./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-three-array-sum-alt.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-three-array-sum-alt.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:02:39,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:02:39,096 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:02:39,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:02:39,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:02:39,127 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:02:39,128 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:02:39,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:02:39,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:02:39,132 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:02:39,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:02:39,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:02:39,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:02:39,135 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:02:39,135 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:02:39,135 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:02:39,135 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:02:39,135 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:02:39,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:02:39,136 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:02:39,136 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:02:39,137 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:02:39,137 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:02:39,137 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:02:39,137 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:02:39,138 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:02:39,138 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:02:39,138 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:02:39,139 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:02:39,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:02:39,140 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:02:39,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:02:39,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:39,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:02:39,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:02:39,141 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:02:39,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:02:39,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:02:39,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:02:39,142 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:02:39,142 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:02:39,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:02:39,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:02:39,143 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:02:39,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:02:39,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:02:39,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:02:39,361 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:02:39,362 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:02:39,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-bad-three-array-sum-alt.wvr.yml/witness.yml [2024-01-31 17:02:39,491 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:02:39,492 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:02:39,494 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-01-31 17:02:40,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:02:40,904 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:02:40,905 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-01-31 17:02:40,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78f0d119/c813d3eb6b5041a79ff56c38f26a2d5a/FLAGa8d4a2f08 [2024-01-31 17:02:40,921 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e78f0d119/c813d3eb6b5041a79ff56c38f26a2d5a [2024-01-31 17:02:40,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:02:40,928 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:02:40,931 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:40,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:02:40,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:02:40,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:39" (1/2) ... [2024-01-31 17:02:40,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83c19e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:40, skipping insertion in model container [2024-01-31 17:02:40,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:39" (1/2) ... [2024-01-31 17:02:40,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d4f0d18 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:02:40, skipping insertion in model container [2024-01-31 17:02:40,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:40" (2/2) ... [2024-01-31 17:02:40,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@83c19e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:40, skipping insertion in model container [2024-01-31 17:02:40,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:02:40" (2/2) ... [2024-01-31 17:02:40,955 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:02:41,038 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:02:41,056 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:02:41,237 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-01-31 17:02:41,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:41,266 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:02:41,300 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c[2451,2464] [2024-01-31 17:02:41,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:02:41,320 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:02:41,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41 WrapperNode [2024-01-31 17:02:41,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:02:41,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:41,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:02:41,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:02:41,330 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,371 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 283 [2024-01-31 17:02:41,371 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:02:41,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:02:41,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:02:41,372 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:02:41,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,384 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,401 INFO L175 MemorySlicer]: Split 17 memory accesses to 5 slices as follows [2, 2, 9, 2, 2]. 53 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 4, 1, 1]. [2024-01-31 17:02:41,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:02:41,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:02:41,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:02:41,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:02:41,448 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (1/1) ... [2024-01-31 17:02:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:02:41,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:41,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:02:41,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:02:41,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:02:41,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:02:41,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:02:41,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:02:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:02:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:02:41,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:02:41,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:02:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:02:41,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:02:41,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:02:41,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:02:41,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:02:41,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:02:41,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:02:41,563 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:02:41,685 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:02:41,686 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:02:41,982 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:02:41,983 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:02:42,232 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:02:42,232 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-31 17:02:42,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:42 BoogieIcfgContainer [2024-01-31 17:02:42,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:02:42,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:02:42,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:02:42,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:02:42,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:02:39" (1/4) ... [2024-01-31 17:02:42,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473b257d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:02:42, skipping insertion in model container [2024-01-31 17:02:42,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:02:40" (2/4) ... [2024-01-31 17:02:42,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473b257d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:42, skipping insertion in model container [2024-01-31 17:02:42,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:02:41" (3/4) ... [2024-01-31 17:02:42,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473b257d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:02:42, skipping insertion in model container [2024-01-31 17:02:42,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:02:42" (4/4) ... [2024-01-31 17:02:42,241 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-01-31 17:02:42,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:02:42,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:02:42,256 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:02:42,298 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:02:42,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2024-01-31 17:02:42,366 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2024-01-31 17:02:42,366 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:02:42,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-01-31 17:02:42,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2024-01-31 17:02:42,373 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2024-01-31 17:02:42,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:02:42,394 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;@7d288c38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:02:42,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:02:42,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:02:42,407 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2024-01-31 17:02:42,407 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:02:42,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:42,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:42,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:42,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -783779341, now seen corresponding path program 1 times [2024-01-31 17:02:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:42,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259082434] [2024-01-31 17:02:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259082434] [2024-01-31 17:02:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259082434] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:02:42,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549761980] [2024-01-31 17:02:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:42,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:02:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:42,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:02:42,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:02:42,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:42,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:42,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:42,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:42,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:43,072 INFO L124 PetriNetUnfolderBase]: 431/637 cut-off events. [2024-01-31 17:02:43,072 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-01-31 17:02:43,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1350 conditions, 637 events. 431/637 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1990 event pairs, 138 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2024-01-31 17:02:43,082 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 42 selfloop transitions, 4 changer transitions 1/48 dead transitions. [2024-01-31 17:02:43,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 223 flow [2024-01-31 17:02:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:02:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:02:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-01-31 17:02:43,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-01-31 17:02:43,099 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-01-31 17:02:43,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 223 flow [2024-01-31 17:02:43,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 48 transitions, 201 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:02:43,106 INFO L231 Difference]: Finished difference. Result has 30 places, 32 transitions, 90 flow [2024-01-31 17:02:43,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=32} [2024-01-31 17:02:43,111 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-31 17:02:43,111 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 32 transitions, 90 flow [2024-01-31 17:02:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:43,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:43,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:02:43,112 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:43,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash 695678084, now seen corresponding path program 1 times [2024-01-31 17:02:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760107731] [2024-01-31 17:02:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760107731] [2024-01-31 17:02:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760107731] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:43,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050302528] [2024-01-31 17:02:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:43,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:43,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:43,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:02:43,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:43,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:43,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:43,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:43,476 INFO L124 PetriNetUnfolderBase]: 793/1195 cut-off events. [2024-01-31 17:02:43,477 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2024-01-31 17:02:43,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2851 conditions, 1195 events. 793/1195 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4346 event pairs, 457 based on Foata normal form. 46/1231 useless extension candidates. Maximal degree in co-relation 1030. Up to 637 conditions per place. [2024-01-31 17:02:43,483 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 65 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-01-31 17:02:43,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 81 transitions, 378 flow [2024-01-31 17:02:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:02:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:02:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-01-31 17:02:43,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-01-31 17:02:43,485 INFO L175 Difference]: Start difference. First operand has 30 places, 32 transitions, 90 flow. Second operand 6 states and 98 transitions. [2024-01-31 17:02:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 81 transitions, 378 flow [2024-01-31 17:02:43,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 81 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:02:43,487 INFO L231 Difference]: Finished difference. Result has 38 places, 45 transitions, 190 flow [2024-01-31 17:02:43,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=38, PETRI_TRANSITIONS=45} [2024-01-31 17:02:43,488 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2024-01-31 17:02:43,488 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 45 transitions, 190 flow [2024-01-31 17:02:43,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:43,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:02:43,489 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:43,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1897048753, now seen corresponding path program 1 times [2024-01-31 17:02:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965664752] [2024-01-31 17:02:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:43,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965664752] [2024-01-31 17:02:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965664752] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:43,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219888871] [2024-01-31 17:02:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:43,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:43,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:02:43,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:43,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 45 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:43,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:43,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:43,801 INFO L124 PetriNetUnfolderBase]: 691/1063 cut-off events. [2024-01-31 17:02:43,801 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-01-31 17:02:43,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 1063 events. 691/1063 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3818 event pairs, 417 based on Foata normal form. 46/1106 useless extension candidates. Maximal degree in co-relation 1605. Up to 637 conditions per place. [2024-01-31 17:02:43,807 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 61 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-01-31 17:02:43,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 444 flow [2024-01-31 17:02:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:02:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:02:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-01-31 17:02:43,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-01-31 17:02:43,810 INFO L175 Difference]: Start difference. First operand has 38 places, 45 transitions, 190 flow. Second operand 6 states and 96 transitions. [2024-01-31 17:02:43,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 444 flow [2024-01-31 17:02:43,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:02:43,815 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 241 flow [2024-01-31 17:02:43,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2024-01-31 17:02:43,816 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2024-01-31 17:02:43,816 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 241 flow [2024-01-31 17:02:43,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:43,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:02:43,817 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:43,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:43,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2030837961, now seen corresponding path program 1 times [2024-01-31 17:02:43,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:43,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682560528] [2024-01-31 17:02:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:02:43,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682560528] [2024-01-31 17:02:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682560528] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:02:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:02:43,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:02:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640330420] [2024-01-31 17:02:43,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:02:43,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:43,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:43,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:43,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:43,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:44,095 INFO L124 PetriNetUnfolderBase]: 575/892 cut-off events. [2024-01-31 17:02:44,096 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2024-01-31 17:02:44,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2597 conditions, 892 events. 575/892 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3018 event pairs, 369 based on Foata normal form. 26/915 useless extension candidates. Maximal degree in co-relation 1781. Up to 637 conditions per place. [2024-01-31 17:02:44,100 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 28 selfloop transitions, 6 changer transitions 37/72 dead transitions. [2024-01-31 17:02:44,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 469 flow [2024-01-31 17:02:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:02:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:02:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-01-31 17:02:44,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-01-31 17:02:44,101 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 241 flow. Second operand 6 states and 93 transitions. [2024-01-31 17:02:44,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 469 flow [2024-01-31 17:02:44,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 448 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:44,104 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 158 flow [2024-01-31 17:02:44,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-01-31 17:02:44,105 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2024-01-31 17:02:44,105 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 158 flow [2024-01-31 17:02:44,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:44,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:44,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:44,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:02:44,106 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:44,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:44,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1638250998, now seen corresponding path program 1 times [2024-01-31 17:02:44,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:44,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78105786] [2024-01-31 17:02:44,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:44,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:44,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:44,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78105786] [2024-01-31 17:02:44,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78105786] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:44,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457550649] [2024-01-31 17:02:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:44,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:44,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:44,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:02:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:44,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:44,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:44,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:44,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457550649] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:44,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:44,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-31 17:02:44,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774323610] [2024-01-31 17:02:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:44,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:02:44,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:44,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:44,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:44,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:44,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:44,528 INFO L124 PetriNetUnfolderBase]: 416/614 cut-off events. [2024-01-31 17:02:44,528 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2024-01-31 17:02:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 614 events. 416/614 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1866 event pairs, 166 based on Foata normal form. 56/669 useless extension candidates. Maximal degree in co-relation 1856. Up to 427 conditions per place. [2024-01-31 17:02:44,531 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 43 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-01-31 17:02:44,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 310 flow [2024-01-31 17:02:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-31 17:02:44,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-01-31 17:02:44,533 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 158 flow. Second operand 5 states and 62 transitions. [2024-01-31 17:02:44,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 310 flow [2024-01-31 17:02:44,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 246 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-01-31 17:02:44,536 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 131 flow [2024-01-31 17:02:44,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=131, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-01-31 17:02:44,537 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2024-01-31 17:02:44,537 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 131 flow [2024-01-31 17:02:44,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:44,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:44,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:44,552 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 17:02:44,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:44,750 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:44,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2003372971, now seen corresponding path program 1 times [2024-01-31 17:02:44,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:44,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373338180] [2024-01-31 17:02:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:44,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373338180] [2024-01-31 17:02:44,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373338180] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22543125] [2024-01-31 17:02:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:44,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:44,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:44,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:02:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:45,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:45,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:45,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22543125] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:45,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-31 17:02:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845182731] [2024-01-31 17:02:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:45,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:02:45,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:45,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:45,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:45,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:45,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:45,162 INFO L124 PetriNetUnfolderBase]: 410/602 cut-off events. [2024-01-31 17:02:45,162 INFO L125 PetriNetUnfolderBase]: For 424/424 co-relation queries the response was YES. [2024-01-31 17:02:45,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 602 events. 410/602 cut-off events. For 424/424 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1809 event pairs, 183 based on Foata normal form. 42/641 useless extension candidates. Maximal degree in co-relation 1628. Up to 460 conditions per place. [2024-01-31 17:02:45,165 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 45 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-01-31 17:02:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 288 flow [2024-01-31 17:02:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-31 17:02:45,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-01-31 17:02:45,166 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 131 flow. Second operand 5 states and 62 transitions. [2024-01-31 17:02:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 288 flow [2024-01-31 17:02:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 270 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-31 17:02:45,168 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 141 flow [2024-01-31 17:02:45,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-01-31 17:02:45,168 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2024-01-31 17:02:45,169 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 141 flow [2024-01-31 17:02:45,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:45,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:45,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:45,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:45,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 17:02:45,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:45,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 927440782, now seen corresponding path program 1 times [2024-01-31 17:02:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543327767] [2024-01-31 17:02:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:45,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:45,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543327767] [2024-01-31 17:02:45,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543327767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:45,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783694177] [2024-01-31 17:02:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:45,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:45,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:45,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:02:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:45,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-31 17:02:45,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:45,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:02:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783694177] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:45,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:02:45,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-31 17:02:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563299402] [2024-01-31 17:02:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:02:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:02:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:45,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:02:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-31 17:02:45,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:45,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 17:02:45,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:45,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:45,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:02:45,820 INFO L124 PetriNetUnfolderBase]: 468/686 cut-off events. [2024-01-31 17:02:45,820 INFO L125 PetriNetUnfolderBase]: For 622/622 co-relation queries the response was YES. [2024-01-31 17:02:45,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 686 events. 468/686 cut-off events. For 622/622 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2061 event pairs, 221 based on Foata normal form. 42/725 useless extension candidates. Maximal degree in co-relation 1990. Up to 544 conditions per place. [2024-01-31 17:02:45,840 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 47 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-01-31 17:02:45,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 312 flow [2024-01-31 17:02:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:02:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:02:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-01-31 17:02:45,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2024-01-31 17:02:45,841 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 141 flow. Second operand 5 states and 62 transitions. [2024-01-31 17:02:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 312 flow [2024-01-31 17:02:45,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 294 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-31 17:02:45,842 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 151 flow [2024-01-31 17:02:45,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-01-31 17:02:45,843 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-01-31 17:02:45,843 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 151 flow [2024-01-31 17:02:45,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 17:02:45,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:02:45,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:02:45,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:02:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:46,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:02:46,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:02:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2032112774, now seen corresponding path program 1 times [2024-01-31 17:02:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:02:46,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324841000] [2024-01-31 17:02:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:46,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:02:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:02:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:02:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324841000] [2024-01-31 17:02:46,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324841000] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:02:46,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076971343] [2024-01-31 17:02:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:02:46,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:02:46,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:02:46,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:02:46,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:02:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:02:47,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:02:47,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:02:47,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:02:47,106 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:02:47,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:02:47,296 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-01-31 17:02:47,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:02:47,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-01-31 17:02:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:02:47,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:02:51,461 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse1 (select (select |c_#memory_int#2| c_~A~0.base) (+ .cse0 c_~A~0.offset))) (.cse2 (select (select |c_#memory_int#2| c_~B~0.base) (+ .cse0 ~B~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) (+ .cse0 ~C~0.offset) (+ .cse1 .cse2))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse1 c_~csum~0 .cse2))))) is different from false [2024-01-31 17:02:55,533 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#2| c_~B~0.base) ~B~0.offset)) (.cse1 (select (select |c_#memory_int#2| c_~A~0.base) c_~A~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse0 .cse1 c_~csum~0)))) is different from false [2024-01-31 17:02:56,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:02:56,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2024-01-31 17:02:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-01-31 17:02:57,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076971343] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:02:57,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:02:57,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-01-31 17:02:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718586693] [2024-01-31 17:02:57,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:02:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:02:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:02:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:02:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=640, Unknown=2, NotChecked=106, Total=870 [2024-01-31 17:02:57,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:02:57,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 151 flow. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:02:57,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:02:57,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:02:57,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:07,283 INFO L124 PetriNetUnfolderBase]: 682/999 cut-off events. [2024-01-31 17:03:07,283 INFO L125 PetriNetUnfolderBase]: For 766/766 co-relation queries the response was YES. [2024-01-31 17:03:07,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 999 events. 682/999 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3434 event pairs, 31 based on Foata normal form. 1/997 useless extension candidates. Maximal degree in co-relation 3104. Up to 729 conditions per place. [2024-01-31 17:03:07,289 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 73 selfloop transitions, 30 changer transitions 1/105 dead transitions. [2024-01-31 17:03:07,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 105 transitions, 605 flow [2024-01-31 17:03:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:03:07,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:03:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-01-31 17:03:07,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-01-31 17:03:07,292 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 151 flow. Second operand 13 states and 154 transitions. [2024-01-31 17:03:07,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 105 transitions, 605 flow [2024-01-31 17:03:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 105 transitions, 578 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-31 17:03:07,294 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 332 flow [2024-01-31 17:03:07,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=332, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2024-01-31 17:03:07,295 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 21 predicate places. [2024-01-31 17:03:07,295 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 332 flow [2024-01-31 17:03:07,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:07,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:07,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:07,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:07,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:07,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:07,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash 178995322, now seen corresponding path program 2 times [2024-01-31 17:03:07,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:07,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785296381] [2024-01-31 17:03:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:07,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785296381] [2024-01-31 17:03:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785296381] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465046995] [2024-01-31 17:03:10,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:03:10,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:10,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:10,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:03:10,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:03:10,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:10,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:03:10,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:13,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:13,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:03:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:14,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:15,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:15,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-01-31 17:03:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465046995] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:16,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:16,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2024-01-31 17:03:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822448284] [2024-01-31 17:03:16,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:16,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:03:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:03:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:03:16,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:03:16,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 332 flow. Second operand has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:16,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:16,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:03:16,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:22,657 INFO L124 PetriNetUnfolderBase]: 801/1173 cut-off events. [2024-01-31 17:03:22,657 INFO L125 PetriNetUnfolderBase]: For 1637/1637 co-relation queries the response was YES. [2024-01-31 17:03:22,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4355 conditions, 1173 events. 801/1173 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4096 event pairs, 147 based on Foata normal form. 1/1174 useless extension candidates. Maximal degree in co-relation 4305. Up to 1000 conditions per place. [2024-01-31 17:03:22,663 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 76 selfloop transitions, 35 changer transitions 1/113 dead transitions. [2024-01-31 17:03:22,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 113 transitions, 810 flow [2024-01-31 17:03:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:03:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:03:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-01-31 17:03:22,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32634032634032634 [2024-01-31 17:03:22,668 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 332 flow. Second operand 13 states and 140 transitions. [2024-01-31 17:03:22,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 113 transitions, 810 flow [2024-01-31 17:03:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 113 transitions, 749 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-01-31 17:03:22,680 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 554 flow [2024-01-31 17:03:22,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2024-01-31 17:03:22,683 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 37 predicate places. [2024-01-31 17:03:22,683 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 554 flow [2024-01-31 17:03:22,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:22,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:22,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:22,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:22,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:22,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:22,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1273047658, now seen corresponding path program 3 times [2024-01-31 17:03:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:22,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415888909] [2024-01-31 17:03:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:03:25,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415888909] [2024-01-31 17:03:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415888909] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247462011] [2024-01-31 17:03:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:03:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:25,986 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:25,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:03:26,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:03:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:26,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:03:26,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:29,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:29,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:03:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:29,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:03:30,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:30,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2024-01-31 17:03:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:32,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247462011] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:03:32,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:03:32,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 22 [2024-01-31 17:03:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003336163] [2024-01-31 17:03:32,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:03:32,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:03:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:03:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:03:32,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:03:32,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:03:32,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 554 flow. Second operand has 23 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 23 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:32,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:03:32,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:03:32,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:03:39,738 INFO L124 PetriNetUnfolderBase]: 943/1380 cut-off events. [2024-01-31 17:03:39,738 INFO L125 PetriNetUnfolderBase]: For 2937/2937 co-relation queries the response was YES. [2024-01-31 17:03:39,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5641 conditions, 1380 events. 943/1380 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5005 event pairs, 184 based on Foata normal form. 1/1381 useless extension candidates. Maximal degree in co-relation 5582. Up to 1181 conditions per place. [2024-01-31 17:03:39,748 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 92 selfloop transitions, 45 changer transitions 1/139 dead transitions. [2024-01-31 17:03:39,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 1119 flow [2024-01-31 17:03:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:03:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:03:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-01-31 17:03:39,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34032634032634035 [2024-01-31 17:03:39,750 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 554 flow. Second operand 13 states and 146 transitions. [2024-01-31 17:03:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 1119 flow [2024-01-31 17:03:39,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 139 transitions, 1073 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-01-31 17:03:39,757 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 827 flow [2024-01-31 17:03:39,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=827, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2024-01-31 17:03:39,758 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2024-01-31 17:03:39,759 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 827 flow [2024-01-31 17:03:39,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.6521739130434785) internal successors, (153), 23 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:03:39,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:03:39,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:03:39,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:03:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:39,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:03:39,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:03:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash 220072492, now seen corresponding path program 4 times [2024-01-31 17:03:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:03:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275968579] [2024-01-31 17:03:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:03:39,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:03:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:03:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:03:43,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:03:43,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275968579] [2024-01-31 17:03:43,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275968579] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:03:43,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837526912] [2024-01-31 17:03:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:03:43,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:03:43,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:03:43,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:03:43,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:03:43,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:03:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:03:43,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:03:43,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:03:45,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:03:45,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-01-31 17:03:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:03:46,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:04:47,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:04:47,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 87 [2024-01-31 17:04:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:04:49,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837526912] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:04:49,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:04:49,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 24 [2024-01-31 17:04:49,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357115941] [2024-01-31 17:04:49,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:04:49,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:04:49,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:04:49,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:04:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=494, Unknown=14, NotChecked=0, Total=600 [2024-01-31 17:04:49,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:04:49,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 827 flow. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:04:49,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:04:49,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:04:49,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:06,960 INFO L124 PetriNetUnfolderBase]: 1075/1573 cut-off events. [2024-01-31 17:05:06,960 INFO L125 PetriNetUnfolderBase]: For 5004/5004 co-relation queries the response was YES. [2024-01-31 17:05:06,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7003 conditions, 1573 events. 1075/1573 cut-off events. For 5004/5004 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5806 event pairs, 271 based on Foata normal form. 1/1574 useless extension candidates. Maximal degree in co-relation 6937. Up to 1368 conditions per place. [2024-01-31 17:05:06,972 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 97 selfloop transitions, 54 changer transitions 1/153 dead transitions. [2024-01-31 17:05:06,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1432 flow [2024-01-31 17:05:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:05:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:05:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2024-01-31 17:05:06,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2024-01-31 17:05:06,974 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 827 flow. Second operand 15 states and 150 transitions. [2024-01-31 17:05:06,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1432 flow [2024-01-31 17:05:06,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 153 transitions, 1344 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-01-31 17:05:06,989 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 1125 flow [2024-01-31 17:05:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1125, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-01-31 17:05:06,989 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2024-01-31 17:05:06,990 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 1125 flow [2024-01-31 17:05:06,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 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 17:05:06,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:06,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:07,016 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 17:05:07,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:07,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:05:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1823788844, now seen corresponding path program 5 times [2024-01-31 17:05:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956336992] [2024-01-31 17:05:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:05:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956336992] [2024-01-31 17:05:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956336992] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995157137] [2024-01-31 17:05:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:05:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:10,604 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 17:05:10,606 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 17:05:10,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:05:10,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:10,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-31 17:05:10,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:14,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:05:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:05:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:14,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:15,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:05:15,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-01-31 17:05:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995157137] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:16,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:16,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 22 [2024-01-31 17:05:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685177994] [2024-01-31 17:05:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:05:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:05:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:05:16,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:05:16,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 1125 flow. Second operand has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 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 17:05:16,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:16,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:05:16,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:26,201 INFO L124 PetriNetUnfolderBase]: 1241/1818 cut-off events. [2024-01-31 17:05:26,201 INFO L125 PetriNetUnfolderBase]: For 7728/7728 co-relation queries the response was YES. [2024-01-31 17:05:26,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 1818 events. 1241/1818 cut-off events. For 7728/7728 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7170 event pairs, 100 based on Foata normal form. 1/1819 useless extension candidates. Maximal degree in co-relation 8600. Up to 1335 conditions per place. [2024-01-31 17:05:26,213 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 101 selfloop transitions, 78 changer transitions 1/181 dead transitions. [2024-01-31 17:05:26,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 181 transitions, 1772 flow [2024-01-31 17:05:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:05:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:05:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-01-31 17:05:26,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776223776223776 [2024-01-31 17:05:26,215 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 1125 flow. Second operand 13 states and 162 transitions. [2024-01-31 17:05:26,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 181 transitions, 1772 flow [2024-01-31 17:05:26,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 181 transitions, 1684 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-01-31 17:05:26,233 INFO L231 Difference]: Finished difference. Result has 106 places, 130 transitions, 1357 flow [2024-01-31 17:05:26,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1357, PETRI_PLACES=106, PETRI_TRANSITIONS=130} [2024-01-31 17:05:26,234 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 73 predicate places. [2024-01-31 17:05:26,234 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 130 transitions, 1357 flow [2024-01-31 17:05:26,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.608695652173913) internal successors, (152), 23 states have internal predecessors, (152), 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 17:05:26,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:26,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:26,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-31 17:05:26,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:05:26,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:05:26,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:26,446 INFO L85 PathProgramCache]: Analyzing trace with hash 836351564, now seen corresponding path program 6 times [2024-01-31 17:05:26,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:26,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822339266] [2024-01-31 17:05:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:26,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822339266] [2024-01-31 17:05:30,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822339266] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:30,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917565352] [2024-01-31 17:05:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:05:30,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:30,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:30,673 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 17:05:30,674 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 17:05:30,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:05:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:05:30,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:05:30,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:33,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:05:33,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:05:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:33,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:05:35,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:05:35,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-01-31 17:05:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917565352] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:05:35,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:05:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 21 [2024-01-31 17:05:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16303367] [2024-01-31 17:05:35,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:05:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:05:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:05:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:05:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:05:35,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:05:35,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 130 transitions, 1357 flow. Second operand has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:35,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:05:35,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:05:35,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:05:45,603 INFO L124 PetriNetUnfolderBase]: 1331/1951 cut-off events. [2024-01-31 17:05:45,603 INFO L125 PetriNetUnfolderBase]: For 9634/9634 co-relation queries the response was YES. [2024-01-31 17:05:45,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9860 conditions, 1951 events. 1331/1951 cut-off events. For 9634/9634 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7788 event pairs, 168 based on Foata normal form. 1/1952 useless extension candidates. Maximal degree in co-relation 9785. Up to 1606 conditions per place. [2024-01-31 17:05:45,621 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 111 selfloop transitions, 72 changer transitions 1/185 dead transitions. [2024-01-31 17:05:45,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 185 transitions, 2021 flow [2024-01-31 17:05:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:05:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:05:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 162 transitions. [2024-01-31 17:05:45,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-01-31 17:05:45,663 INFO L175 Difference]: Start difference. First operand has 106 places, 130 transitions, 1357 flow. Second operand 15 states and 162 transitions. [2024-01-31 17:05:45,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 185 transitions, 2021 flow [2024-01-31 17:05:45,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 185 transitions, 1825 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-01-31 17:05:45,686 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1543 flow [2024-01-31 17:05:45,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1543, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-01-31 17:05:45,687 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 83 predicate places. [2024-01-31 17:05:45,687 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1543 flow [2024-01-31 17:05:45,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.636363636363637) internal successors, (146), 22 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:05:45,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:05:45,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:05:45,708 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 17:05:45,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-31 17:05:45,910 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:05:45,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:05:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1438899892, now seen corresponding path program 7 times [2024-01-31 17:05:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:05:45,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30440396] [2024-01-31 17:05:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:05:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:05:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:05:49,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:05:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30440396] [2024-01-31 17:05:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30440396] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:05:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95744659] [2024-01-31 17:05:49,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:05:49,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:05:49,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:05:49,674 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 17:05:49,675 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 17:05:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:05:49,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:05:49,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:05:52,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:05:52,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-01-31 17:05:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:05:53,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:02,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:02,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-01-31 17:07:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95744659] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:03,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 24 [2024-01-31 17:07:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657376546] [2024-01-31 17:07:03,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:03,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:07:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:03,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:07:03,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=496, Unknown=14, NotChecked=0, Total=600 [2024-01-31 17:07:03,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:07:03,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1543 flow. Second operand has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 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 17:07:03,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:03,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:07:03,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:18,036 INFO L124 PetriNetUnfolderBase]: 1391/2040 cut-off events. [2024-01-31 17:07:18,036 INFO L125 PetriNetUnfolderBase]: For 10385/10385 co-relation queries the response was YES. [2024-01-31 17:07:18,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 2040 events. 1391/2040 cut-off events. For 10385/10385 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8245 event pairs, 184 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 10376. Up to 1695 conditions per place. [2024-01-31 17:07:18,047 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 116 selfloop transitions, 74 changer transitions 1/192 dead transitions. [2024-01-31 17:07:18,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 192 transitions, 2132 flow [2024-01-31 17:07:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:07:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:07:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 164 transitions. [2024-01-31 17:07:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33131313131313134 [2024-01-31 17:07:18,051 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1543 flow. Second operand 15 states and 164 transitions. [2024-01-31 17:07:18,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 192 transitions, 2132 flow [2024-01-31 17:07:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 192 transitions, 1954 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-01-31 17:07:18,071 INFO L231 Difference]: Finished difference. Result has 123 places, 147 transitions, 1613 flow [2024-01-31 17:07:18,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1613, PETRI_PLACES=123, PETRI_TRANSITIONS=147} [2024-01-31 17:07:18,071 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 90 predicate places. [2024-01-31 17:07:18,072 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 147 transitions, 1613 flow [2024-01-31 17:07:18,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.96) internal successors, (174), 25 states have internal predecessors, (174), 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 17:07:18,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:18,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:18,100 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 17:07:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:07:18,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:07:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1015035542, now seen corresponding path program 8 times [2024-01-31 17:07:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:18,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101135922] [2024-01-31 17:07:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:07:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101135922] [2024-01-31 17:07:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101135922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921539059] [2024-01-31 17:07:21,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:07:21,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:21,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:21,681 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 17:07:21,682 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 17:07:21,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:07:21,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:21,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-31 17:07:21,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:22,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:07:22,335 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:07:22,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:07:24,943 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-01-31 17:07:24,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:07:26,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:26,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2024-01-31 17:07:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:27,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:07:29,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:29,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2024-01-31 17:07:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921539059] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:07:31,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:07:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2024-01-31 17:07:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333006517] [2024-01-31 17:07:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:07:31,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:07:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:07:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:07:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:07:31,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:07:31,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 147 transitions, 1613 flow. Second operand has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 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 17:07:31,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:07:31,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:07:31,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:07:43,601 INFO L124 PetriNetUnfolderBase]: 1535/2249 cut-off events. [2024-01-31 17:07:43,601 INFO L125 PetriNetUnfolderBase]: For 13058/13058 co-relation queries the response was YES. [2024-01-31 17:07:43,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11501 conditions, 2249 events. 1535/2249 cut-off events. For 13058/13058 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9301 event pairs, 184 based on Foata normal form. 1/2250 useless extension candidates. Maximal degree in co-relation 11419. Up to 1824 conditions per place. [2024-01-31 17:07:43,618 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 119 selfloop transitions, 78 changer transitions 1/199 dead transitions. [2024-01-31 17:07:43,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 199 transitions, 2290 flow [2024-01-31 17:07:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:07:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:07:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-01-31 17:07:43,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-01-31 17:07:43,621 INFO L175 Difference]: Start difference. First operand has 123 places, 147 transitions, 1613 flow. Second operand 13 states and 154 transitions. [2024-01-31 17:07:43,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 199 transitions, 2290 flow [2024-01-31 17:07:43,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 199 transitions, 2082 flow, removed 30 selfloop flow, removed 14 redundant places. [2024-01-31 17:07:43,659 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1747 flow [2024-01-31 17:07:43,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1747, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-01-31 17:07:43,661 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 90 predicate places. [2024-01-31 17:07:43,661 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1747 flow [2024-01-31 17:07:43,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 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 17:07:43,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:07:43,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:07:43,677 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 17:07:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:07:43,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:07:43,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:07:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash -141647496, now seen corresponding path program 9 times [2024-01-31 17:07:43,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:07:43,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14685906] [2024-01-31 17:07:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:07:43,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:07:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:07:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:07:47,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:07:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14685906] [2024-01-31 17:07:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14685906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:07:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196973765] [2024-01-31 17:07:47,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:07:47,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:07:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:07:47,258 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 17:07:47,259 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 17:07:47,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:07:47,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:07:47,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-31 17:07:47,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:07:47,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:07:47,916 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:07:47,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:07:50,836 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-01-31 17:07:50,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:07:52,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:07:52,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2024-01-31 17:07:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:07:52,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:02,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:02,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 40 [2024-01-31 17:08:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196973765] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:03,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:03,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2024-01-31 17:08:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817971169] [2024-01-31 17:08:03,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:08:03,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:03,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:08:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:08:03,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:08:03,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1747 flow. Second operand has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 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 17:08:03,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:03,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:08:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:13,108 INFO L124 PetriNetUnfolderBase]: 1623/2378 cut-off events. [2024-01-31 17:08:13,108 INFO L125 PetriNetUnfolderBase]: For 14556/14556 co-relation queries the response was YES. [2024-01-31 17:08:13,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12316 conditions, 2378 events. 1623/2378 cut-off events. For 14556/14556 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10001 event pairs, 218 based on Foata normal form. 1/2379 useless extension candidates. Maximal degree in co-relation 12234. Up to 2037 conditions per place. [2024-01-31 17:08:13,121 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 130 selfloop transitions, 72 changer transitions 1/204 dead transitions. [2024-01-31 17:08:13,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 204 transitions, 2391 flow [2024-01-31 17:08:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:08:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:08:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-01-31 17:08:13,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543123543123543 [2024-01-31 17:08:13,122 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1747 flow. Second operand 13 states and 152 transitions. [2024-01-31 17:08:13,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 204 transitions, 2391 flow [2024-01-31 17:08:13,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 204 transitions, 2159 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-01-31 17:08:13,154 INFO L231 Difference]: Finished difference. Result has 129 places, 163 transitions, 1802 flow [2024-01-31 17:08:13,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1802, PETRI_PLACES=129, PETRI_TRANSITIONS=163} [2024-01-31 17:08:13,154 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2024-01-31 17:08:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 163 transitions, 1802 flow [2024-01-31 17:08:13,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.4) internal successors, (160), 25 states have internal predecessors, (160), 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 17:08:13,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:13,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:13,166 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 17:08:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:08:13,366 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:13,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1442847502, now seen corresponding path program 10 times [2024-01-31 17:08:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036873504] [2024-01-31 17:08:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:08:16,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036873504] [2024-01-31 17:08:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036873504] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512821963] [2024-01-31 17:08:16,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:08:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:16,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:16,422 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 17:08:16,424 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 17:08:16,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:08:16,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:16,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:08:16,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:19,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:19,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-01-31 17:08:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:19,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:37,256 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:37,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2024-01-31 17:08:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512821963] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:39,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:39,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-01-31 17:08:39,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416760981] [2024-01-31 17:08:39,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:39,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:08:39,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:39,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:08:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=457, Unknown=2, NotChecked=0, Total=552 [2024-01-31 17:08:39,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:08:39,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 163 transitions, 1802 flow. Second operand has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 24 states have internal predecessors, (170), 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 17:08:39,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:39,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:08:39,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:08:48,971 INFO L124 PetriNetUnfolderBase]: 1872/2742 cut-off events. [2024-01-31 17:08:48,972 INFO L125 PetriNetUnfolderBase]: For 19259/19259 co-relation queries the response was YES. [2024-01-31 17:08:48,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14683 conditions, 2742 events. 1872/2742 cut-off events. For 19259/19259 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11813 event pairs, 532 based on Foata normal form. 1/2743 useless extension candidates. Maximal degree in co-relation 14598. Up to 2396 conditions per place. [2024-01-31 17:08:48,989 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 165 selfloop transitions, 71 changer transitions 1/238 dead transitions. [2024-01-31 17:08:48,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 238 transitions, 2945 flow [2024-01-31 17:08:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:08:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:08:48,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-01-31 17:08:48,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-01-31 17:08:48,991 INFO L175 Difference]: Start difference. First operand has 129 places, 163 transitions, 1802 flow. Second operand 13 states and 154 transitions. [2024-01-31 17:08:48,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 238 transitions, 2945 flow [2024-01-31 17:08:49,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 2705 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-01-31 17:08:49,019 INFO L231 Difference]: Finished difference. Result has 135 places, 194 transitions, 2326 flow [2024-01-31 17:08:49,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1606, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2326, PETRI_PLACES=135, PETRI_TRANSITIONS=194} [2024-01-31 17:08:49,020 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 102 predicate places. [2024-01-31 17:08:49,020 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 194 transitions, 2326 flow [2024-01-31 17:08:49,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 24 states have internal predecessors, (170), 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 17:08:49,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:08:49,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:08:49,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:08:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:08:49,232 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:08:49,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:08:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2135341078, now seen corresponding path program 11 times [2024-01-31 17:08:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:08:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138298664] [2024-01-31 17:08:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:08:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:08:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:08:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:08:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:08:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138298664] [2024-01-31 17:08:52,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138298664] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:08:52,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949081594] [2024-01-31 17:08:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:08:52,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:08:52,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:08:52,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:08:52,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:08:52,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:08:52,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:08:52,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-31 17:08:52,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:08:52,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:08:52,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:08:53,399 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:08:53,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:08:53,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-01-31 17:08:56,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:08:56,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-01-31 17:08:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:08:56,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:08:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:08:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949081594] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:08:59,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:08:59,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 27 [2024-01-31 17:08:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260038921] [2024-01-31 17:08:59,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:08:59,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:08:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:08:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:08:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:08:59,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:08:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 194 transitions, 2326 flow. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 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 17:08:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:08:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:08:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:09,638 INFO L124 PetriNetUnfolderBase]: 2066/3027 cut-off events. [2024-01-31 17:09:09,639 INFO L125 PetriNetUnfolderBase]: For 25493/25493 co-relation queries the response was YES. [2024-01-31 17:09:09,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16710 conditions, 3027 events. 2066/3027 cut-off events. For 25493/25493 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13296 event pairs, 608 based on Foata normal form. 1/3028 useless extension candidates. Maximal degree in co-relation 16621. Up to 2747 conditions per place. [2024-01-31 17:09:09,671 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 191 selfloop transitions, 59 changer transitions 1/252 dead transitions. [2024-01-31 17:09:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 252 transitions, 3252 flow [2024-01-31 17:09:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:09:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:09:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-01-31 17:09:09,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358974358974359 [2024-01-31 17:09:09,674 INFO L175 Difference]: Start difference. First operand has 135 places, 194 transitions, 2326 flow. Second operand 13 states and 154 transitions. [2024-01-31 17:09:09,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 252 transitions, 3252 flow [2024-01-31 17:09:09,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 252 transitions, 3055 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-01-31 17:09:09,715 INFO L231 Difference]: Finished difference. Result has 146 places, 208 transitions, 2578 flow [2024-01-31 17:09:09,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2578, PETRI_PLACES=146, PETRI_TRANSITIONS=208} [2024-01-31 17:09:09,716 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 113 predicate places. [2024-01-31 17:09:09,716 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 208 transitions, 2578 flow [2024-01-31 17:09:09,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 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 17:09:09,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:09,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:09,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:09:09,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:09,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:09,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1646583540, now seen corresponding path program 12 times [2024-01-31 17:09:09,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:09,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556344202] [2024-01-31 17:09:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:09,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:09:13,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:13,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556344202] [2024-01-31 17:09:13,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556344202] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:13,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982929890] [2024-01-31 17:09:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:09:13,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:13,638 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:09:13,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:09:13,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:09:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:09:13,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:09:13,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:17,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:17,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:09:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:09:17,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:09:19,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:19,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2024-01-31 17:09:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:09:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982929890] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:09:20,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:09:20,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 25 [2024-01-31 17:09:20,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773914725] [2024-01-31 17:09:20,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:09:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:09:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:09:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:09:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:09:20,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:09:20,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 208 transitions, 2578 flow. Second operand has 26 states, 26 states have (on average 6.423076923076923) internal successors, (167), 26 states have internal predecessors, (167), 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 17:09:20,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:09:20,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:09:20,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:09:30,907 INFO L124 PetriNetUnfolderBase]: 2232/3272 cut-off events. [2024-01-31 17:09:30,907 INFO L125 PetriNetUnfolderBase]: For 29390/29390 co-relation queries the response was YES. [2024-01-31 17:09:30,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18160 conditions, 3272 events. 2232/3272 cut-off events. For 29390/29390 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14689 event pairs, 680 based on Foata normal form. 1/3273 useless extension candidates. Maximal degree in co-relation 18066. Up to 2958 conditions per place. [2024-01-31 17:09:30,926 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 202 selfloop transitions, 67 changer transitions 1/271 dead transitions. [2024-01-31 17:09:30,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 271 transitions, 3604 flow [2024-01-31 17:09:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:09:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:09:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 164 transitions. [2024-01-31 17:09:30,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33131313131313134 [2024-01-31 17:09:30,945 INFO L175 Difference]: Start difference. First operand has 146 places, 208 transitions, 2578 flow. Second operand 15 states and 164 transitions. [2024-01-31 17:09:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 271 transitions, 3604 flow [2024-01-31 17:09:30,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 271 transitions, 3364 flow, removed 108 selfloop flow, removed 5 redundant places. [2024-01-31 17:09:31,001 INFO L231 Difference]: Finished difference. Result has 158 places, 225 transitions, 2867 flow [2024-01-31 17:09:31,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2867, PETRI_PLACES=158, PETRI_TRANSITIONS=225} [2024-01-31 17:09:31,002 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 125 predicate places. [2024-01-31 17:09:31,003 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 225 transitions, 2867 flow [2024-01-31 17:09:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.423076923076923) internal successors, (167), 26 states have internal predecessors, (167), 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 17:09:31,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:09:31,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:09:31,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:09:31,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:31,214 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:09:31,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:09:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1539975762, now seen corresponding path program 13 times [2024-01-31 17:09:31,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:09:31,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915445743] [2024-01-31 17:09:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:09:31,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:09:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:09:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:09:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915445743] [2024-01-31 17:09:34,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915445743] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:09:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717478522] [2024-01-31 17:09:34,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:09:34,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:09:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:09:34,516 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:09:34,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:09:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:09:34,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:09:34,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:09:37,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:09:37,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2024-01-31 17:09:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:09:37,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:35,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:10:35,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2024-01-31 17:10:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:37,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717478522] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:37,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:37,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 23 [2024-01-31 17:10:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170317038] [2024-01-31 17:10:37,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:37,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 17:10:37,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:37,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 17:10:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=446, Unknown=13, NotChecked=0, Total=552 [2024-01-31 17:10:37,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:10:37,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 225 transitions, 2867 flow. Second operand has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 24 states have internal predecessors, (170), 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 17:10:37,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:37,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:10:37,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:10:47,275 INFO L124 PetriNetUnfolderBase]: 2332/3419 cut-off events. [2024-01-31 17:10:47,275 INFO L125 PetriNetUnfolderBase]: For 30327/30327 co-relation queries the response was YES. [2024-01-31 17:10:47,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18619 conditions, 3419 events. 2332/3419 cut-off events. For 30327/30327 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15488 event pairs, 742 based on Foata normal form. 1/3420 useless extension candidates. Maximal degree in co-relation 18521. Up to 3213 conditions per place. [2024-01-31 17:10:47,299 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 210 selfloop transitions, 59 changer transitions 1/271 dead transitions. [2024-01-31 17:10:47,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 271 transitions, 3666 flow [2024-01-31 17:10:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:10:47,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:10:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-01-31 17:10:47,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34032634032634035 [2024-01-31 17:10:47,301 INFO L175 Difference]: Start difference. First operand has 158 places, 225 transitions, 2867 flow. Second operand 13 states and 146 transitions. [2024-01-31 17:10:47,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 271 transitions, 3666 flow [2024-01-31 17:10:47,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 271 transitions, 3382 flow, removed 113 selfloop flow, removed 9 redundant places. [2024-01-31 17:10:47,355 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 2882 flow [2024-01-31 17:10:47,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2882, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-01-31 17:10:47,356 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 131 predicate places. [2024-01-31 17:10:47,356 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 2882 flow [2024-01-31 17:10:47,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.083333333333333) internal successors, (170), 24 states have internal predecessors, (170), 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 17:10:47,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:10:47,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:10:47,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 17:10:47,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:47,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:10:47,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:10:47,565 INFO L85 PathProgramCache]: Analyzing trace with hash 756026548, now seen corresponding path program 14 times [2024-01-31 17:10:47,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:10:47,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433845401] [2024-01-31 17:10:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:10:47,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:10:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:10:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:10:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:10:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433845401] [2024-01-31 17:10:50,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433845401] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:10:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690696606] [2024-01-31 17:10:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:10:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:10:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:10:50,966 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:10:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:10:51,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:10:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:10:51,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:10:51,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:10:54,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:10:54,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:10:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:54,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:10:56,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:10:56,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 87 [2024-01-31 17:10:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:10:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690696606] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:10:57,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:10:57,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 20 [2024-01-31 17:10:57,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998851150] [2024-01-31 17:10:57,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:10:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:10:57,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:10:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:10:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:10:57,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:10:57,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 2882 flow. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 21 states have internal predecessors, (145), 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 17:10:57,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:10:57,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:10:57,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:05,003 INFO L124 PetriNetUnfolderBase]: 2422/3552 cut-off events. [2024-01-31 17:11:05,003 INFO L125 PetriNetUnfolderBase]: For 30990/30990 co-relation queries the response was YES. [2024-01-31 17:11:05,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18796 conditions, 3552 events. 2422/3552 cut-off events. For 30990/30990 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16272 event pairs, 766 based on Foata normal form. 1/3553 useless extension candidates. Maximal degree in co-relation 18694. Up to 3330 conditions per place. [2024-01-31 17:11:05,030 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 216 selfloop transitions, 64 changer transitions 1/282 dead transitions. [2024-01-31 17:11:05,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 282 transitions, 3689 flow [2024-01-31 17:11:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:11:05,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:11:05,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-01-31 17:11:05,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34965034965034963 [2024-01-31 17:11:05,031 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 2882 flow. Second operand 13 states and 150 transitions. [2024-01-31 17:11:05,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 282 transitions, 3689 flow [2024-01-31 17:11:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 282 transitions, 3485 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-01-31 17:11:05,080 INFO L231 Difference]: Finished difference. Result has 170 places, 242 transitions, 2968 flow [2024-01-31 17:11:05,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2968, PETRI_PLACES=170, PETRI_TRANSITIONS=242} [2024-01-31 17:11:05,081 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 137 predicate places. [2024-01-31 17:11:05,081 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 242 transitions, 2968 flow [2024-01-31 17:11:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 21 states have internal predecessors, (145), 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 17:11:05,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:05,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:05,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:11:05,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:05,295 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:05,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1649337012, now seen corresponding path program 15 times [2024-01-31 17:11:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839483552] [2024-01-31 17:11:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:05,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:11:09,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:09,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839483552] [2024-01-31 17:11:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839483552] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907657267] [2024-01-31 17:11:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:11:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:09,851 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:11:09,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:11:10,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:11:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:10,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 17:11:10,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:10,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:11:10,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:10,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:10,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:10,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:10,994 INFO L224 Elim1Store]: Index analysis took 113 ms [2024-01-31 17:11:11,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:11:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:11,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:11:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:11:11,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:11:11,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:11:12,065 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-01-31 17:11:12,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-01-31 17:11:12,632 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:11:12,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:11:14,687 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-01-31 17:11:14,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:11:15,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:11:15,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2024-01-31 17:11:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:16,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:18,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:11:18,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2024-01-31 17:11:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:23,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907657267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:23,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:23,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2024-01-31 17:11:23,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19759098] [2024-01-31 17:11:23,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:23,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:11:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:11:23,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:11:23,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:11:23,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 242 transitions, 2968 flow. Second operand has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 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 17:11:23,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:23,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:11:23,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:11:33,713 INFO L124 PetriNetUnfolderBase]: 2502/3669 cut-off events. [2024-01-31 17:11:33,713 INFO L125 PetriNetUnfolderBase]: For 35003/35003 co-relation queries the response was YES. [2024-01-31 17:11:33,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19626 conditions, 3669 events. 2502/3669 cut-off events. For 35003/35003 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16901 event pairs, 818 based on Foata normal form. 1/3670 useless extension candidates. Maximal degree in co-relation 19521. Up to 3477 conditions per place. [2024-01-31 17:11:33,766 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 220 selfloop transitions, 58 changer transitions 1/280 dead transitions. [2024-01-31 17:11:33,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3802 flow [2024-01-31 17:11:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:11:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:11:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 145 transitions. [2024-01-31 17:11:33,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2024-01-31 17:11:33,767 INFO L175 Difference]: Start difference. First operand has 170 places, 242 transitions, 2968 flow. Second operand 14 states and 145 transitions. [2024-01-31 17:11:33,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3802 flow [2024-01-31 17:11:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 280 transitions, 3598 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-01-31 17:11:33,834 INFO L231 Difference]: Finished difference. Result has 176 places, 248 transitions, 3074 flow [2024-01-31 17:11:33,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3074, PETRI_PLACES=176, PETRI_TRANSITIONS=248} [2024-01-31 17:11:33,835 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 143 predicate places. [2024-01-31 17:11:33,835 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 248 transitions, 3074 flow [2024-01-31 17:11:33,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 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 17:11:33,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:11:33,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:11:33,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:11:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:34,049 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:11:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:11:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1337725168, now seen corresponding path program 16 times [2024-01-31 17:11:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:11:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839977374] [2024-01-31 17:11:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:11:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:11:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:11:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:37,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:11:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839977374] [2024-01-31 17:11:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839977374] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:11:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094234644] [2024-01-31 17:11:37,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:11:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:11:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:11:37,285 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:11:37,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:11:37,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:11:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:11:37,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:11:37,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:11:37,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:11:38,281 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:11:38,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:11:41,417 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-01-31 17:11:41,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:11:42,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-01-31 17:11:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:11:42,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:11:46,570 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse1 (select (select |c_#memory_int#2| c_~A~0.base) (+ .cse0 c_~A~0.offset))) (.cse2 (select (select |c_#memory_int#2| c_~B~0.base) (+ .cse0 ~B~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) (+ .cse0 ~C~0.offset) (+ .cse1 .cse2))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse1 c_~csum~0 .cse2))))) is different from false [2024-01-31 17:11:50,680 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (select (select |c_#memory_int#2| c_~B~0.base) ~B~0.offset)) (.cse1 (select (select |c_#memory_int#2| c_~A~0.base) c_~A~0.offset))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse0 .cse1 c_~csum~0)))) is different from false [2024-01-31 17:11:51,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:11:51,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 118 [2024-01-31 17:11:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-01-31 17:11:54,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094234644] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:11:54,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:11:54,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-01-31 17:11:54,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454272837] [2024-01-31 17:11:54,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:11:54,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:11:54,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:11:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:11:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=589, Unknown=2, NotChecked=102, Total=812 [2024-01-31 17:11:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:11:54,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 248 transitions, 3074 flow. Second operand has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 29 states have internal predecessors, (190), 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 17:11:54,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:11:54,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:11:54,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:06,266 INFO L124 PetriNetUnfolderBase]: 2590/3798 cut-off events. [2024-01-31 17:12:06,266 INFO L125 PetriNetUnfolderBase]: For 38230/38230 co-relation queries the response was YES. [2024-01-31 17:12:06,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20326 conditions, 3798 events. 2590/3798 cut-off events. For 38230/38230 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17682 event pairs, 842 based on Foata normal form. 1/3799 useless extension candidates. Maximal degree in co-relation 20220. Up to 3580 conditions per place. [2024-01-31 17:12:06,295 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 229 selfloop transitions, 61 changer transitions 1/292 dead transitions. [2024-01-31 17:12:06,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 292 transitions, 3910 flow [2024-01-31 17:12:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:12:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:12:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-01-31 17:12:06,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774104683195592 [2024-01-31 17:12:06,296 INFO L175 Difference]: Start difference. First operand has 176 places, 248 transitions, 3074 flow. Second operand 11 states and 137 transitions. [2024-01-31 17:12:06,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 292 transitions, 3910 flow [2024-01-31 17:12:06,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 292 transitions, 3688 flow, removed 77 selfloop flow, removed 10 redundant places. [2024-01-31 17:12:06,376 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3135 flow [2024-01-31 17:12:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3135, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-01-31 17:12:06,377 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 145 predicate places. [2024-01-31 17:12:06,377 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3135 flow [2024-01-31 17:12:06,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.551724137931035) internal successors, (190), 29 states have internal predecessors, (190), 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 17:12:06,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:06,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:06,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 17:12:06,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:06,589 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:06,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1857424490, now seen corresponding path program 17 times [2024-01-31 17:12:06,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:06,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376937961] [2024-01-31 17:12:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:06,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:12:10,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376937961] [2024-01-31 17:12:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376937961] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010142300] [2024-01-31 17:12:10,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:12:10,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:10,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:10,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:12:10,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:12:10,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:12:10,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:12:10,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:12:10,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:15,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:12:15,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:12:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:12:15,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:12:16,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:12:16,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-01-31 17:12:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:12:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010142300] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:12:18,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:12:18,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 22 [2024-01-31 17:12:18,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597440963] [2024-01-31 17:12:18,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:12:18,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:12:18,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:12:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:12:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:12:18,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:12:18,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3135 flow. Second operand has 23 states, 23 states have (on average 6.782608695652174) internal successors, (156), 23 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 17:12:18,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:12:18,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:12:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:27,664 INFO L124 PetriNetUnfolderBase]: 2690/3945 cut-off events. [2024-01-31 17:12:27,664 INFO L125 PetriNetUnfolderBase]: For 40928/40928 co-relation queries the response was YES. [2024-01-31 17:12:27,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21162 conditions, 3945 events. 2690/3945 cut-off events. For 40928/40928 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18523 event pairs, 898 based on Foata normal form. 1/3946 useless extension candidates. Maximal degree in co-relation 21055. Up to 3765 conditions per place. [2024-01-31 17:12:27,727 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 235 selfloop transitions, 57 changer transitions 1/294 dead transitions. [2024-01-31 17:12:27,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 294 transitions, 3980 flow [2024-01-31 17:12:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:12:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:12:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-01-31 17:12:27,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32634032634032634 [2024-01-31 17:12:27,728 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3135 flow. Second operand 13 states and 140 transitions. [2024-01-31 17:12:27,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 294 transitions, 3980 flow [2024-01-31 17:12:27,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 294 transitions, 3756 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-01-31 17:12:27,789 INFO L231 Difference]: Finished difference. Result has 186 places, 264 transitions, 3248 flow [2024-01-31 17:12:27,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3248, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2024-01-31 17:12:27,789 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 153 predicate places. [2024-01-31 17:12:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 3248 flow [2024-01-31 17:12:27,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.782608695652174) internal successors, (156), 23 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 17:12:27,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:27,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:27,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:12:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-31 17:12:28,002 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:28,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:28,002 INFO L85 PathProgramCache]: Analyzing trace with hash 693178800, now seen corresponding path program 18 times [2024-01-31 17:12:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:28,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478478183] [2024-01-31 17:12:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:28,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:12:31,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478478183] [2024-01-31 17:12:31,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478478183] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471469813] [2024-01-31 17:12:31,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:12:31,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:31,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:31,513 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:12:31,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:12:31,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:12:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:12:31,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-31 17:12:31,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:35,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:12:35,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:12:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:12:35,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:12:36,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:12:36,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-01-31 17:12:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:12:39,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471469813] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:12:39,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:12:39,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2024-01-31 17:12:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803123929] [2024-01-31 17:12:39,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:12:39,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:12:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:12:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:12:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:12:39,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:12:39,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 3248 flow. Second operand has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 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 17:12:39,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:12:39,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:12:39,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:12:47,435 INFO L124 PetriNetUnfolderBase]: 2790/4092 cut-off events. [2024-01-31 17:12:47,435 INFO L125 PetriNetUnfolderBase]: For 44265/44265 co-relation queries the response was YES. [2024-01-31 17:12:47,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 4092 events. 2790/4092 cut-off events. For 44265/44265 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19371 event pairs, 934 based on Foata normal form. 1/4093 useless extension candidates. Maximal degree in co-relation 21868. Up to 3912 conditions per place. [2024-01-31 17:12:47,465 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 247 selfloop transitions, 57 changer transitions 1/306 dead transitions. [2024-01-31 17:12:47,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 4143 flow [2024-01-31 17:12:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:12:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:12:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-01-31 17:12:47,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331002331002331 [2024-01-31 17:12:47,468 INFO L175 Difference]: Start difference. First operand has 186 places, 264 transitions, 3248 flow. Second operand 13 states and 142 transitions. [2024-01-31 17:12:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 4143 flow [2024-01-31 17:12:47,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 306 transitions, 3933 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-01-31 17:12:47,593 INFO L231 Difference]: Finished difference. Result has 194 places, 274 transitions, 3396 flow [2024-01-31 17:12:47,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3396, PETRI_PLACES=194, PETRI_TRANSITIONS=274} [2024-01-31 17:12:47,593 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 161 predicate places. [2024-01-31 17:12:47,593 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 274 transitions, 3396 flow [2024-01-31 17:12:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 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 17:12:47,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:12:47,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:12:47,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 17:12:47,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-31 17:12:47,811 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:12:47,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:12:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash -412565900, now seen corresponding path program 19 times [2024-01-31 17:12:47,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:12:47,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374086502] [2024-01-31 17:12:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:12:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:12:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:12:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:12:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374086502] [2024-01-31 17:12:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374086502] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:12:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831198401] [2024-01-31 17:12:52,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:12:52,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:12:52,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:12:52,255 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:12:52,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:12:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:12:52,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-31 17:12:52,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:12:52,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:12:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:52,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:53,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:53,344 INFO L224 Elim1Store]: Index analysis took 104 ms [2024-01-31 17:12:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:12:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:53,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:12:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:12:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:12:53,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:12:54,452 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-01-31 17:12:54,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-01-31 17:12:55,105 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-31 17:12:55,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-01-31 17:12:57,927 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-01-31 17:12:57,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-01-31 17:12:59,191 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:12:59,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-01-31 17:12:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:12:59,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:13:00,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:13:00,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2024-01-31 17:13:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:06,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831198401] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:13:06,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:13:06,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-01-31 17:13:06,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979223506] [2024-01-31 17:13:06,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:13:06,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-31 17:13:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:13:06,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-31 17:13:06,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2024-01-31 17:13:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:13:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 274 transitions, 3396 flow. Second operand has 31 states, 31 states have (on average 6.193548387096774) internal successors, (192), 31 states have internal predecessors, (192), 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 17:13:06,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:13:06,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:13:06,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:13:19,562 INFO L124 PetriNetUnfolderBase]: 2888/4235 cut-off events. [2024-01-31 17:13:19,562 INFO L125 PetriNetUnfolderBase]: For 50051/50051 co-relation queries the response was YES. [2024-01-31 17:13:19,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23009 conditions, 4235 events. 2888/4235 cut-off events. For 50051/50051 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20202 event pairs, 964 based on Foata normal form. 1/4236 useless extension candidates. Maximal degree in co-relation 22891. Up to 4059 conditions per place. [2024-01-31 17:13:19,591 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 255 selfloop transitions, 56 changer transitions 1/313 dead transitions. [2024-01-31 17:13:19,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 313 transitions, 4377 flow [2024-01-31 17:13:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:13:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:13:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-01-31 17:13:19,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2024-01-31 17:13:19,599 INFO L175 Difference]: Start difference. First operand has 194 places, 274 transitions, 3396 flow. Second operand 14 states and 143 transitions. [2024-01-31 17:13:19,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 313 transitions, 4377 flow [2024-01-31 17:13:19,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 313 transitions, 4151 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-01-31 17:13:19,693 INFO L231 Difference]: Finished difference. Result has 201 places, 283 transitions, 3578 flow [2024-01-31 17:13:19,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3578, PETRI_PLACES=201, PETRI_TRANSITIONS=283} [2024-01-31 17:13:19,693 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 168 predicate places. [2024-01-31 17:13:19,693 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 283 transitions, 3578 flow [2024-01-31 17:13:19,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.193548387096774) internal successors, (192), 31 states have internal predecessors, (192), 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 17:13:19,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:13:19,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:13:19,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 17:13:19,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 17:13:19,908 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:13:19,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:13:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 802540050, now seen corresponding path program 20 times [2024-01-31 17:13:19,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:13:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361807878] [2024-01-31 17:13:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:13:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:13:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:13:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361807878] [2024-01-31 17:13:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361807878] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438898875] [2024-01-31 17:13:24,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:13:24,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:24,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:24,322 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:13:24,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:13:24,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:13:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:13:24,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2024-01-31 17:13:24,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:24,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-01-31 17:13:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:24,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:24,756 INFO L224 Elim1Store]: Index analysis took 112 ms [2024-01-31 17:13:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:24,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:13:24,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:24,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:24,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:24,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:25,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:25,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:25,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:25,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:26,319 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-01-31 17:13:26,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-01-31 17:13:26,964 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:13:26,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:13:29,384 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-01-31 17:13:29,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:13:30,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:13:30,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 96 [2024-01-31 17:13:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:30,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:13:32,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:13:32,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2024-01-31 17:13:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438898875] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:13:36,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:13:36,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2024-01-31 17:13:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319657177] [2024-01-31 17:13:36,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:13:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:13:36,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:13:36,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:13:36,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:13:36,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:13:36,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 283 transitions, 3578 flow. Second operand has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 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 17:13:36,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:13:36,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:13:36,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:13:46,276 INFO L124 PetriNetUnfolderBase]: 2968/4352 cut-off events. [2024-01-31 17:13:46,277 INFO L125 PetriNetUnfolderBase]: For 56214/56214 co-relation queries the response was YES. [2024-01-31 17:13:46,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 4352 events. 2968/4352 cut-off events. For 56214/56214 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20923 event pairs, 1006 based on Foata normal form. 1/4353 useless extension candidates. Maximal degree in co-relation 23672. Up to 4186 conditions per place. [2024-01-31 17:13:46,306 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 259 selfloop transitions, 56 changer transitions 1/317 dead transitions. [2024-01-31 17:13:46,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 317 transitions, 4516 flow [2024-01-31 17:13:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:13:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:13:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-01-31 17:13:46,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051948051948052 [2024-01-31 17:13:46,308 INFO L175 Difference]: Start difference. First operand has 201 places, 283 transitions, 3578 flow. Second operand 14 states and 141 transitions. [2024-01-31 17:13:46,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 317 transitions, 4516 flow [2024-01-31 17:13:46,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 317 transitions, 4210 flow, removed 123 selfloop flow, removed 9 redundant places. [2024-01-31 17:13:46,410 INFO L231 Difference]: Finished difference. Result has 207 places, 289 transitions, 3632 flow [2024-01-31 17:13:46,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3632, PETRI_PLACES=207, PETRI_TRANSITIONS=289} [2024-01-31 17:13:46,410 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 174 predicate places. [2024-01-31 17:13:46,411 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 289 transitions, 3632 flow [2024-01-31 17:13:46,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.153846153846154) internal successors, (160), 26 states have internal predecessors, (160), 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 17:13:46,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:13:46,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:13:46,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 17:13:46,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:46,618 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:13:46,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:13:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash -617752336, now seen corresponding path program 21 times [2024-01-31 17:13:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:13:46,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380800981] [2024-01-31 17:13:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:13:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:13:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:13:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:13:50,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:13:50,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380800981] [2024-01-31 17:13:50,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380800981] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:13:50,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084610373] [2024-01-31 17:13:50,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:13:50,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:13:50,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:13:50,642 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:13:50,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:13:50,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:13:50,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:13:50,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 57 conjunts are in the unsatisfiable core [2024-01-31 17:13:50,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:13:50,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:13:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:50,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:51,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:51,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:13:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:51,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:52,081 INFO L224 Elim1Store]: Index analysis took 121 ms [2024-01-31 17:13:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:52,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:13:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:52,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:52,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:13:52,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:13:52,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:13:52,788 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-01-31 17:13:52,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-01-31 17:13:53,615 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-01-31 17:13:53,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-01-31 17:13:57,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2024-01-31 17:13:59,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-01-31 17:13:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:13:59,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:14:00,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:14:00,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 215 [2024-01-31 17:14:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:14:07,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084610373] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:14:07,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:14:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2024-01-31 17:14:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414358860] [2024-01-31 17:14:07,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:14:07,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:14:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:14:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:14:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2024-01-31 17:14:07,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:14:07,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 289 transitions, 3632 flow. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 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 17:14:07,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:14:07,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:14:07,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:14:18,504 INFO L124 PetriNetUnfolderBase]: 3048/4469 cut-off events. [2024-01-31 17:14:18,504 INFO L125 PetriNetUnfolderBase]: For 60705/60705 co-relation queries the response was YES. [2024-01-31 17:14:18,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24451 conditions, 4469 events. 3048/4469 cut-off events. For 60705/60705 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21578 event pairs, 1040 based on Foata normal form. 1/4470 useless extension candidates. Maximal degree in co-relation 24329. Up to 4303 conditions per place. [2024-01-31 17:14:18,536 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 265 selfloop transitions, 56 changer transitions 1/323 dead transitions. [2024-01-31 17:14:18,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 323 transitions, 4594 flow [2024-01-31 17:14:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:14:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:14:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 141 transitions. [2024-01-31 17:14:18,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051948051948052 [2024-01-31 17:14:18,537 INFO L175 Difference]: Start difference. First operand has 207 places, 289 transitions, 3632 flow. Second operand 14 states and 141 transitions. [2024-01-31 17:14:18,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 323 transitions, 4594 flow [2024-01-31 17:14:18,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 323 transitions, 4322 flow, removed 104 selfloop flow, removed 10 redundant places. [2024-01-31 17:14:18,677 INFO L231 Difference]: Finished difference. Result has 212 places, 295 transitions, 3732 flow [2024-01-31 17:14:18,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3732, PETRI_PLACES=212, PETRI_TRANSITIONS=295} [2024-01-31 17:14:18,682 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 179 predicate places. [2024-01-31 17:14:18,682 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 295 transitions, 3732 flow [2024-01-31 17:14:18,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 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 17:14:18,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:14:18,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:14:18,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 17:14:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:14:18,887 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:14:18,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:14:18,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1089508402, now seen corresponding path program 22 times [2024-01-31 17:14:18,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:14:18,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735412394] [2024-01-31 17:14:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:14:18,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:14:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:14:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:14:22,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:14:22,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735412394] [2024-01-31 17:14:22,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735412394] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:14:22,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573493590] [2024-01-31 17:14:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:14:22,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:14:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:14:22,184 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:14:22,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 17:14:22,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:14:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:14:22,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:14:22,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:14:22,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:14:23,186 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:14:23,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:14:26,383 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-01-31 17:14:26,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:14:26,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-01-31 17:14:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:14:26,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:14:31,536 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse1 (select (select |c_#memory_int#2| c_~A~0.base) (+ .cse0 c_~A~0.offset))) (.cse2 (select (select |c_#memory_int#2| c_~B~0.base) (+ .cse0 ~B~0.offset)))) (= (+ c_~asum~0 c_~bsum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) (+ .cse0 ~C~0.offset) (+ .cse1 .cse2))) c_~B~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) ~B~0.offset))) (+ .cse1 c_~csum~0 .cse2))))) is different from false [2024-01-31 17:14:32,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:14:32,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 134 [2024-01-31 17:14:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-01-31 17:14:37,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573493590] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:14:37,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:14:37,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-01-31 17:14:37,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829948593] [2024-01-31 17:14:37,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:14:37,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-31 17:14:37,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:14:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-31 17:14:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=620, Unknown=1, NotChecked=52, Total=812 [2024-01-31 17:14:37,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:14:37,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 295 transitions, 3732 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 17:14:37,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:14:37,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:14:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:14:47,737 INFO L124 PetriNetUnfolderBase]: 3150/4618 cut-off events. [2024-01-31 17:14:47,737 INFO L125 PetriNetUnfolderBase]: For 65755/65755 co-relation queries the response was YES. [2024-01-31 17:14:47,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25477 conditions, 4618 events. 3150/4618 cut-off events. For 65755/65755 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22508 event pairs, 1080 based on Foata normal form. 1/4619 useless extension candidates. Maximal degree in co-relation 25352. Up to 4438 conditions per place. [2024-01-31 17:14:47,772 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 280 selfloop transitions, 54 changer transitions 1/336 dead transitions. [2024-01-31 17:14:47,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 336 transitions, 4789 flow [2024-01-31 17:14:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:14:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:14:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-01-31 17:14:47,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608815426997245 [2024-01-31 17:14:47,773 INFO L175 Difference]: Start difference. First operand has 212 places, 295 transitions, 3732 flow. Second operand 11 states and 131 transitions. [2024-01-31 17:14:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 336 transitions, 4789 flow [2024-01-31 17:14:47,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 336 transitions, 4505 flow, removed 110 selfloop flow, removed 10 redundant places. [2024-01-31 17:14:47,915 INFO L231 Difference]: Finished difference. Result has 215 places, 304 transitions, 3885 flow [2024-01-31 17:14:47,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3885, PETRI_PLACES=215, PETRI_TRANSITIONS=304} [2024-01-31 17:14:47,916 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 182 predicate places. [2024-01-31 17:14:47,916 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 304 transitions, 3885 flow [2024-01-31 17:14:47,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 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 17:14:47,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:14:47,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:14:47,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-31 17:14:48,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:14:48,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:14:48,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:14:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash -942186772, now seen corresponding path program 23 times [2024-01-31 17:14:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:14:48,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190786617] [2024-01-31 17:14:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:14:48,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:14:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:14:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:14:52,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:14:52,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190786617] [2024-01-31 17:14:52,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190786617] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:14:52,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831809484] [2024-01-31 17:14:52,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:14:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:14:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:14:52,968 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:14:52,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 17:14:53,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:14:53,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:14:53,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-31 17:14:53,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:14:56,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:14:56,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-01-31 17:14:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:14:56,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:14:58,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:14:58,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 95 [2024-01-31 17:14:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:14:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831809484] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:14:59,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:14:59,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 21 [2024-01-31 17:14:59,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893713902] [2024-01-31 17:14:59,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:14:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:14:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:14:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:14:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:14:59,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:14:59,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 304 transitions, 3885 flow. Second operand has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 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 17:14:59,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:14:59,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:14:59,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:11,296 INFO L124 PetriNetUnfolderBase]: 3240/4751 cut-off events. [2024-01-31 17:15:11,296 INFO L125 PetriNetUnfolderBase]: For 68762/68762 co-relation queries the response was YES. [2024-01-31 17:15:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26166 conditions, 4751 events. 3240/4751 cut-off events. For 68762/68762 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23271 event pairs, 1124 based on Foata normal form. 1/4752 useless extension candidates. Maximal degree in co-relation 26039. Up to 4567 conditions per place. [2024-01-31 17:15:11,369 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 285 selfloop transitions, 57 changer transitions 1/344 dead transitions. [2024-01-31 17:15:11,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 344 transitions, 4837 flow [2024-01-31 17:15:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:15:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:15:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 152 transitions. [2024-01-31 17:15:11,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30707070707070705 [2024-01-31 17:15:11,370 INFO L175 Difference]: Start difference. First operand has 215 places, 304 transitions, 3885 flow. Second operand 15 states and 152 transitions. [2024-01-31 17:15:11,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 344 transitions, 4837 flow [2024-01-31 17:15:11,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 344 transitions, 4553 flow, removed 114 selfloop flow, removed 6 redundant places. [2024-01-31 17:15:11,512 INFO L231 Difference]: Finished difference. Result has 225 places, 310 transitions, 3912 flow [2024-01-31 17:15:11,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3912, PETRI_PLACES=225, PETRI_TRANSITIONS=310} [2024-01-31 17:15:11,527 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 192 predicate places. [2024-01-31 17:15:11,527 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 310 transitions, 3912 flow [2024-01-31 17:15:11,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.863636363636363) internal successors, (151), 22 states have internal predecessors, (151), 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 17:15:11,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:11,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:11,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:11,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:11,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:11,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 271020016, now seen corresponding path program 24 times [2024-01-31 17:15:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:11,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352516973] [2024-01-31 17:15:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:15:16,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:16,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352516973] [2024-01-31 17:15:16,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352516973] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:16,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976870001] [2024-01-31 17:15:16,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:15:16,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:16,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:16,159 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:16,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 17:15:16,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:15:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:15:16,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-31 17:15:16,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:16,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-01-31 17:15:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:16,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:15:16,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:15:16,863 INFO L224 Elim1Store]: Index analysis took 125 ms [2024-01-31 17:15:16,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:15:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:16,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:15:17,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:17,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:15:17,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:15:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:15:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:15:17,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:15:18,283 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-01-31 17:15:18,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-01-31 17:15:18,822 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-31 17:15:18,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-01-31 17:15:20,572 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:15:20,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-01-31 17:15:22,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:15:22,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-01-31 17:15:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:15:22,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:24,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:15:24,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 199 [2024-01-31 17:15:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:15:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976870001] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:15:34,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:15:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-01-31 17:15:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926645109] [2024-01-31 17:15:34,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:15:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:15:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:15:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:15:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:15:34,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:15:34,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 310 transitions, 3912 flow. Second operand has 25 states, 25 states have (on average 6.2) internal successors, (155), 25 states have internal predecessors, (155), 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 17:15:34,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:15:34,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:15:34,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:15:44,213 INFO L124 PetriNetUnfolderBase]: 3358/4922 cut-off events. [2024-01-31 17:15:44,214 INFO L125 PetriNetUnfolderBase]: For 76000/76000 co-relation queries the response was YES. [2024-01-31 17:15:44,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27371 conditions, 4922 events. 3358/4922 cut-off events. For 76000/76000 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24259 event pairs, 1154 based on Foata normal form. 1/4923 useless extension candidates. Maximal degree in co-relation 27238. Up to 4724 conditions per place. [2024-01-31 17:15:44,249 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 287 selfloop transitions, 63 changer transitions 1/352 dead transitions. [2024-01-31 17:15:44,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 352 transitions, 5132 flow [2024-01-31 17:15:44,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:15:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:15:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-01-31 17:15:44,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2024-01-31 17:15:44,250 INFO L175 Difference]: Start difference. First operand has 225 places, 310 transitions, 3912 flow. Second operand 14 states and 143 transitions. [2024-01-31 17:15:44,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 352 transitions, 5132 flow [2024-01-31 17:15:44,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 352 transitions, 4882 flow, removed 72 selfloop flow, removed 12 redundant places. [2024-01-31 17:15:44,417 INFO L231 Difference]: Finished difference. Result has 228 places, 323 transitions, 4255 flow [2024-01-31 17:15:44,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4255, PETRI_PLACES=228, PETRI_TRANSITIONS=323} [2024-01-31 17:15:44,418 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 195 predicate places. [2024-01-31 17:15:44,418 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 323 transitions, 4255 flow [2024-01-31 17:15:44,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.2) internal successors, (155), 25 states have internal predecessors, (155), 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 17:15:44,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:15:44,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:15:44,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-01-31 17:15:44,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:44,630 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:15:44,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:15:44,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1085006224, now seen corresponding path program 25 times [2024-01-31 17:15:44,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:15:44,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121256542] [2024-01-31 17:15:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:15:44,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:15:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:15:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:15:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121256542] [2024-01-31 17:15:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121256542] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:15:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749180810] [2024-01-31 17:15:48,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:15:48,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:15:48,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:15:48,806 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:15:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 17:15:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:15:49,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2024-01-31 17:15:49,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:15:49,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:15:49,895 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-31 17:15:49,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-01-31 17:15:53,171 INFO L349 Elim1Store]: treesize reduction 31, result has 32.6 percent of original size [2024-01-31 17:15:53,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2024-01-31 17:15:54,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-01-31 17:15:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:15:54,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:15:59,016 WARN L854 $PredicateComparison]: unable to prove that (forall ((~C~0.offset Int) (~B~0.offset Int)) (let ((.cse0 (* 4 |c_thread3Thread1of1ForFork0_~i~2#1|))) (let ((.cse1 (select (select |c_#memory_int#2| c_~A~0.base) (+ .cse0 c_~A~0.offset))) (.cse2 (select (select |c_#memory_int#2| c_~B~0.base) (+ .cse0 ~B~0.offset)))) (= (+ c_~asum~0 (select (select (store |c_#memory_int#2| c_~C~0.base (store (select |c_#memory_int#2| c_~C~0.base) (+ .cse0 ~C~0.offset) (+ .cse1 .cse2))) c_~B~0.base) ~B~0.offset) c_~bsum~0) (+ .cse1 c_~csum~0 .cse2))))) is different from false [2024-01-31 17:15:59,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:15:59,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 118 [2024-01-31 17:16:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-01-31 17:16:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749180810] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:03,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:03,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2024-01-31 17:16:03,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774291427] [2024-01-31 17:16:03,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:03,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-31 17:16:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-31 17:16:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=685, Unknown=1, NotChecked=54, Total=870 [2024-01-31 17:16:03,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:16:03,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 323 transitions, 4255 flow. Second operand has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 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 17:16:03,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:03,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:16:03,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:15,670 INFO L124 PetriNetUnfolderBase]: 3502/5131 cut-off events. [2024-01-31 17:16:15,671 INFO L125 PetriNetUnfolderBase]: For 89501/89501 co-relation queries the response was YES. [2024-01-31 17:16:15,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29253 conditions, 5131 events. 3502/5131 cut-off events. For 89501/89501 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 25521 event pairs, 1166 based on Foata normal form. 1/5132 useless extension candidates. Maximal degree in co-relation 29119. Up to 4825 conditions per place. [2024-01-31 17:16:15,772 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 290 selfloop transitions, 75 changer transitions 1/367 dead transitions. [2024-01-31 17:16:15,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 367 transitions, 5499 flow [2024-01-31 17:16:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:16:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:16:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-01-31 17:16:15,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34032634032634035 [2024-01-31 17:16:15,773 INFO L175 Difference]: Start difference. First operand has 228 places, 323 transitions, 4255 flow. Second operand 13 states and 146 transitions. [2024-01-31 17:16:15,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 367 transitions, 5499 flow [2024-01-31 17:16:16,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 367 transitions, 5049 flow, removed 195 selfloop flow, removed 8 redundant places. [2024-01-31 17:16:16,029 INFO L231 Difference]: Finished difference. Result has 234 places, 333 transitions, 4401 flow [2024-01-31 17:16:16,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4401, PETRI_PLACES=234, PETRI_TRANSITIONS=333} [2024-01-31 17:16:16,029 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 201 predicate places. [2024-01-31 17:16:16,029 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 333 transitions, 4401 flow [2024-01-31 17:16:16,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.266666666666667) internal successors, (188), 30 states have internal predecessors, (188), 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 17:16:16,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:16,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:16,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 17:16:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:16,242 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:16,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1910722582, now seen corresponding path program 26 times [2024-01-31 17:16:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:16,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36191709] [2024-01-31 17:16:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:16,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:16:20,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36191709] [2024-01-31 17:16:20,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36191709] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:20,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199210086] [2024-01-31 17:16:20,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:16:20,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:20,269 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:20,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 17:16:20,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:16:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:20,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-31 17:16:20,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:20,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-01-31 17:16:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:20,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:20,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:20,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:21,214 INFO L224 Elim1Store]: Index analysis took 118 ms [2024-01-31 17:16:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:16:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:21,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:21,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:21,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:21,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:22,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:22,388 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-01-31 17:16:22,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-01-31 17:16:22,880 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-31 17:16:22,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-01-31 17:16:24,720 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:16:24,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-01-31 17:16:26,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:16:26,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-01-31 17:16:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:16:27,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:16:28,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:16:28,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 199 [2024-01-31 17:16:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:16:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199210086] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:16:35,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:16:35,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-01-31 17:16:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899593784] [2024-01-31 17:16:35,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:16:35,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:16:35,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:16:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:16:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:16:35,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2024-01-31 17:16:35,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 333 transitions, 4401 flow. Second operand has 25 states, 25 states have (on average 6.28) internal successors, (157), 25 states have internal predecessors, (157), 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 17:16:35,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:16:35,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2024-01-31 17:16:35,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:16:48,919 INFO L124 PetriNetUnfolderBase]: 3646/5340 cut-off events. [2024-01-31 17:16:48,919 INFO L125 PetriNetUnfolderBase]: For 102172/102172 co-relation queries the response was YES. [2024-01-31 17:16:48,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30886 conditions, 5340 events. 3646/5340 cut-off events. For 102172/102172 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26726 event pairs, 1200 based on Foata normal form. 1/5341 useless extension candidates. Maximal degree in co-relation 30748. Up to 5046 conditions per place. [2024-01-31 17:16:48,965 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 301 selfloop transitions, 72 changer transitions 1/375 dead transitions. [2024-01-31 17:16:48,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 375 transitions, 5676 flow [2024-01-31 17:16:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:16:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:16:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-01-31 17:16:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-01-31 17:16:48,966 INFO L175 Difference]: Start difference. First operand has 234 places, 333 transitions, 4401 flow. Second operand 14 states and 147 transitions. [2024-01-31 17:16:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 375 transitions, 5676 flow [2024-01-31 17:16:49,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 375 transitions, 5214 flow, removed 191 selfloop flow, removed 8 redundant places. [2024-01-31 17:16:49,243 INFO L231 Difference]: Finished difference. Result has 241 places, 343 transitions, 4550 flow [2024-01-31 17:16:49,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4550, PETRI_PLACES=241, PETRI_TRANSITIONS=343} [2024-01-31 17:16:49,244 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 208 predicate places. [2024-01-31 17:16:49,244 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 343 transitions, 4550 flow [2024-01-31 17:16:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.28) internal successors, (157), 25 states have internal predecessors, (157), 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 17:16:49,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:16:49,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:16:49,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-31 17:16:49,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:49,456 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:16:49,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:16:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1279318000, now seen corresponding path program 27 times [2024-01-31 17:16:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:16:49,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151588492] [2024-01-31 17:16:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:16:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:16:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:16:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:16:54,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:16:54,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151588492] [2024-01-31 17:16:54,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151588492] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:16:54,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291975322] [2024-01-31 17:16:54,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:16:54,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:16:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:16:54,347 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:16:54,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 17:16:54,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:16:54,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:16:54,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 55 conjunts are in the unsatisfiable core [2024-01-31 17:16:54,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:16:54,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-01-31 17:16:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:54,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:54,849 INFO L224 Elim1Store]: Index analysis took 113 ms [2024-01-31 17:16:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:54,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2024-01-31 17:16:54,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:54,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:54,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:55,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:55,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:55,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:55,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:55,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:55,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-01-31 17:16:55,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:55,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:56,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-01-31 17:16:56,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-01-31 17:16:56,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-01-31 17:16:56,453 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-01-31 17:16:56,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-01-31 17:16:56,959 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-01-31 17:16:56,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-01-31 17:16:58,589 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:16:58,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2024-01-31 17:17:00,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:00,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2024-01-31 17:17:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:17:00,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:02,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:17:02,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 199 Killed by 15