitions. [2024-01-31 17:31:46,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030769230769231 [2024-01-31 17:31:46,277 INFO L175 Difference]: Start difference. First operand has 90 places, 64 transitions, 751 flow. Second operand 25 states and 327 transitions. [2024-01-31 17:31:46,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 214 transitions, 2437 flow [2024-01-31 17:31:46,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 214 transitions, 1928 flow, removed 241 selfloop flow, removed 10 redundant places. [2024-01-31 17:31:46,302 INFO L231 Difference]: Finished difference. Result has 118 places, 78 transitions, 840 flow [2024-01-31 17:31:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=840, PETRI_PLACES=118, PETRI_TRANSITIONS=78} [2024-01-31 17:31:46,303 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 90 predicate places. [2024-01-31 17:31:46,303 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 78 transitions, 840 flow [2024-01-31 17:31:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 17:31:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:46,323 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 17:31:46,523 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,SelfDestructingSolverStorable7 [2024-01-31 17:31:46,523 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:46,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash 267514216, now seen corresponding path program 2 times [2024-01-31 17:31:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:46,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391236621] [2024-01-31 17:31:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:46,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:46,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391236621] [2024-01-31 17:31:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391236621] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:46,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378198340] [2024-01-31 17:31:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:31:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:46,703 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 17:31:46,716 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 17:31:46,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:31:46,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:31:46,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:31:46,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:46,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378198340] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:47,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-31 17:31:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841790967] [2024-01-31 17:31:47,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:31:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:31:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:31:47,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:47,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 78 transitions, 840 flow. Second operand has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 17:31:47,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:47,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:47,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:48,071 INFO L124 PetriNetUnfolderBase]: 1543/2904 cut-off events. [2024-01-31 17:31:48,071 INFO L125 PetriNetUnfolderBase]: For 68914/68932 co-relation queries the response was YES. [2024-01-31 17:31:48,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15378 conditions, 2904 events. 1543/2904 cut-off events. For 68914/68932 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 15642 event pairs, 148 based on Foata normal form. 99/3002 useless extension candidates. Maximal degree in co-relation 15323. Up to 528 conditions per place. [2024-01-31 17:31:48,101 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 133 selfloop transitions, 80 changer transitions 91/308 dead transitions. [2024-01-31 17:31:48,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 308 transitions, 3916 flow [2024-01-31 17:31:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 17:31:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 17:31:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 431 transitions. [2024-01-31 17:31:48,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180288461538461 [2024-01-31 17:31:48,104 INFO L175 Difference]: Start difference. First operand has 118 places, 78 transitions, 840 flow. Second operand 32 states and 431 transitions. [2024-01-31 17:31:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 308 transitions, 3916 flow [2024-01-31 17:31:48,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 308 transitions, 3322 flow, removed 289 selfloop flow, removed 13 redundant places. [2024-01-31 17:31:48,194 INFO L231 Difference]: Finished difference. Result has 150 places, 121 transitions, 1647 flow [2024-01-31 17:31:48,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1647, PETRI_PLACES=150, PETRI_TRANSITIONS=121} [2024-01-31 17:31:48,195 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 122 predicate places. [2024-01-31 17:31:48,195 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 121 transitions, 1647 flow [2024-01-31 17:31:48,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.411764705882353) internal successors, (143), 17 states have internal predecessors, (143), 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 17:31:48,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:48,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:48,215 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 17:31:48,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:48,409 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:48,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:48,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1363208996, now seen corresponding path program 3 times [2024-01-31 17:31:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:48,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268820770] [2024-01-31 17:31:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:48,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:48,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268820770] [2024-01-31 17:31:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268820770] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:48,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868163093] [2024-01-31 17:31:48,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:31:48,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:48,543 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 17:31:48,568 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 17:31:48,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:31:48,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:31:48,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 17:31:48,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-01-31 17:31:48,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:31:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868163093] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:31:48,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:31:48,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-01-31 17:31:48,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051456177] [2024-01-31 17:31:48,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:31:48,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:31:48,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:31:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:31:48,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:48,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 121 transitions, 1647 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 17:31:48,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:48,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:48,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:49,461 INFO L124 PetriNetUnfolderBase]: 1642/3183 cut-off events. [2024-01-31 17:31:49,461 INFO L125 PetriNetUnfolderBase]: For 120706/120712 co-relation queries the response was YES. [2024-01-31 17:31:49,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19511 conditions, 3183 events. 1642/3183 cut-off events. For 120706/120712 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 18420 event pairs, 290 based on Foata normal form. 87/3269 useless extension candidates. Maximal degree in co-relation 19441. Up to 1011 conditions per place. [2024-01-31 17:31:49,503 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 94 selfloop transitions, 128 changer transitions 0/226 dead transitions. [2024-01-31 17:31:49,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 226 transitions, 3947 flow [2024-01-31 17:31:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:31:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:31:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 182 transitions. [2024-01-31 17:31:49,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-01-31 17:31:49,505 INFO L175 Difference]: Start difference. First operand has 150 places, 121 transitions, 1647 flow. Second operand 13 states and 182 transitions. [2024-01-31 17:31:49,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 226 transitions, 3947 flow [2024-01-31 17:31:49,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 226 transitions, 3231 flow, removed 342 selfloop flow, removed 17 redundant places. [2024-01-31 17:31:49,794 INFO L231 Difference]: Finished difference. Result has 146 places, 168 transitions, 2949 flow [2024-01-31 17:31:49,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2949, PETRI_PLACES=146, PETRI_TRANSITIONS=168} [2024-01-31 17:31:49,795 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-01-31 17:31:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 168 transitions, 2949 flow [2024-01-31 17:31:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 17:31:49,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:49,815 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 17:31:50,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:50,015 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:50,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1908371991, now seen corresponding path program 1 times [2024-01-31 17:31:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:50,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214443331] [2024-01-31 17:31:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214443331] [2024-01-31 17:31:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214443331] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113040106] [2024-01-31 17:31:50,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:50,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:50,174 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 17:31:50,176 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 17:31:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:50,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:31:50,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:50,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:31:50,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113040106] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:50,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-01-31 17:31:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002502933] [2024-01-31 17:31:50,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:31:50,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:31:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:31:50,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 17:31:50,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 168 transitions, 2949 flow. Second operand has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 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 17:31:50,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:50,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 17:31:50,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:52,998 INFO L124 PetriNetUnfolderBase]: 3712/6690 cut-off events. [2024-01-31 17:31:52,999 INFO L125 PetriNetUnfolderBase]: For 324412/324418 co-relation queries the response was YES. [2024-01-31 17:31:53,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47232 conditions, 6690 events. 3712/6690 cut-off events. For 324412/324418 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 41112 event pairs, 375 based on Foata normal form. 321/7010 useless extension candidates. Maximal degree in co-relation 47162. Up to 1362 conditions per place. [2024-01-31 17:31:53,077 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 303 selfloop transitions, 180 changer transitions 137/623 dead transitions. [2024-01-31 17:31:53,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 623 transitions, 12633 flow [2024-01-31 17:31:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 17:31:53,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 17:31:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 597 transitions. [2024-01-31 17:31:53,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-01-31 17:31:53,081 INFO L175 Difference]: Start difference. First operand has 146 places, 168 transitions, 2949 flow. Second operand 48 states and 597 transitions. [2024-01-31 17:31:53,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 623 transitions, 12633 flow [2024-01-31 17:31:53,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 623 transitions, 9503 flow, removed 1562 selfloop flow, removed 3 redundant places. [2024-01-31 17:31:53,764 INFO L231 Difference]: Finished difference. Result has 223 places, 260 transitions, 5589 flow [2024-01-31 17:31:53,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5589, PETRI_PLACES=223, PETRI_TRANSITIONS=260} [2024-01-31 17:31:53,765 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 195 predicate places. [2024-01-31 17:31:53,765 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 260 transitions, 5589 flow [2024-01-31 17:31:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.090909090909091) internal successors, (156), 22 states have internal predecessors, (156), 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 17:31:53,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:53,766 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:53,778 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 17:31:53,966 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 17:31:53,967 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:53,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1941881517, now seen corresponding path program 4 times [2024-01-31 17:31:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874005881] [2024-01-31 17:31:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:54,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874005881] [2024-01-31 17:31:54,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874005881] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:54,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160836276] [2024-01-31 17:31:54,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:31:54,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:54,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:54,143 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 17:31:54,161 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 17:31:54,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:31:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:31:54,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:31:54,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:54,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160836276] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:54,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-01-31 17:31:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587112206] [2024-01-31 17:31:54,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:31:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:31:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:31:54,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 260 transitions, 5589 flow. Second operand has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 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 17:31:54,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:54,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:54,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:56,777 INFO L124 PetriNetUnfolderBase]: 3622/6793 cut-off events. [2024-01-31 17:31:56,778 INFO L125 PetriNetUnfolderBase]: For 384570/384592 co-relation queries the response was YES. [2024-01-31 17:31:56,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50786 conditions, 6793 events. 3622/6793 cut-off events. For 384570/384592 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 44196 event pairs, 1119 based on Foata normal form. 285/7069 useless extension candidates. Maximal degree in co-relation 50684. Up to 3403 conditions per place. [2024-01-31 17:31:56,865 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 253 selfloop transitions, 109 changer transitions 130/496 dead transitions. [2024-01-31 17:31:56,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 496 transitions, 11458 flow [2024-01-31 17:31:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:31:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:31:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 405 transitions. [2024-01-31 17:31:56,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024813895781638 [2024-01-31 17:31:56,867 INFO L175 Difference]: Start difference. First operand has 223 places, 260 transitions, 5589 flow. Second operand 31 states and 405 transitions. [2024-01-31 17:31:56,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 496 transitions, 11458 flow [2024-01-31 17:31:57,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 496 transitions, 8148 flow, removed 1594 selfloop flow, removed 22 redundant places. [2024-01-31 17:31:57,945 INFO L231 Difference]: Finished difference. Result has 247 places, 296 transitions, 5272 flow [2024-01-31 17:31:57,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5272, PETRI_PLACES=247, PETRI_TRANSITIONS=296} [2024-01-31 17:31:57,946 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 219 predicate places. [2024-01-31 17:31:57,946 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 296 transitions, 5272 flow [2024-01-31 17:31:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.368421052631579) internal successors, (159), 19 states have internal predecessors, (159), 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 17:31:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:31:57,947 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:31:57,960 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 17:31:58,150 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 17:31:58,150 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:31:58,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:31:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1226485695, now seen corresponding path program 5 times [2024-01-31 17:31:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:31:58,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8101805] [2024-01-31 17:31:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:31:58,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:31:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:31:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:31:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8101805] [2024-01-31 17:31:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8101805] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:31:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601194722] [2024-01-31 17:31:58,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:31:58,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:31:58,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:31:58,296 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 17:31:58,314 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 17:31:58,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-31 17:31:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:31:58,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:31:58,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:31:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:58,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:31:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:31:58,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601194722] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:31:58,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:31:58,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-01-31 17:31:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749394372] [2024-01-31 17:31:58,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:31:58,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:31:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:31:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:31:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:31:58,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:31:58,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 296 transitions, 5272 flow. Second operand has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 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 17:31:58,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:31:58,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:31:58,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:01,513 INFO L124 PetriNetUnfolderBase]: 4855/9220 cut-off events. [2024-01-31 17:32:01,513 INFO L125 PetriNetUnfolderBase]: For 278930/278952 co-relation queries the response was YES. [2024-01-31 17:32:01,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55649 conditions, 9220 events. 4855/9220 cut-off events. For 278930/278952 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 63694 event pairs, 526 based on Foata normal form. 573/9781 useless extension candidates. Maximal degree in co-relation 55538. Up to 1941 conditions per place. [2024-01-31 17:32:01,604 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 198 selfloop transitions, 256 changer transitions 199/657 dead transitions. [2024-01-31 17:32:01,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 657 transitions, 12172 flow [2024-01-31 17:32:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:32:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:32:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 502 transitions. [2024-01-31 17:32:01,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080971659919028 [2024-01-31 17:32:01,613 INFO L175 Difference]: Start difference. First operand has 247 places, 296 transitions, 5272 flow. Second operand 38 states and 502 transitions. [2024-01-31 17:32:01,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 657 transitions, 12172 flow [2024-01-31 17:32:02,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 657 transitions, 11452 flow, removed 311 selfloop flow, removed 27 redundant places. [2024-01-31 17:32:02,773 INFO L231 Difference]: Finished difference. Result has 267 places, 366 transitions, 7425 flow [2024-01-31 17:32:02,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4813, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7425, PETRI_PLACES=267, PETRI_TRANSITIONS=366} [2024-01-31 17:32:02,774 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 239 predicate places. [2024-01-31 17:32:02,774 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 366 transitions, 7425 flow [2024-01-31 17:32:02,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 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 17:32:02,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:02,774 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:02,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:32:02,982 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 17:32:02,983 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:02,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:02,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1461297430, now seen corresponding path program 6 times [2024-01-31 17:32:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355120451] [2024-01-31 17:32:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:03,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355120451] [2024-01-31 17:32:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355120451] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824953955] [2024-01-31 17:32:03,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:32:03,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:03,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:03,169 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 17:32:03,188 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 17:32:03,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:32:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:32:03,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2024-01-31 17:32:03,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-01-31 17:32:03,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:32:03,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824953955] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:32:03,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:32:03,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 18 [2024-01-31 17:32:03,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164734287] [2024-01-31 17:32:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:32:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:32:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:32:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:32:03,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:32:03,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 366 transitions, 7425 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 17:32:03,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:03,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:32:03,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:05,940 INFO L124 PetriNetUnfolderBase]: 5182/10031 cut-off events. [2024-01-31 17:32:05,940 INFO L125 PetriNetUnfolderBase]: For 351172/351192 co-relation queries the response was YES. [2024-01-31 17:32:06,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62390 conditions, 10031 events. 5182/10031 cut-off events. For 351172/351192 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 71605 event pairs, 2184 based on Foata normal form. 141/10154 useless extension candidates. Maximal degree in co-relation 62276. Up to 5778 conditions per place. [2024-01-31 17:32:06,054 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 322 selfloop transitions, 171 changer transitions 37/534 dead transitions. [2024-01-31 17:32:06,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 534 transitions, 11711 flow [2024-01-31 17:32:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:32:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:32:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 155 transitions. [2024-01-31 17:32:06,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541958041958042 [2024-01-31 17:32:06,056 INFO L175 Difference]: Start difference. First operand has 267 places, 366 transitions, 7425 flow. Second operand 11 states and 155 transitions. [2024-01-31 17:32:06,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 534 transitions, 11711 flow [2024-01-31 17:32:07,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 534 transitions, 10518 flow, removed 535 selfloop flow, removed 23 redundant places. [2024-01-31 17:32:07,752 INFO L231 Difference]: Finished difference. Result has 251 places, 427 transitions, 8796 flow [2024-01-31 17:32:07,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8796, PETRI_PLACES=251, PETRI_TRANSITIONS=427} [2024-01-31 17:32:07,753 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 223 predicate places. [2024-01-31 17:32:07,753 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 427 transitions, 8796 flow [2024-01-31 17:32:07,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 17:32:07,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:07,754 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:07,765 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 17:32:07,954 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 17:32:07,955 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:07,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1024615527, now seen corresponding path program 7 times [2024-01-31 17:32:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086290949] [2024-01-31 17:32:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086290949] [2024-01-31 17:32:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086290949] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486676797] [2024-01-31 17:32:08,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:32:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:08,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:08,261 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 17:32:08,278 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 17:32:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:08,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 17:32:08,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:08,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:08,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486676797] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:08,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:08,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-01-31 17:32:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825291821] [2024-01-31 17:32:08,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:08,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:32:08,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:32:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:32:08,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:32:08,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 427 transitions, 8796 flow. Second operand has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 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 17:32:08,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:08,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:32:08,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:13,054 INFO L124 PetriNetUnfolderBase]: 6556/12838 cut-off events. [2024-01-31 17:32:13,054 INFO L125 PetriNetUnfolderBase]: For 591387/591407 co-relation queries the response was YES. [2024-01-31 17:32:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87727 conditions, 12838 events. 6556/12838 cut-off events. For 591387/591407 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 88609 event pairs, 450 based on Foata normal form. 978/13795 useless extension candidates. Maximal degree in co-relation 87619. Up to 2733 conditions per place. [2024-01-31 17:32:13,185 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 255 selfloop transitions, 382 changer transitions 297/938 dead transitions. [2024-01-31 17:32:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 938 transitions, 20060 flow [2024-01-31 17:32:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-31 17:32:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-31 17:32:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 744 transitions. [2024-01-31 17:32:13,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-01-31 17:32:13,188 INFO L175 Difference]: Start difference. First operand has 251 places, 427 transitions, 8796 flow. Second operand 56 states and 744 transitions. [2024-01-31 17:32:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 938 transitions, 20060 flow [2024-01-31 17:32:15,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 938 transitions, 18906 flow, removed 577 selfloop flow, removed 7 redundant places. [2024-01-31 17:32:15,792 INFO L231 Difference]: Finished difference. Result has 314 places, 469 transitions, 11191 flow [2024-01-31 17:32:15,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8227, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=11191, PETRI_PLACES=314, PETRI_TRANSITIONS=469} [2024-01-31 17:32:15,799 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 286 predicate places. [2024-01-31 17:32:15,799 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 469 transitions, 11191 flow [2024-01-31 17:32:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.071428571428571) internal successors, (226), 28 states have internal predecessors, (226), 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 17:32:15,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:15,799 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:15,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:32:16,001 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 17:32:16,001 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:16,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1411694735, now seen corresponding path program 8 times [2024-01-31 17:32:16,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:16,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257693620] [2024-01-31 17:32:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:16,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:16,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257693620] [2024-01-31 17:32:16,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257693620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:16,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008104765] [2024-01-31 17:32:16,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:32:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:16,507 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 17:32:16,528 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 17:32:16,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:32:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:32:16,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:32:16,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:16,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:17,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008104765] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:17,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:17,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2024-01-31 17:32:17,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239436959] [2024-01-31 17:32:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:17,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-01-31 17:32:17,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:17,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-01-31 17:32:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2024-01-31 17:32:17,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:32:17,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 469 transitions, 11191 flow. Second operand has 43 states, 43 states have (on average 8.069767441860465) internal successors, (347), 43 states have internal predecessors, (347), 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 17:32:17,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:17,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:32:17,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:21,905 INFO L124 PetriNetUnfolderBase]: 6025/11909 cut-off events. [2024-01-31 17:32:21,905 INFO L125 PetriNetUnfolderBase]: For 586253/586259 co-relation queries the response was YES. [2024-01-31 17:32:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82116 conditions, 11909 events. 6025/11909 cut-off events. For 586253/586259 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 81000 event pairs, 2107 based on Foata normal form. 204/12092 useless extension candidates. Maximal degree in co-relation 81990. Up to 6667 conditions per place. [2024-01-31 17:32:22,218 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 477 selfloop transitions, 180 changer transitions 235/896 dead transitions. [2024-01-31 17:32:22,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 896 transitions, 20387 flow [2024-01-31 17:32:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-31 17:32:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-31 17:32:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 861 transitions. [2024-01-31 17:32:22,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49425947187141217 [2024-01-31 17:32:22,221 INFO L175 Difference]: Start difference. First operand has 314 places, 469 transitions, 11191 flow. Second operand 67 states and 861 transitions. [2024-01-31 17:32:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 896 transitions, 20387 flow [2024-01-31 17:32:24,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 896 transitions, 18310 flow, removed 925 selfloop flow, removed 28 redundant places. [2024-01-31 17:32:24,547 INFO L231 Difference]: Finished difference. Result has 375 places, 517 transitions, 11614 flow [2024-01-31 17:32:24,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9740, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=11614, PETRI_PLACES=375, PETRI_TRANSITIONS=517} [2024-01-31 17:32:24,548 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 347 predicate places. [2024-01-31 17:32:24,548 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 517 transitions, 11614 flow [2024-01-31 17:32:24,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.069767441860465) internal successors, (347), 43 states have internal predecessors, (347), 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 17:32:24,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:24,549 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:24,561 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 17:32:24,749 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 17:32:24,750 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:24,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1315509805, now seen corresponding path program 9 times [2024-01-31 17:32:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:24,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660590714] [2024-01-31 17:32:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:24,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660590714] [2024-01-31 17:32:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660590714] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100330931] [2024-01-31 17:32:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:32:25,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:25,209 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 17:32:25,210 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 17:32:25,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-01-31 17:32:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:32:25,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:32:25,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:25,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:26,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100330931] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:26,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:26,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2024-01-31 17:32:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846717264] [2024-01-31 17:32:26,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-01-31 17:32:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-01-31 17:32:26,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1544, Unknown=0, NotChecked=0, Total=1892 [2024-01-31 17:32:26,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:32:26,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 517 transitions, 11614 flow. Second operand has 44 states, 44 states have (on average 8.090909090909092) internal successors, (356), 44 states have internal predecessors, (356), 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 17:32:26,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:26,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:32:26,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:31,951 INFO L124 PetriNetUnfolderBase]: 6511/13044 cut-off events. [2024-01-31 17:32:31,951 INFO L125 PetriNetUnfolderBase]: For 825952/825958 co-relation queries the response was YES. [2024-01-31 17:32:32,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89672 conditions, 13044 events. 6511/13044 cut-off events. For 825952/825958 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 89347 event pairs, 1016 based on Foata normal form. 204/13227 useless extension candidates. Maximal degree in co-relation 89520. Up to 3076 conditions per place. [2024-01-31 17:32:32,411 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 329 selfloop transitions, 403 changer transitions 247/983 dead transitions. [2024-01-31 17:32:32,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 983 transitions, 21748 flow [2024-01-31 17:32:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-01-31 17:32:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-01-31 17:32:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 944 transitions. [2024-01-31 17:32:32,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49736564805057953 [2024-01-31 17:32:32,422 INFO L175 Difference]: Start difference. First operand has 375 places, 517 transitions, 11614 flow. Second operand 73 states and 944 transitions. [2024-01-31 17:32:32,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 983 transitions, 21748 flow [2024-01-31 17:32:35,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 983 transitions, 20942 flow, removed 339 selfloop flow, removed 40 redundant places. [2024-01-31 17:32:35,645 INFO L231 Difference]: Finished difference. Result has 427 places, 571 transitions, 13561 flow [2024-01-31 17:32:35,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=10908, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=13561, PETRI_PLACES=427, PETRI_TRANSITIONS=571} [2024-01-31 17:32:35,646 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 399 predicate places. [2024-01-31 17:32:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 571 transitions, 13561 flow [2024-01-31 17:32:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.090909090909092) internal successors, (356), 44 states have internal predecessors, (356), 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 17:32:35,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:35,647 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:35,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 17:32:35,858 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 17:32:35,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:35,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:35,859 INFO L85 PathProgramCache]: Analyzing trace with hash -845330261, now seen corresponding path program 10 times [2024-01-31 17:32:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:35,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649706748] [2024-01-31 17:32:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649706748] [2024-01-31 17:32:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649706748] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:36,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228518296] [2024-01-31 17:32:36,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:32:36,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:36,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:36,259 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 17:32:36,279 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 17:32:36,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:32:36,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:32:36,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:32:36,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:36,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228518296] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:36,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:36,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2024-01-31 17:32:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486522646] [2024-01-31 17:32:36,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-01-31 17:32:36,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:36,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-01-31 17:32:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2024-01-31 17:32:37,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-01-31 17:32:37,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 571 transitions, 13561 flow. Second operand has 43 states, 43 states have (on average 8.069767441860465) internal successors, (347), 43 states have internal predecessors, (347), 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 17:32:37,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:37,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-01-31 17:32:37,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:32:44,141 INFO L124 PetriNetUnfolderBase]: 8401/16926 cut-off events. [2024-01-31 17:32:44,142 INFO L125 PetriNetUnfolderBase]: For 1299369/1299375 co-relation queries the response was YES. [2024-01-31 17:32:44,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117834 conditions, 16926 events. 8401/16926 cut-off events. For 1299369/1299375 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 118395 event pairs, 526 based on Foata normal form. 519/17398 useless extension candidates. Maximal degree in co-relation 117666. Up to 3787 conditions per place. [2024-01-31 17:32:44,332 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 351 selfloop transitions, 605 changer transitions 287/1247 dead transitions. [2024-01-31 17:32:44,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 1247 transitions, 28219 flow [2024-01-31 17:32:44,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-01-31 17:32:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-01-31 17:32:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 1096 transitions. [2024-01-31 17:32:44,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078776645041705 [2024-01-31 17:32:44,334 INFO L175 Difference]: Start difference. First operand has 427 places, 571 transitions, 13561 flow. Second operand 83 states and 1096 transitions. [2024-01-31 17:32:44,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 1247 transitions, 28219 flow [2024-01-31 17:32:49,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1247 transitions, 26813 flow, removed 550 selfloop flow, removed 42 redundant places. [2024-01-31 17:32:49,191 INFO L231 Difference]: Finished difference. Result has 491 places, 699 transitions, 17020 flow [2024-01-31 17:32:49,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=12523, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=17020, PETRI_PLACES=491, PETRI_TRANSITIONS=699} [2024-01-31 17:32:49,192 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 463 predicate places. [2024-01-31 17:32:49,192 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 699 transitions, 17020 flow [2024-01-31 17:32:49,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.069767441860465) internal successors, (347), 43 states have internal predecessors, (347), 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 17:32:49,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:32:49,192 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:32:49,203 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 17:32:49,393 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 17:32:49,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:32:49,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:32:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash 207738543, now seen corresponding path program 2 times [2024-01-31 17:32:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:32:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321913500] [2024-01-31 17:32:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:32:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:32:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:32:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:32:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321913500] [2024-01-31 17:32:49,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321913500] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:32:49,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505311716] [2024-01-31 17:32:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:32:49,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:32:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:32:49,812 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 17:32:49,816 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 17:32:49,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:32:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:32:49,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 17:32:49,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:32:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:49,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:32:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:32:50,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505311716] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:32:50,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:32:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 51 [2024-01-31 17:32:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052173844] [2024-01-31 17:32:50,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:32:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-31 17:32:50,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:32:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-31 17:32:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=2110, Unknown=0, NotChecked=0, Total=2652 [2024-01-31 17:32:50,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-01-31 17:32:50,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 699 transitions, 17020 flow. Second operand has 52 states, 52 states have (on average 6.961538461538462) internal successors, (362), 52 states have internal predecessors, (362), 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 17:32:50,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:32:50,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-01-31 17:32:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand