./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longer-2.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-2.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 18:59:24,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 18:59:24,962 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 18:59:24,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 18:59:24,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 18:59:24,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 18:59:24,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 18:59:24,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 18:59:24,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 18:59:24,995 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 18:59:24,995 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 18:59:24,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 18:59:24,996 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 18:59:24,997 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 18:59:24,997 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 18:59:24,998 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 18:59:24,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 18:59:24,998 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 18:59:24,998 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 18:59:24,998 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 18:59:24,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 18:59:24,999 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 18:59:24,999 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 18:59:24,999 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 18:59:24,999 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 18:59:25,000 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 18:59:25,000 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 18:59:25,001 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 18:59:25,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 18:59:25,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 18:59:25,002 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 18:59:25,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 18:59:25,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:25,003 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 18:59:25,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 18:59:25,004 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 18:59:25,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 18:59:25,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 18:59:25,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 18:59:25,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 18:59:25,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 18:59:25,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 18:59:25,327 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 18:59:25,328 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 18:59:25,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/stack_longer-2.yml/witness.yml [2024-02-07 18:59:25,421 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 18:59:25,421 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 18:59:25,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-2.i [2024-02-07 18:59:26,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 18:59:27,026 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 18:59:27,036 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i [2024-02-07 18:59:27,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c052a686/c8a74c422a4b43478770fd987b81f86b/FLAG098906744 [2024-02-07 18:59:27,067 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c052a686/c8a74c422a4b43478770fd987b81f86b [2024-02-07 18:59:27,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 18:59:27,068 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 18:59:27,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:27,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 18:59:27,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 18:59:27,075 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:25" (1/2) ... [2024-02-07 18:59:27,076 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e80e1d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,076 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:25" (1/2) ... [2024-02-07 18:59:27,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b739df6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e80e1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27, skipping insertion in model container [2024-02-07 18:59:27,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 06:59:27" (2/2) ... [2024-02-07 18:59:27,078 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 18:59:27,082 INFO L71 edCorrectnessWitness]: Witness did not contain any usable entries. [2024-02-07 18:59:27,120 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 18:59:27,468 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2024-02-07 18:59:27,504 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:27,517 INFO L206 MainTranslator]: Completed pre-run [2024-02-07 18:59:27,555 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-2.i[41529,41542] [2024-02-07 18:59:27,575 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 18:59:27,631 INFO L211 MainTranslator]: Completed translation [2024-02-07 18:59:27,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27 WrapperNode [2024-02-07 18:59:27,632 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 18:59:27,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:27,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 18:59:27,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 18:59:27,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,702 INFO L138 Inliner]: procedures = 278, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2024-02-07 18:59:27,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 18:59:27,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 18:59:27,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 18:59:27,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 18:59:27,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,723 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,737 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 5, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0, 0]. The 4 writes are split as follows [0, 1, 0, 2, 1]. [2024-02-07 18:59:27,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,746 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,749 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 18:59:27,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 18:59:27,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 18:59:27,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 18:59:27,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (1/1) ... [2024-02-07 18:59:27,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 18:59:27,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:27,793 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) [2024-02-07 18:59:27,798 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 [2024-02-07 18:59:27,820 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-07 18:59:27,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-07 18:59:27,821 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 18:59:27,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 18:59:27,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 18:59:27,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 18:59:27,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 18:59:27,825 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 18:59:27,946 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 18:59:27,948 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 18:59:28,143 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 18:59:28,143 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 18:59:28,306 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 18:59:28,306 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 18:59:28,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:28 BoogieIcfgContainer [2024-02-07 18:59:28,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 18:59:28,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 18:59:28,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 18:59:28,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 18:59:28,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 06:59:25" (1/4) ... [2024-02-07 18:59:28,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e728de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 06:59:28, skipping insertion in model container [2024-02-07 18:59:28,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 06:59:27" (2/4) ... [2024-02-07 18:59:28,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e728de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:59:28, skipping insertion in model container [2024-02-07 18:59:28,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 06:59:27" (3/4) ... [2024-02-07 18:59:28,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e728de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 06:59:28, skipping insertion in model container [2024-02-07 18:59:28,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 06:59:28" (4/4) ... [2024-02-07 18:59:28,315 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2024-02-07 18:59:28,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 18:59:28,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 18:59:28,330 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 18:59:28,396 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 18:59:28,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-02-07 18:59:28,457 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-02-07 18:59:28,457 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 18:59:28,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-02-07 18:59:28,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-02-07 18:59:28,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-02-07 18:59:28,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 18:59:28,487 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;@5fd11069, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 18:59:28,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-07 18:59:28,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 18:59:28,496 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-07 18:59:28,496 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 18:59:28,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:28,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:28,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:28,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash -28897917, now seen corresponding path program 1 times [2024-02-07 18:59:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:28,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444665107] [2024-02-07 18:59:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:28,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:28,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444665107] [2024-02-07 18:59:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444665107] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:28,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145457717] [2024-02-07 18:59:28,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:28,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 18:59:28,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 18:59:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 18:59:28,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 18:59:28,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:28,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:28,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 18:59:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:29,179 INFO L124 PetriNetUnfolderBase]: 321/604 cut-off events. [2024-02-07 18:59:29,180 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-07 18:59:29,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 604 events. 321/604 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2742 event pairs, 57 based on Foata normal form. 45/610 useless extension candidates. Maximal degree in co-relation 1056. Up to 375 conditions per place. [2024-02-07 18:59:29,190 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 42 selfloop transitions, 3 changer transitions 3/54 dead transitions. [2024-02-07 18:59:29,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 54 transitions, 222 flow [2024-02-07 18:59:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 18:59:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 18:59:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-02-07 18:59:29,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-02-07 18:59:29,205 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 85 transitions. [2024-02-07 18:59:29,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 54 transitions, 222 flow [2024-02-07 18:59:29,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 54 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 18:59:29,214 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 84 flow [2024-02-07 18:59:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-02-07 18:59:29,222 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-02-07 18:59:29,222 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 84 flow [2024-02-07 18:59:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:29,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:29,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 18:59:29,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:29,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 994745822, now seen corresponding path program 1 times [2024-02-07 18:59:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:29,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628757463] [2024-02-07 18:59:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:29,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628757463] [2024-02-07 18:59:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628757463] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:29,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534807229] [2024-02-07 18:59:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:29,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:29,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:29,400 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) [2024-02-07 18:59:29,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 18:59:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:29,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 18:59:29,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:29,600 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 8 treesize of output 1 [2024-02-07 18:59:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:29,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534807229] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:29,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:29,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-02-07 18:59:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047987788] [2024-02-07 18:59:29,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 18:59:29,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 18:59:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-02-07 18:59:29,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:29,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 84 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2024-02-07 18:59:29,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:29,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:29,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,346 INFO L124 PetriNetUnfolderBase]: 1316/2465 cut-off events. [2024-02-07 18:59:30,346 INFO L125 PetriNetUnfolderBase]: For 306/308 co-relation queries the response was YES. [2024-02-07 18:59:30,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5171 conditions, 2465 events. 1316/2465 cut-off events. For 306/308 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 13405 event pairs, 164 based on Foata normal form. 52/2411 useless extension candidates. Maximal degree in co-relation 4582. Up to 383 conditions per place. [2024-02-07 18:59:30,357 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 168 selfloop transitions, 32 changer transitions 6/211 dead transitions. [2024-02-07 18:59:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 211 transitions, 928 flow [2024-02-07 18:59:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 18:59:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 18:59:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 320 transitions. [2024-02-07 18:59:30,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-02-07 18:59:30,365 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 84 flow. Second operand 15 states and 320 transitions. [2024-02-07 18:59:30,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 211 transitions, 928 flow [2024-02-07 18:59:30,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 211 transitions, 924 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 18:59:30,370 INFO L231 Difference]: Finished difference. Result has 55 places, 67 transitions, 331 flow [2024-02-07 18:59:30,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=331, PETRI_PLACES=55, PETRI_TRANSITIONS=67} [2024-02-07 18:59:30,370 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2024-02-07 18:59:30,371 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 67 transitions, 331 flow [2024-02-07 18:59:30,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2024-02-07 18:59:30,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:30,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:30,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 134985196, now seen corresponding path program 1 times [2024-02-07 18:59:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152006531] [2024-02-07 18:59:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:30,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:30,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152006531] [2024-02-07 18:59:30,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152006531] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:30,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:30,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 18:59:30,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22983955] [2024-02-07 18:59:30,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:30,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 18:59:30,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:30,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 18:59:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 18:59:30,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 18:59:30,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 67 transitions, 331 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:30,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:30,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 18:59:30,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:30,861 INFO L124 PetriNetUnfolderBase]: 716/1463 cut-off events. [2024-02-07 18:59:30,861 INFO L125 PetriNetUnfolderBase]: For 615/615 co-relation queries the response was YES. [2024-02-07 18:59:30,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3275 conditions, 1463 events. 716/1463 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7630 event pairs, 252 based on Foata normal form. 66/1512 useless extension candidates. Maximal degree in co-relation 3127. Up to 664 conditions per place. [2024-02-07 18:59:30,868 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-02-07 18:59:30,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 347 flow [2024-02-07 18:59:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 18:59:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 18:59:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-02-07 18:59:30,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 18:59:30,869 INFO L175 Difference]: Start difference. First operand has 55 places, 67 transitions, 331 flow. Second operand 3 states and 60 transitions. [2024-02-07 18:59:30,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 347 flow [2024-02-07 18:59:30,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-02-07 18:59:30,877 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 200 flow [2024-02-07 18:59:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-02-07 18:59:30,878 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2024-02-07 18:59:30,879 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 200 flow [2024-02-07 18:59:30,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 18:59:30,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:30,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:30,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 18:59:30,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:30,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:30,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1587857623, now seen corresponding path program 1 times [2024-02-07 18:59:30,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:30,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345968651] [2024-02-07 18:59:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:30,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:31,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:31,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:31,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345968651] [2024-02-07 18:59:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345968651] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 18:59:31,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 18:59:31,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 18:59:31,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136085910] [2024-02-07 18:59:31,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 18:59:31,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 18:59:31,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 18:59:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 18:59:31,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 18:59:31,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-02-07 18:59:31,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:31,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 18:59:31,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:31,603 INFO L124 PetriNetUnfolderBase]: 894/1823 cut-off events. [2024-02-07 18:59:31,603 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2024-02-07 18:59:31,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4123 conditions, 1823 events. 894/1823 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9825 event pairs, 294 based on Foata normal form. 0/1801 useless extension candidates. Maximal degree in co-relation 3739. Up to 1052 conditions per place. [2024-02-07 18:59:31,614 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 59 selfloop transitions, 7 changer transitions 8/86 dead transitions. [2024-02-07 18:59:31,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 454 flow [2024-02-07 18:59:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 18:59:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 18:59:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-02-07 18:59:31,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 18:59:31,616 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 200 flow. Second operand 5 states and 100 transitions. [2024-02-07 18:59:31,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 454 flow [2024-02-07 18:59:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 443 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 18:59:31,622 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 253 flow [2024-02-07 18:59:31,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-02-07 18:59:31,624 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 23 predicate places. [2024-02-07 18:59:31,624 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 253 flow [2024-02-07 18:59:31,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-02-07 18:59:31,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:31,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:31,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 18:59:31,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:31,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:31,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1967098828, now seen corresponding path program 1 times [2024-02-07 18:59:31,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:31,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014250080] [2024-02-07 18:59:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014250080] [2024-02-07 18:59:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014250080] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:32,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786977416] [2024-02-07 18:59:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:32,097 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) [2024-02-07 18:59:32,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 18:59:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:32,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 18:59:32,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:32,270 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 8 treesize of output 1 [2024-02-07 18:59:32,333 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 25 treesize of output 1 [2024-02-07 18:59:32,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2024-02-07 18:59:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:32,717 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 9 treesize of output 1 [2024-02-07 18:59:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:32,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786977416] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:32,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-02-07 18:59:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753002480] [2024-02-07 18:59:32,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 18:59:32,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:32,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 18:59:32,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-02-07 18:59:32,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:32,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 253 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 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) [2024-02-07 18:59:32,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:32,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:32,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:33,686 INFO L124 PetriNetUnfolderBase]: 1870/3715 cut-off events. [2024-02-07 18:59:33,686 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2024-02-07 18:59:33,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8383 conditions, 3715 events. 1870/3715 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 21735 event pairs, 251 based on Foata normal form. 0/3625 useless extension candidates. Maximal degree in co-relation 7250. Up to 551 conditions per place. [2024-02-07 18:59:33,706 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 193 selfloop transitions, 49 changer transitions 27/274 dead transitions. [2024-02-07 18:59:33,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 274 transitions, 1463 flow [2024-02-07 18:59:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 18:59:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 18:59:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-02-07 18:59:33,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5729323308270676 [2024-02-07 18:59:33,709 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 253 flow. Second operand 19 states and 381 transitions. [2024-02-07 18:59:33,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 274 transitions, 1463 flow [2024-02-07 18:59:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 274 transitions, 1455 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 18:59:33,716 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 515 flow [2024-02-07 18:59:33,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=515, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-02-07 18:59:33,717 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2024-02-07 18:59:33,717 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 515 flow [2024-02-07 18:59:33,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 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) [2024-02-07 18:59:33,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:33,718 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:33,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:33,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:33,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:33,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1055486467, now seen corresponding path program 1 times [2024-02-07 18:59:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:33,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898165658] [2024-02-07 18:59:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:33,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-07 18:59:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898165658] [2024-02-07 18:59:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898165658] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:34,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432612860] [2024-02-07 18:59:34,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:34,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:34,132 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) [2024-02-07 18:59:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 18:59:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:34,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 18:59:34,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:34,287 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 8 treesize of output 1 [2024-02-07 18:59:34,327 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 8 treesize of output 1 [2024-02-07 18:59:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:34,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-07 18:59:34,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432612860] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:34,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:34,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-02-07 18:59:34,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307402990] [2024-02-07 18:59:34,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:34,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 18:59:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:34,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 18:59:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-02-07 18:59:34,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:34,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 515 flow. Second operand has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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) [2024-02-07 18:59:34,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:34,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:34,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:35,516 INFO L124 PetriNetUnfolderBase]: 3074/6087 cut-off events. [2024-02-07 18:59:35,517 INFO L125 PetriNetUnfolderBase]: For 4613/4613 co-relation queries the response was YES. [2024-02-07 18:59:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14292 conditions, 6087 events. 3074/6087 cut-off events. For 4613/4613 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 38027 event pairs, 465 based on Foata normal form. 66/6087 useless extension candidates. Maximal degree in co-relation 13136. Up to 911 conditions per place. [2024-02-07 18:59:35,555 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 196 selfloop transitions, 90 changer transitions 12/303 dead transitions. [2024-02-07 18:59:35,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 303 transitions, 1862 flow [2024-02-07 18:59:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 18:59:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 18:59:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 365 transitions. [2024-02-07 18:59:35,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5488721804511278 [2024-02-07 18:59:35,558 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 515 flow. Second operand 19 states and 365 transitions. [2024-02-07 18:59:35,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 303 transitions, 1862 flow [2024-02-07 18:59:35,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 303 transitions, 1834 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-02-07 18:59:35,570 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1023 flow [2024-02-07 18:59:35,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1023, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2024-02-07 18:59:35,571 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 63 predicate places. [2024-02-07 18:59:35,571 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1023 flow [2024-02-07 18:59:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.785714285714286) internal successors, (165), 14 states have internal predecessors, (165), 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) [2024-02-07 18:59:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:35,572 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:35,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:35,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:35,786 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:35,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash -235686699, now seen corresponding path program 1 times [2024-02-07 18:59:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:35,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92203911] [2024-02-07 18:59:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 18:59:36,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:36,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92203911] [2024-02-07 18:59:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92203911] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:36,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115086987] [2024-02-07 18:59:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:36,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:36,413 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) [2024-02-07 18:59:36,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 18:59:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:36,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 18:59:36,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:36,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-07 18:59:36,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 82 treesize of output 66 [2024-02-07 18:59:36,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2024-02-07 18:59:36,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 88 treesize of output 43 [2024-02-07 18:59:37,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 18:59:37,067 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 113 treesize of output 57 [2024-02-07 18:59:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:37,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:37,592 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 18:59:37,593 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 1 case distinctions, treesize of input 18 treesize of output 14 [2024-02-07 18:59:37,625 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-02-07 18:59:37,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 78 treesize of output 65 [2024-02-07 18:59:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:37,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115086987] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:37,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:37,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-02-07 18:59:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478798735] [2024-02-07 18:59:37,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 18:59:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 18:59:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2024-02-07 18:59:37,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:37,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1023 flow. Second operand has 16 states, 16 states have (on average 11.25) internal successors, (180), 16 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) [2024-02-07 18:59:37,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:37,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:37,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:40,609 INFO L124 PetriNetUnfolderBase]: 4579/9020 cut-off events. [2024-02-07 18:59:40,610 INFO L125 PetriNetUnfolderBase]: For 10493/10493 co-relation queries the response was YES. [2024-02-07 18:59:40,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22351 conditions, 9020 events. 4579/9020 cut-off events. For 10493/10493 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 60414 event pairs, 869 based on Foata normal form. 64/9002 useless extension candidates. Maximal degree in co-relation 21118. Up to 1370 conditions per place. [2024-02-07 18:59:40,668 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 269 selfloop transitions, 129 changer transitions 75/478 dead transitions. [2024-02-07 18:59:40,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 478 transitions, 3237 flow [2024-02-07 18:59:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 18:59:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 18:59:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 599 transitions. [2024-02-07 18:59:40,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348214285714286 [2024-02-07 18:59:40,671 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1023 flow. Second operand 32 states and 599 transitions. [2024-02-07 18:59:40,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 478 transitions, 3237 flow [2024-02-07 18:59:40,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 478 transitions, 3173 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-02-07 18:59:40,704 INFO L231 Difference]: Finished difference. Result has 130 places, 178 transitions, 1710 flow [2024-02-07 18:59:40,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1710, PETRI_PLACES=130, PETRI_TRANSITIONS=178} [2024-02-07 18:59:40,705 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 97 predicate places. [2024-02-07 18:59:40,706 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 178 transitions, 1710 flow [2024-02-07 18:59:40,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.25) internal successors, (180), 16 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) [2024-02-07 18:59:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:40,707 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-02-07 18:59:40,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:40,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:40,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:40,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash 449342831, now seen corresponding path program 2 times [2024-02-07 18:59:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630865847] [2024-02-07 18:59:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:40,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:41,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:41,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630865847] [2024-02-07 18:59:41,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630865847] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:41,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815664435] [2024-02-07 18:59:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:41,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:41,236 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) [2024-02-07 18:59:41,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 18:59:41,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 18:59:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:41,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 18:59:41,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:41,386 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 8 treesize of output 1 [2024-02-07 18:59:41,466 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 8 treesize of output 1 [2024-02-07 18:59:41,496 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 8 treesize of output 1 [2024-02-07 18:59:41,529 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 8 treesize of output 1 [2024-02-07 18:59:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:41,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:41,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815664435] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:41,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:41,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-02-07 18:59:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483550374] [2024-02-07 18:59:41,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 18:59:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 18:59:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2024-02-07 18:59:41,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:41,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 178 transitions, 1710 flow. Second operand has 23 states, 23 states have (on average 10.391304347826088) internal successors, (239), 23 states have internal predecessors, (239), 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) [2024-02-07 18:59:41,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:41,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:41,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 18:59:45,346 INFO L124 PetriNetUnfolderBase]: 11724/22981 cut-off events. [2024-02-07 18:59:45,347 INFO L125 PetriNetUnfolderBase]: For 44084/44084 co-relation queries the response was YES. [2024-02-07 18:59:45,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61762 conditions, 22981 events. 11724/22981 cut-off events. For 44084/44084 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 172903 event pairs, 2323 based on Foata normal form. 232/23059 useless extension candidates. Maximal degree in co-relation 59720. Up to 3483 conditions per place. [2024-02-07 18:59:45,575 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 586 selfloop transitions, 381 changer transitions 30/1002 dead transitions. [2024-02-07 18:59:45,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1002 transitions, 8145 flow [2024-02-07 18:59:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-02-07 18:59:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-02-07 18:59:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1110 transitions. [2024-02-07 18:59:45,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-02-07 18:59:45,581 INFO L175 Difference]: Start difference. First operand has 130 places, 178 transitions, 1710 flow. Second operand 60 states and 1110 transitions. [2024-02-07 18:59:45,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1002 transitions, 8145 flow [2024-02-07 18:59:45,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1002 transitions, 7976 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-02-07 18:59:45,719 INFO L231 Difference]: Finished difference. Result has 199 places, 452 transitions, 5147 flow [2024-02-07 18:59:45,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5147, PETRI_PLACES=199, PETRI_TRANSITIONS=452} [2024-02-07 18:59:45,722 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 166 predicate places. [2024-02-07 18:59:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 452 transitions, 5147 flow [2024-02-07 18:59:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.391304347826088) internal successors, (239), 23 states have internal predecessors, (239), 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) [2024-02-07 18:59:45,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 18:59:45,723 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 18:59:45,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 18:59:45,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:45,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 18:59:45,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 18:59:45,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1522174711, now seen corresponding path program 2 times [2024-02-07 18:59:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 18:59:45,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005578077] [2024-02-07 18:59:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 18:59:45,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 18:59:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 18:59:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 18:59:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005578077] [2024-02-07 18:59:48,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005578077] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 18:59:48,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618565915] [2024-02-07 18:59:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 18:59:48,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 18:59:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 18:59:48,605 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) [2024-02-07 18:59:48,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 18:59:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 18:59:48,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 18:59:48,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-07 18:59:48,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 18:59:48,778 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 [2024-02-07 18:59:48,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 66 treesize of output 50 [2024-02-07 18:59:48,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2024-02-07 18:59:48,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 33 treesize of output 15 [2024-02-07 18:59:49,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 123 treesize of output 95 [2024-02-07 18:59:49,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 18:59:49,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 111 [2024-02-07 18:59:49,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 44 treesize of output 22 [2024-02-07 18:59:50,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 18:59:50,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 227 treesize of output 107 [2024-02-07 18:59:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:50,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 18:59:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 18:59:51,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618565915] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 18:59:51,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 18:59:51,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-02-07 18:59:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607444544] [2024-02-07 18:59:51,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 18:59:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-07 18:59:51,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 18:59:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-07 18:59:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2024-02-07 18:59:51,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 18:59:51,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 452 transitions, 5147 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-02-07 18:59:51,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 18:59:51,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 18:59:51,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:00:07,042 INFO L124 PetriNetUnfolderBase]: 24303/47176 cut-off events. [2024-02-07 19:00:07,043 INFO L125 PetriNetUnfolderBase]: For 159879/159879 co-relation queries the response was YES. [2024-02-07 19:00:07,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139128 conditions, 47176 events. 24303/47176 cut-off events. For 159879/159879 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 379545 event pairs, 3791 based on Foata normal form. 528/47214 useless extension candidates. Maximal degree in co-relation 136890. Up to 7579 conditions per place. [2024-02-07 19:00:07,683 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 580 selfloop transitions, 752 changer transitions 87/1424 dead transitions. [2024-02-07 19:00:07,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1424 transitions, 15637 flow [2024-02-07 19:00:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-02-07 19:00:07,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-02-07 19:00:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 912 transitions. [2024-02-07 19:00:07,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010989010989011 [2024-02-07 19:00:07,686 INFO L175 Difference]: Start difference. First operand has 199 places, 452 transitions, 5147 flow. Second operand 52 states and 912 transitions. [2024-02-07 19:00:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1424 transitions, 15637 flow [2024-02-07 19:00:08,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1424 transitions, 14656 flow, removed 463 selfloop flow, removed 1 redundant places. [2024-02-07 19:00:08,940 INFO L231 Difference]: Finished difference. Result has 270 places, 909 transitions, 12067 flow [2024-02-07 19:00:08,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=12067, PETRI_PLACES=270, PETRI_TRANSITIONS=909} [2024-02-07 19:00:08,941 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 237 predicate places. [2024-02-07 19:00:08,941 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 909 transitions, 12067 flow [2024-02-07 19:00:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 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) [2024-02-07 19:00:08,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:00:08,942 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:00:08,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:00:09,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:00:09,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 19:00:09,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:00:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash -31352249, now seen corresponding path program 1 times [2024-02-07 19:00:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:00:09,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954112538] [2024-02-07 19:00:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:00:09,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:00:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:00:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-07 19:00:09,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:00:09,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954112538] [2024-02-07 19:00:09,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954112538] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:00:09,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074805014] [2024-02-07 19:00:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:00:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:00:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:00:09,487 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) [2024-02-07 19:00:09,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:00:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:00:09,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:00:09,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:00:09,679 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 8 treesize of output 1 [2024-02-07 19:00:09,776 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 8 treesize of output 1 [2024-02-07 19:00:09,810 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 8 treesize of output 1 [2024-02-07 19:00:09,845 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 8 treesize of output 1 [2024-02-07 19:00:09,883 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 8 treesize of output 1 [2024-02-07 19:00:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:10,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:00:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-02-07 19:00:10,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074805014] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:00:10,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:00:10,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-02-07 19:00:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730844500] [2024-02-07 19:00:10,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:00:10,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 19:00:10,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:00:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 19:00:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-02-07 19:00:10,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 19:00:10,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 909 transitions, 12067 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:00:10,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:00:10,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 19:00:10,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:00:30,198 INFO L124 PetriNetUnfolderBase]: 40555/79053 cut-off events. [2024-02-07 19:00:30,199 INFO L125 PetriNetUnfolderBase]: For 537849/537849 co-relation queries the response was YES. [2024-02-07 19:00:31,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253722 conditions, 79053 events. 40555/79053 cut-off events. For 537849/537849 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 672921 event pairs, 5196 based on Foata normal form. 528/79563 useless extension candidates. Maximal degree in co-relation 251523. Up to 12150 conditions per place. [2024-02-07 19:00:31,922 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 739 selfloop transitions, 1428 changer transitions 45/2217 dead transitions. [2024-02-07 19:00:31,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 2217 transitions, 27909 flow [2024-02-07 19:00:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-02-07 19:00:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-02-07 19:00:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1184 transitions. [2024-02-07 19:00:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204395604395604 [2024-02-07 19:00:31,929 INFO L175 Difference]: Start difference. First operand has 270 places, 909 transitions, 12067 flow. Second operand 65 states and 1184 transitions. [2024-02-07 19:00:31,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 2217 transitions, 27909 flow [2024-02-07 19:00:38,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 2217 transitions, 27538 flow, removed 171 selfloop flow, removed 10 redundant places. [2024-02-07 19:00:38,476 INFO L231 Difference]: Finished difference. Result has 336 places, 1581 transitions, 23841 flow [2024-02-07 19:00:38,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11832, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=23841, PETRI_PLACES=336, PETRI_TRANSITIONS=1581} [2024-02-07 19:00:38,477 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 303 predicate places. [2024-02-07 19:00:38,477 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1581 transitions, 23841 flow [2024-02-07 19:00:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:00:38,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:00:38,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:00:38,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:00:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:00:38,694 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-02-07 19:00:38,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:00:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -408974119, now seen corresponding path program 3 times [2024-02-07 19:00:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:00:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885738763] [2024-02-07 19:00:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:00:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:00:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:00:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:44,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:00:44,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885738763] [2024-02-07 19:00:44,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885738763] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:00:44,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669880103] [2024-02-07 19:00:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:00:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:00:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:00:44,629 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) [2024-02-07 19:00:44,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:00:44,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 19:00:44,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:00:44,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 29 conjunts are in the unsatisfiable core [2024-02-07 19:00:44,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:00:44,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-02-07 19:00:44,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 80 treesize of output 64 [2024-02-07 19:00:44,978 INFO L349 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2024-02-07 19:00:44,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 80 [2024-02-07 19:00:45,023 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 0 case distinctions, treesize of input 58 treesize of output 20 [2024-02-07 19:00:45,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 159 treesize of output 131 [2024-02-07 19:00:45,274 INFO L349 Elim1Store]: treesize reduction 124, result has 14.5 percent of original size [2024-02-07 19:00:45,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 115 [2024-02-07 19:00:45,310 INFO L349 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2024-02-07 19:00:45,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 79 [2024-02-07 19:00:45,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 118 [2024-02-07 19:00:47,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-02-07 19:00:47,792 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 245 treesize of output 113 [2024-02-07 19:00:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:47,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:00:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:00:48,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669880103] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:00:48,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:00:48,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2024-02-07 19:00:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45481879] [2024-02-07 19:00:48,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:00:48,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-02-07 19:00:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:00:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-02-07 19:00:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2024-02-07 19:00:49,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 19:00:49,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1581 transitions, 23841 flow. Second operand has 33 states, 33 states have (on average 10.909090909090908) internal successors, (360), 33 states have internal predecessors, (360), 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) [2024-02-07 19:00:49,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:00:49,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 19:00:49,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:01:08,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []