./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/array-eq-symm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/array-eq-symm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 01:06:19,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 01:06:19,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 01:06:19,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 01:06:19,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 01:06:19,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 01:06:19,784 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 01:06:19,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 01:06:19,785 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 01:06:19,807 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 01:06:19,807 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 01:06:19,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 01:06:19,808 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 01:06:19,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 01:06:19,810 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 01:06:19,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 01:06:19,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 01:06:19,811 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 01:06:19,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 01:06:19,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 01:06:19,812 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 01:06:19,812 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 01:06:19,812 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 01:06:19,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 01:06:19,813 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 01:06:19,813 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 01:06:19,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 01:06:19,814 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 01:06:19,814 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 01:06:19,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 01:06:19,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 01:06:19,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 01:06:19,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:19,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 01:06:19,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 01:06:19,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 01:06:19,817 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 01:06:19,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 01:06:19,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 01:06:19,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 01:06:19,818 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 01:06:19,818 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 01:06:19,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 01:06:19,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 01:06:20,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 01:06:20,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 01:06:20,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 01:06:20,090 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 01:06:20,091 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 01:06:20,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/array-eq-symm.wvr.yml/witness.yml [2024-06-28 01:06:20,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 01:06:20,183 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 01:06:20,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-28 01:06:21,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 01:06:21,595 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 01:06:21,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c [2024-06-28 01:06:21,601 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfb08664/d805ba72d50042ff90d7fd8a6c21735a/FLAGa6a48324f [2024-06-28 01:06:21,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfb08664/d805ba72d50042ff90d7fd8a6c21735a [2024-06-28 01:06:21,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 01:06:21,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 01:06:21,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:21,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 01:06:21,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 01:06:21,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:20" (1/2) ... [2024-06-28 01:06:21,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f41fe3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:21, skipping insertion in model container [2024-06-28 01:06:21,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:20" (1/2) ... [2024-06-28 01:06:21,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@543adde8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 01:06:21, skipping insertion in model container [2024-06-28 01:06:21,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:21" (2/2) ... [2024-06-28 01:06:21,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f41fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21, skipping insertion in model container [2024-06-28 01:06:21,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 01:06:21" (2/2) ... [2024-06-28 01:06:21,624 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 01:06:21,637 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 01:06:21,638 INFO L97 edCorrectnessWitness]: Location invariant before [L81-L81] (! multithreaded || 0 <= i_BA) && (! multithreaded || 0 <= i_AB) [2024-06-28 01:06:21,638 INFO L97 edCorrectnessWitness]: Location invariant before [L80-L80] (! multithreaded || 0 <= i_BA) && (! multithreaded || 0 <= i_AB) [2024-06-28 01:06:21,639 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 01:06:21,639 INFO L106 edCorrectnessWitness]: ghost_update [L79-L79] multithreaded = 1; [2024-06-28 01:06:21,658 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 01:06:21,842 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2024-06-28 01:06:21,851 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:21,859 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 01:06:21,903 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-symm.wvr.c[2277,2290] [2024-06-28 01:06:21,908 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 01:06:21,924 INFO L206 MainTranslator]: Completed translation [2024-06-28 01:06:21,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21 WrapperNode [2024-06-28 01:06:21,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 01:06:21,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:21,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 01:06:21,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 01:06:21,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:21,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:21,984 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 110 [2024-06-28 01:06:21,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 01:06:21,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 01:06:21,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 01:06:21,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 01:06:21,997 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:21,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,013 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,026 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-06-28 01:06:22,039 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,040 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,060 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 01:06:22,071 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 01:06:22,071 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 01:06:22,072 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 01:06:22,074 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (1/1) ... [2024-06-28 01:06:22,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 01:06:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:22,193 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) [2024-06-28 01:06:22,215 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 [2024-06-28 01:06:22,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 01:06:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-28 01:06:22,233 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-28 01:06:22,233 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-28 01:06:22,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-28 01:06:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 01:06:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 01:06:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 01:06:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 01:06:22,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-28 01:06:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 01:06:22,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 01:06:22,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 01:06:22,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 01:06:22,237 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 01:06:22,333 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 01:06:22,335 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 01:06:22,581 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 01:06:22,582 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 01:06:22,866 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 01:06:22,867 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-06-28 01:06:22,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:22 BoogieIcfgContainer [2024-06-28 01:06:22,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 01:06:22,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 01:06:22,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 01:06:22,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 01:06:22,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 01:06:20" (1/4) ... [2024-06-28 01:06:22,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c80e963 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 01:06:22, skipping insertion in model container [2024-06-28 01:06:22,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 01:06:21" (2/4) ... [2024-06-28 01:06:22,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c80e963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:06:22, skipping insertion in model container [2024-06-28 01:06:22,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 01:06:21" (3/4) ... [2024-06-28 01:06:22,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c80e963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 01:06:22, skipping insertion in model container [2024-06-28 01:06:22,879 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 01:06:22" (4/4) ... [2024-06-28 01:06:22,885 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-06-28 01:06:22,903 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 01:06:22,903 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 01:06:22,903 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 01:06:22,953 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-28 01:06:22,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 80 flow [2024-06-28 01:06:23,043 INFO L124 PetriNetUnfolderBase]: 6/31 cut-off events. [2024-06-28 01:06:23,043 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-28 01:06:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 6/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-06-28 01:06:23,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 33 transitions, 80 flow [2024-06-28 01:06:23,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 30 transitions, 72 flow [2024-06-28 01:06:23,068 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 01:06:23,078 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;@62143e7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 01:06:23,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-28 01:06:23,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 01:06:23,087 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2024-06-28 01:06:23,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 01:06:23,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:23,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:23,089 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:23,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -703603354, now seen corresponding path program 1 times [2024-06-28 01:06:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:23,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858999882] [2024-06-28 01:06:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:23,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858999882] [2024-06-28 01:06:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858999882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:23,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 01:06:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975898682] [2024-06-28 01:06:23,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:23,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:23,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:23,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-06-28 01:06:23,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:23,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:23,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:23,684 INFO L124 PetriNetUnfolderBase]: 264/425 cut-off events. [2024-06-28 01:06:23,684 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-28 01:06:23,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 425 events. 264/425 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1580 event pairs, 70 based on Foata normal form. 20/311 useless extension candidates. Maximal degree in co-relation 775. Up to 262 conditions per place. [2024-06-28 01:06:23,693 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 40 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-06-28 01:06:23,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 199 flow [2024-06-28 01:06:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-06-28 01:06:23,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565656565656566 [2024-06-28 01:06:23,708 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 65 transitions. [2024-06-28 01:06:23,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 199 flow [2024-06-28 01:06:23,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:23,717 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 78 flow [2024-06-28 01:06:23,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2024-06-28 01:06:23,722 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-28 01:06:23,723 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 78 flow [2024-06-28 01:06:23,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2024-06-28 01:06:23,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:23,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:23,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 01:06:23,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:23,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:23,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1595094412, now seen corresponding path program 1 times [2024-06-28 01:06:23,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:23,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397321855] [2024-06-28 01:06:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:23,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397321855] [2024-06-28 01:06:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397321855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:23,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:23,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:06:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725188678] [2024-06-28 01:06:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:23,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:23,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:23,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-06-28 01:06:23,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:23,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:23,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:24,053 INFO L124 PetriNetUnfolderBase]: 206/343 cut-off events. [2024-06-28 01:06:24,053 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-28 01:06:24,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 343 events. 206/343 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1272 event pairs, 52 based on Foata normal form. 24/286 useless extension candidates. Maximal degree in co-relation 310. Up to 179 conditions per place. [2024-06-28 01:06:24,060 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 38 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-06-28 01:06:24,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 185 flow [2024-06-28 01:06:24,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 01:06:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 01:06:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-06-28 01:06:24,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-28 01:06:24,064 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-06-28 01:06:24,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 185 flow [2024-06-28 01:06:24,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:24,068 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 72 flow [2024-06-28 01:06:24,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-06-28 01:06:24,070 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-06-28 01:06:24,070 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 72 flow [2024-06-28 01:06:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-06-28 01:06:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:24,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 01:06:24,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:24,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:24,092 INFO L85 PathProgramCache]: Analyzing trace with hash -733798241, now seen corresponding path program 1 times [2024-06-28 01:06:24,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:24,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719444572] [2024-06-28 01:06:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:24,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:24,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719444572] [2024-06-28 01:06:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719444572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:24,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 01:06:24,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736551259] [2024-06-28 01:06:24,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:24,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 01:06:24,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:24,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 01:06:24,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 01:06:24,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:24,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-28 01:06:24,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:24,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:24,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:24,410 INFO L124 PetriNetUnfolderBase]: 264/433 cut-off events. [2024-06-28 01:06:24,410 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-06-28 01:06:24,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 433 events. 264/433 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1664 event pairs, 52 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 476. Up to 295 conditions per place. [2024-06-28 01:06:24,413 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 36 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2024-06-28 01:06:24,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 191 flow [2024-06-28 01:06:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 01:06:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 01:06:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-28 01:06:24,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6161616161616161 [2024-06-28 01:06:24,418 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 72 flow. Second operand 3 states and 61 transitions. [2024-06-28 01:06:24,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 191 flow [2024-06-28 01:06:24,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:24,421 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 91 flow [2024-06-28 01:06:24,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=3, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-06-28 01:06:24,423 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2024-06-28 01:06:24,424 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 91 flow [2024-06-28 01:06:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-06-28 01:06:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:24,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:24,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 01:06:24,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:24,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:24,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1599461055, now seen corresponding path program 1 times [2024-06-28 01:06:24,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:24,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106217788] [2024-06-28 01:06:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:24,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106217788] [2024-06-28 01:06:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106217788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:06:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225997274] [2024-06-28 01:06:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:24,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:24,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-28 01:06:24,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:24,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:24,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:24,705 INFO L124 PetriNetUnfolderBase]: 337/604 cut-off events. [2024-06-28 01:06:24,706 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2024-06-28 01:06:24,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 604 events. 337/604 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2755 event pairs, 212 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 859. Up to 397 conditions per place. [2024-06-28 01:06:24,710 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 42 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-06-28 01:06:24,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 234 flow [2024-06-28 01:06:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-28 01:06:24,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 01:06:24,714 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 91 flow. Second operand 5 states and 88 transitions. [2024-06-28 01:06:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 234 flow [2024-06-28 01:06:24,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:24,717 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 116 flow [2024-06-28 01:06:24,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-06-28 01:06:24,719 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-06-28 01:06:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 116 flow [2024-06-28 01:06:24,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-28 01:06:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:24,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 01:06:24,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:24,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:24,721 INFO L85 PathProgramCache]: Analyzing trace with hash -673997473, now seen corresponding path program 1 times [2024-06-28 01:06:24,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:24,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257808963] [2024-06-28 01:06:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:24,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257808963] [2024-06-28 01:06:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257808963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:24,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 01:06:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851953602] [2024-06-28 01:06:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 01:06:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 01:06:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 01:06:24,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:24,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-28 01:06:24,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:24,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:24,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:24,958 INFO L124 PetriNetUnfolderBase]: 276/502 cut-off events. [2024-06-28 01:06:24,958 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-06-28 01:06:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 502 events. 276/502 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2162 event pairs, 172 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 967. Up to 397 conditions per place. [2024-06-28 01:06:24,961 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 2 changer transitions 14/46 dead transitions. [2024-06-28 01:06:24,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 46 transitions, 226 flow [2024-06-28 01:06:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:24,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:24,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-28 01:06:24,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-28 01:06:24,967 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 116 flow. Second operand 5 states and 84 transitions. [2024-06-28 01:06:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 46 transitions, 226 flow [2024-06-28 01:06:24,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 222 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:24,970 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 106 flow [2024-06-28 01:06:24,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2024-06-28 01:06:24,971 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-28 01:06:24,971 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 106 flow [2024-06-28 01:06:24,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 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) [2024-06-28 01:06:24,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:24,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:24,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 01:06:24,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:24,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:24,973 INFO L85 PathProgramCache]: Analyzing trace with hash 71841754, now seen corresponding path program 1 times [2024-06-28 01:06:24,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:24,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863595598] [2024-06-28 01:06:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:24,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:25,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863595598] [2024-06-28 01:06:25,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863595598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:25,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:25,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:25,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476298217] [2024-06-28 01:06:25,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:25,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:25,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:06:25,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:25,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-06-28 01:06:25,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:25,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:25,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:25,199 INFO L124 PetriNetUnfolderBase]: 349/604 cut-off events. [2024-06-28 01:06:25,199 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-28 01:06:25,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 604 events. 349/604 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2691 event pairs, 160 based on Foata normal form. 19/616 useless extension candidates. Maximal degree in co-relation 1382. Up to 228 conditions per place. [2024-06-28 01:06:25,203 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 55 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2024-06-28 01:06:25,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 66 transitions, 321 flow [2024-06-28 01:06:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-28 01:06:25,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242424242424243 [2024-06-28 01:06:25,206 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 106 flow. Second operand 5 states and 103 transitions. [2024-06-28 01:06:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 66 transitions, 321 flow [2024-06-28 01:06:25,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 303 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:25,209 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 122 flow [2024-06-28 01:06:25,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-28 01:06:25,212 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-28 01:06:25,212 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 122 flow [2024-06-28 01:06:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-06-28 01:06:25,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:25,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:25,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 01:06:25,213 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:25,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 426416632, now seen corresponding path program 1 times [2024-06-28 01:06:25,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:25,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168379308] [2024-06-28 01:06:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:25,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:25,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:25,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168379308] [2024-06-28 01:06:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168379308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:25,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 01:06:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303777770] [2024-06-28 01:06:25,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 01:06:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 01:06:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 01:06:25,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-06-28 01:06:25,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:25,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:25,426 INFO L124 PetriNetUnfolderBase]: 275/501 cut-off events. [2024-06-28 01:06:25,426 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-06-28 01:06:25,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 501 events. 275/501 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2200 event pairs, 172 based on Foata normal form. 0/465 useless extension candidates. Maximal degree in co-relation 1114. Up to 397 conditions per place. [2024-06-28 01:06:25,430 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 25 selfloop transitions, 3 changer transitions 12/45 dead transitions. [2024-06-28 01:06:25,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 45 transitions, 228 flow [2024-06-28 01:06:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 01:06:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 01:06:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-28 01:06:25,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49696969696969695 [2024-06-28 01:06:25,440 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 122 flow. Second operand 5 states and 82 transitions. [2024-06-28 01:06:25,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 45 transitions, 228 flow [2024-06-28 01:06:25,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 220 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:25,444 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 116 flow [2024-06-28 01:06:25,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-06-28 01:06:25,446 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-28 01:06:25,446 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 116 flow [2024-06-28 01:06:25,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-06-28 01:06:25,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:25,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:25,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 01:06:25,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:25,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:25,448 INFO L85 PathProgramCache]: Analyzing trace with hash 534446221, now seen corresponding path program 1 times [2024-06-28 01:06:25,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:25,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897812122] [2024-06-28 01:06:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:25,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897812122] [2024-06-28 01:06:25,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897812122] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:25,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310539055] [2024-06-28 01:06:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:25,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:25,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:25,606 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) [2024-06-28 01:06:25,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-28 01:06:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:25,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-28 01:06:25,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:25,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310539055] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:25,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 01:06:25,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-06-28 01:06:25,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886441412] [2024-06-28 01:06:25,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:06:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:06:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-06-28 01:06:25,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:25,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-06-28 01:06:25,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:25,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:25,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:26,134 INFO L124 PetriNetUnfolderBase]: 333/584 cut-off events. [2024-06-28 01:06:26,135 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2024-06-28 01:06:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 584 events. 333/584 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2412 event pairs, 100 based on Foata normal form. 10/585 useless extension candidates. Maximal degree in co-relation 1357. Up to 235 conditions per place. [2024-06-28 01:06:26,138 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-28 01:06:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 293 flow [2024-06-28 01:06:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 01:06:26,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-28 01:06:26,140 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 116 flow. Second operand 7 states and 112 transitions. [2024-06-28 01:06:26,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 293 flow [2024-06-28 01:06:26,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 277 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:26,142 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 140 flow [2024-06-28 01:06:26,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 01:06:26,142 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-28 01:06:26,143 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 140 flow [2024-06-28 01:06:26,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-06-28 01:06:26,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:26,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:26,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-28 01:06:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:26,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:26,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 889021099, now seen corresponding path program 1 times [2024-06-28 01:06:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:26,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618999313] [2024-06-28 01:06:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618999313] [2024-06-28 01:06:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618999313] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:26,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162736537] [2024-06-28 01:06:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:26,540 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) [2024-06-28 01:06:26,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-28 01:06:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:26,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-28 01:06:26,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:26,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:26,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162736537] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:26,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 01:06:26,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-06-28 01:06:26,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9724450] [2024-06-28 01:06:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:06:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:06:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-06-28 01:06:26,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:26,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-06-28 01:06:26,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:26,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:26,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:26,962 INFO L124 PetriNetUnfolderBase]: 363/666 cut-off events. [2024-06-28 01:06:26,962 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2024-06-28 01:06:26,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 666 events. 363/666 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3087 event pairs, 141 based on Foata normal form. 0/638 useless extension candidates. Maximal degree in co-relation 1625. Up to 230 conditions per place. [2024-06-28 01:06:26,967 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-28 01:06:26,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 364 flow [2024-06-28 01:06:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 01:06:26,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-28 01:06:26,968 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 140 flow. Second operand 7 states and 118 transitions. [2024-06-28 01:06:26,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 364 flow [2024-06-28 01:06:26,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:26,971 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 166 flow [2024-06-28 01:06:26,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=166, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2024-06-28 01:06:26,972 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-28 01:06:26,972 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 166 flow [2024-06-28 01:06:26,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-06-28 01:06:26,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:26,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:26,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-28 01:06:27,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-06-28 01:06:27,188 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:27,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1066354698, now seen corresponding path program 1 times [2024-06-28 01:06:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233907072] [2024-06-28 01:06:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:27,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:27,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233907072] [2024-06-28 01:06:27,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233907072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:27,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215835448] [2024-06-28 01:06:27,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:27,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:27,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:27,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:27,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:27,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:27,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:27,910 INFO L124 PetriNetUnfolderBase]: 374/680 cut-off events. [2024-06-28 01:06:27,911 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2024-06-28 01:06:27,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 680 events. 374/680 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3026 event pairs, 109 based on Foata normal form. 4/680 useless extension candidates. Maximal degree in co-relation 1834. Up to 549 conditions per place. [2024-06-28 01:06:27,916 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 11 changer transitions 5/64 dead transitions. [2024-06-28 01:06:27,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 371 flow [2024-06-28 01:06:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-28 01:06:27,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-28 01:06:27,918 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 166 flow. Second operand 7 states and 103 transitions. [2024-06-28 01:06:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 371 flow [2024-06-28 01:06:27,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 353 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:27,921 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 231 flow [2024-06-28 01:06:27,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2024-06-28 01:06:27,922 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 21 predicate places. [2024-06-28 01:06:27,922 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 231 flow [2024-06-28 01:06:27,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:27,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:27,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:27,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 01:06:27,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:27,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 489233884, now seen corresponding path program 2 times [2024-06-28 01:06:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:27,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049558941] [2024-06-28 01:06:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:28,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049558941] [2024-06-28 01:06:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049558941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:28,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:28,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300999461] [2024-06-28 01:06:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:28,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:28,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 231 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:28,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:28,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:28,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:28,548 INFO L124 PetriNetUnfolderBase]: 372/677 cut-off events. [2024-06-28 01:06:28,548 INFO L125 PetriNetUnfolderBase]: For 597/600 co-relation queries the response was YES. [2024-06-28 01:06:28,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2033 conditions, 677 events. 372/677 cut-off events. For 597/600 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2889 event pairs, 125 based on Foata normal form. 6/679 useless extension candidates. Maximal degree in co-relation 2003. Up to 549 conditions per place. [2024-06-28 01:06:28,553 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 12 changer transitions 8/68 dead transitions. [2024-06-28 01:06:28,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 462 flow [2024-06-28 01:06:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-28 01:06:28,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-28 01:06:28,555 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 231 flow. Second operand 7 states and 102 transitions. [2024-06-28 01:06:28,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 462 flow [2024-06-28 01:06:28,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 68 transitions, 444 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 01:06:28,560 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 297 flow [2024-06-28 01:06:28,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-06-28 01:06:28,561 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-28 01:06:28,561 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 297 flow [2024-06-28 01:06:28,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:28,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:28,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:28,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 01:06:28,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:28,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1130160326, now seen corresponding path program 3 times [2024-06-28 01:06:28,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:28,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091472167] [2024-06-28 01:06:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:28,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:28,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091472167] [2024-06-28 01:06:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091472167] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:28,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369049687] [2024-06-28 01:06:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:06:28,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:28,916 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) [2024-06-28 01:06:28,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-28 01:06:29,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:06:29,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:29,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-28 01:06:29,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:29,208 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-28 01:06:29,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-28 01:06:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:29,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:29,313 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:06:29,313 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 40 treesize of output 56 [2024-06-28 01:06:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369049687] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:29,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:29,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2024-06-28 01:06:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35880804] [2024-06-28 01:06:29,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:29,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:06:29,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:29,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:06:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:06:29,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 297 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 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) [2024-06-28 01:06:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:29,656 INFO L124 PetriNetUnfolderBase]: 384/700 cut-off events. [2024-06-28 01:06:29,657 INFO L125 PetriNetUnfolderBase]: For 803/803 co-relation queries the response was YES. [2024-06-28 01:06:29,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 700 events. 384/700 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3074 event pairs, 52 based on Foata normal form. 14/711 useless extension candidates. Maximal degree in co-relation 2225. Up to 388 conditions per place. [2024-06-28 01:06:29,663 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 56 selfloop transitions, 16 changer transitions 3/80 dead transitions. [2024-06-28 01:06:29,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 558 flow [2024-06-28 01:06:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:06:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:06:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 01:06:29,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-28 01:06:29,665 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 297 flow. Second operand 8 states and 124 transitions. [2024-06-28 01:06:29,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 558 flow [2024-06-28 01:06:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 540 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 01:06:29,671 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 325 flow [2024-06-28 01:06:29,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2024-06-28 01:06:29,673 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-28 01:06:29,673 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 325 flow [2024-06-28 01:06:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 states have internal predecessors, (125), 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) [2024-06-28 01:06:29,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:29,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:29,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:29,894 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:29,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1307737570, now seen corresponding path program 1 times [2024-06-28 01:06:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481547441] [2024-06-28 01:06:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:29,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:30,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481547441] [2024-06-28 01:06:30,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481547441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:30,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:30,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872705372] [2024-06-28 01:06:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:30,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:30,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:30,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:30,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:30,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:30,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:30,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:30,504 INFO L124 PetriNetUnfolderBase]: 389/705 cut-off events. [2024-06-28 01:06:30,505 INFO L125 PetriNetUnfolderBase]: For 1061/1061 co-relation queries the response was YES. [2024-06-28 01:06:30,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 705 events. 389/705 cut-off events. For 1061/1061 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3128 event pairs, 99 based on Foata normal form. 5/709 useless extension candidates. Maximal degree in co-relation 2314. Up to 583 conditions per place. [2024-06-28 01:06:30,510 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 43 selfloop transitions, 13 changer transitions 13/74 dead transitions. [2024-06-28 01:06:30,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 557 flow [2024-06-28 01:06:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 01:06:30,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-28 01:06:30,512 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 325 flow. Second operand 7 states and 107 transitions. [2024-06-28 01:06:30,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 557 flow [2024-06-28 01:06:30,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 502 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:06:30,518 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 318 flow [2024-06-28 01:06:30,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2024-06-28 01:06:30,519 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-28 01:06:30,519 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 318 flow [2024-06-28 01:06:30,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:30,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:30,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 01:06:30,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:30,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1440635664, now seen corresponding path program 2 times [2024-06-28 01:06:30,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:30,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508080042] [2024-06-28 01:06:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:30,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508080042] [2024-06-28 01:06:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508080042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:30,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:30,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:30,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745782533] [2024-06-28 01:06:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:30,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:30,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:30,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:30,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:30,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:30,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:31,080 INFO L124 PetriNetUnfolderBase]: 384/708 cut-off events. [2024-06-28 01:06:31,080 INFO L125 PetriNetUnfolderBase]: For 909/915 co-relation queries the response was YES. [2024-06-28 01:06:31,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 708 events. 384/708 cut-off events. For 909/915 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3112 event pairs, 156 based on Foata normal form. 9/715 useless extension candidates. Maximal degree in co-relation 2214. Up to 583 conditions per place. [2024-06-28 01:06:31,085 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 39 selfloop transitions, 14 changer transitions 10/68 dead transitions. [2024-06-28 01:06:31,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 518 flow [2024-06-28 01:06:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-28 01:06:31,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-28 01:06:31,088 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 318 flow. Second operand 7 states and 102 transitions. [2024-06-28 01:06:31,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 518 flow [2024-06-28 01:06:31,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 482 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:31,092 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 328 flow [2024-06-28 01:06:31,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2024-06-28 01:06:31,093 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-28 01:06:31,093 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 328 flow [2024-06-28 01:06:31,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:31,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:31,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:31,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 01:06:31,094 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:31,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:31,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2000607924, now seen corresponding path program 4 times [2024-06-28 01:06:31,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:31,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475542853] [2024-06-28 01:06:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:31,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:31,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475542853] [2024-06-28 01:06:31,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475542853] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:31,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569281210] [2024-06-28 01:06:31,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:06:31,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:31,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:31,425 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) [2024-06-28 01:06:31,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-28 01:06:31,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:06:31,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:31,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-28 01:06:31,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:31,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:31,648 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 29 treesize of output 21 [2024-06-28 01:06:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:31,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:31,780 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:06:31,780 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 40 treesize of output 56 [2024-06-28 01:06:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:31,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569281210] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:31,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:31,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-06-28 01:06:31,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026270150] [2024-06-28 01:06:31,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:31,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 01:06:31,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:31,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 01:06:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-28 01:06:31,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 328 flow. Second operand has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 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) [2024-06-28 01:06:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:31,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:32,193 INFO L124 PetriNetUnfolderBase]: 442/796 cut-off events. [2024-06-28 01:06:32,194 INFO L125 PetriNetUnfolderBase]: For 853/853 co-relation queries the response was YES. [2024-06-28 01:06:32,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2547 conditions, 796 events. 442/796 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3578 event pairs, 104 based on Foata normal form. 21/816 useless extension candidates. Maximal degree in co-relation 2513. Up to 618 conditions per place. [2024-06-28 01:06:32,199 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 67 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-28 01:06:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 662 flow [2024-06-28 01:06:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:06:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:06:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-28 01:06:32,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-28 01:06:32,201 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 328 flow. Second operand 11 states and 159 transitions. [2024-06-28 01:06:32,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 662 flow [2024-06-28 01:06:32,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 616 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:32,206 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 410 flow [2024-06-28 01:06:32,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2024-06-28 01:06:32,206 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 39 predicate places. [2024-06-28 01:06:32,206 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 410 flow [2024-06-28 01:06:32,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 states have internal predecessors, (131), 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) [2024-06-28 01:06:32,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:32,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:32,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:32,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-28 01:06:32,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:32,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash 987935454, now seen corresponding path program 3 times [2024-06-28 01:06:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088301514] [2024-06-28 01:06:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:32,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:32,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088301514] [2024-06-28 01:06:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088301514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290350969] [2024-06-28 01:06:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:32,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:32,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:32,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:32,944 INFO L124 PetriNetUnfolderBase]: 460/826 cut-off events. [2024-06-28 01:06:32,945 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2024-06-28 01:06:32,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 826 events. 460/826 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3784 event pairs, 114 based on Foata normal form. 12/837 useless extension candidates. Maximal degree in co-relation 2878. Up to 749 conditions per place. [2024-06-28 01:06:32,952 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 57 selfloop transitions, 15 changer transitions 0/77 dead transitions. [2024-06-28 01:06:32,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 618 flow [2024-06-28 01:06:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-28 01:06:32,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-28 01:06:32,954 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 410 flow. Second operand 7 states and 102 transitions. [2024-06-28 01:06:32,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 618 flow [2024-06-28 01:06:32,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 589 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:32,959 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 426 flow [2024-06-28 01:06:32,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-06-28 01:06:32,960 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-28 01:06:32,960 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 426 flow [2024-06-28 01:06:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:32,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:32,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:32,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 01:06:32,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:32,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash -324319988, now seen corresponding path program 4 times [2024-06-28 01:06:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:32,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263169499] [2024-06-28 01:06:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:33,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263169499] [2024-06-28 01:06:33,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263169499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:33,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:33,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840080320] [2024-06-28 01:06:33,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:33,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:33,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 426 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:33,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:33,477 INFO L124 PetriNetUnfolderBase]: 455/820 cut-off events. [2024-06-28 01:06:33,477 INFO L125 PetriNetUnfolderBase]: For 1383/1383 co-relation queries the response was YES. [2024-06-28 01:06:33,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2916 conditions, 820 events. 455/820 cut-off events. For 1383/1383 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3733 event pairs, 141 based on Foata normal form. 5/824 useless extension candidates. Maximal degree in co-relation 2879. Up to 764 conditions per place. [2024-06-28 01:06:33,484 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 50 selfloop transitions, 12 changer transitions 4/71 dead transitions. [2024-06-28 01:06:33,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 573 flow [2024-06-28 01:06:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-28 01:06:33,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-28 01:06:33,485 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 426 flow. Second operand 7 states and 96 transitions. [2024-06-28 01:06:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 573 flow [2024-06-28 01:06:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 547 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:33,491 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 405 flow [2024-06-28 01:06:33,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=405, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-06-28 01:06:33,492 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 42 predicate places. [2024-06-28 01:06:33,492 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 405 flow [2024-06-28 01:06:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:33,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:33,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 01:06:33,493 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:33,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash 77547940, now seen corresponding path program 5 times [2024-06-28 01:06:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816305511] [2024-06-28 01:06:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816305511] [2024-06-28 01:06:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816305511] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502096868] [2024-06-28 01:06:33,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:06:33,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:33,762 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) [2024-06-28 01:06:33,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-28 01:06:33,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:06:33,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:33,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:06:33,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:33,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:33,948 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 29 treesize of output 25 [2024-06-28 01:06:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:33,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:34,054 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:06:34,055 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 40 treesize of output 56 [2024-06-28 01:06:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502096868] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:34,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-28 01:06:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 13 [2024-06-28 01:06:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541522509] [2024-06-28 01:06:34,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 01:06:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 01:06:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-28 01:06:34,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:34,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 405 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2024-06-28 01:06:34,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:34,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:34,278 INFO L124 PetriNetUnfolderBase]: 432/793 cut-off events. [2024-06-28 01:06:34,278 INFO L125 PetriNetUnfolderBase]: For 1397/1406 co-relation queries the response was YES. [2024-06-28 01:06:34,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2763 conditions, 793 events. 432/793 cut-off events. For 1397/1406 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3658 event pairs, 106 based on Foata normal form. 27/818 useless extension candidates. Maximal degree in co-relation 2726. Up to 620 conditions per place. [2024-06-28 01:06:34,284 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 57 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-28 01:06:34,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 604 flow [2024-06-28 01:06:34,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 01:06:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 01:06:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 01:06:34,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-28 01:06:34,285 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 405 flow. Second operand 6 states and 105 transitions. [2024-06-28 01:06:34,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 604 flow [2024-06-28 01:06:34,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 75 transitions, 580 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:34,291 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 413 flow [2024-06-28 01:06:34,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-06-28 01:06:34,291 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 41 predicate places. [2024-06-28 01:06:34,292 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 413 flow [2024-06-28 01:06:34,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 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) [2024-06-28 01:06:34,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:34,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:34,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-06-28 01:06:34,507 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:34,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash 903366326, now seen corresponding path program 5 times [2024-06-28 01:06:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:34,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916907146] [2024-06-28 01:06:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:34,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:34,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:34,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916907146] [2024-06-28 01:06:34,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916907146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:34,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:34,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:34,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247847779] [2024-06-28 01:06:34,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:34,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:34,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:34,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:34,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:34,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:34,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 413 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:34,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:34,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:34,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:35,025 INFO L124 PetriNetUnfolderBase]: 450/824 cut-off events. [2024-06-28 01:06:35,025 INFO L125 PetriNetUnfolderBase]: For 1564/1573 co-relation queries the response was YES. [2024-06-28 01:06:35,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 824 events. 450/824 cut-off events. For 1564/1573 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3840 event pairs, 137 based on Foata normal form. 18/840 useless extension candidates. Maximal degree in co-relation 2928. Up to 753 conditions per place. [2024-06-28 01:06:35,032 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 52 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-06-28 01:06:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 601 flow [2024-06-28 01:06:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-06-28 01:06:35,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-28 01:06:35,034 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 413 flow. Second operand 7 states and 96 transitions. [2024-06-28 01:06:35,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 601 flow [2024-06-28 01:06:35,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 579 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 01:06:35,040 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 436 flow [2024-06-28 01:06:35,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-06-28 01:06:35,041 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 44 predicate places. [2024-06-28 01:06:35,041 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 436 flow [2024-06-28 01:06:35,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:35,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:35,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 01:06:35,042 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:35,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash 941731122, now seen corresponding path program 6 times [2024-06-28 01:06:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:35,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564890704] [2024-06-28 01:06:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:35,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:35,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564890704] [2024-06-28 01:06:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564890704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:35,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:35,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233639016] [2024-06-28 01:06:35,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:35,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:35,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:35,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:35,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 436 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:35,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:35,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:35,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:35,505 INFO L124 PetriNetUnfolderBase]: 407/729 cut-off events. [2024-06-28 01:06:35,505 INFO L125 PetriNetUnfolderBase]: For 1688/1697 co-relation queries the response was YES. [2024-06-28 01:06:35,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2752 conditions, 729 events. 407/729 cut-off events. For 1688/1697 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3201 event pairs, 116 based on Foata normal form. 10/737 useless extension candidates. Maximal degree in co-relation 2713. Up to 682 conditions per place. [2024-06-28 01:06:35,511 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 46 selfloop transitions, 11 changer transitions 3/65 dead transitions. [2024-06-28 01:06:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 65 transitions, 554 flow [2024-06-28 01:06:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-28 01:06:35,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-28 01:06:35,513 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 436 flow. Second operand 7 states and 90 transitions. [2024-06-28 01:06:35,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 65 transitions, 554 flow [2024-06-28 01:06:35,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 528 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:35,519 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 408 flow [2024-06-28 01:06:35,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=408, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2024-06-28 01:06:35,519 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 45 predicate places. [2024-06-28 01:06:35,520 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 408 flow [2024-06-28 01:06:35,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:35,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:35,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:35,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 01:06:35,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:35,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1288692338, now seen corresponding path program 6 times [2024-06-28 01:06:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145754951] [2024-06-28 01:06:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:35,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:35,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:35,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145754951] [2024-06-28 01:06:35,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145754951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:35,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 01:06:35,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 01:06:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261948967] [2024-06-28 01:06:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:35,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:35,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 01:06:35,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:35,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:35,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:35,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:35,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:36,033 INFO L124 PetriNetUnfolderBase]: 363/645 cut-off events. [2024-06-28 01:06:36,033 INFO L125 PetriNetUnfolderBase]: For 1361/1370 co-relation queries the response was YES. [2024-06-28 01:06:36,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 645 events. 363/645 cut-off events. For 1361/1370 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2690 event pairs, 81 based on Foata normal form. 18/661 useless extension candidates. Maximal degree in co-relation 2438. Up to 516 conditions per place. [2024-06-28 01:06:36,038 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 53 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-06-28 01:06:36,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 73 transitions, 615 flow [2024-06-28 01:06:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 01:06:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 01:06:36,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-28 01:06:36,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-28 01:06:36,039 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 408 flow. Second operand 8 states and 107 transitions. [2024-06-28 01:06:36,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 73 transitions, 615 flow [2024-06-28 01:06:36,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 593 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 01:06:36,045 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 420 flow [2024-06-28 01:06:36,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2024-06-28 01:06:36,045 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 46 predicate places. [2024-06-28 01:06:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 420 flow [2024-06-28 01:06:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:36,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:36,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 01:06:36,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:36,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1065048229, now seen corresponding path program 1 times [2024-06-28 01:06:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:36,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275292083] [2024-06-28 01:06:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275292083] [2024-06-28 01:06:36,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275292083] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146770761] [2024-06-28 01:06:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:36,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:36,112 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) [2024-06-28 01:06:36,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-28 01:06:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:36,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:06:36,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:36,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:36,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146770761] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:36,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:36,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-28 01:06:36,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049698136] [2024-06-28 01:06:36,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:36,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:36,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:36,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:36,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:36,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 420 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2024-06-28 01:06:36,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:36,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:36,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:36,559 INFO L124 PetriNetUnfolderBase]: 772/1365 cut-off events. [2024-06-28 01:06:36,559 INFO L125 PetriNetUnfolderBase]: For 3009/3018 co-relation queries the response was YES. [2024-06-28 01:06:36,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4852 conditions, 1365 events. 772/1365 cut-off events. For 3009/3018 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6886 event pairs, 97 based on Foata normal form. 14/1377 useless extension candidates. Maximal degree in co-relation 4811. Up to 562 conditions per place. [2024-06-28 01:06:36,578 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 86 selfloop transitions, 20 changer transitions 2/113 dead transitions. [2024-06-28 01:06:36,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 904 flow [2024-06-28 01:06:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 01:06:36,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-06-28 01:06:36,579 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 420 flow. Second operand 7 states and 134 transitions. [2024-06-28 01:06:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 904 flow [2024-06-28 01:06:36,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 843 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 01:06:36,590 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 500 flow [2024-06-28 01:06:36,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=500, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-06-28 01:06:36,590 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-28 01:06:36,590 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 500 flow [2024-06-28 01:06:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2024-06-28 01:06:36,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:36,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:36,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:36,804 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:36,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 535327077, now seen corresponding path program 2 times [2024-06-28 01:06:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272441825] [2024-06-28 01:06:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:36,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:36,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272441825] [2024-06-28 01:06:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272441825] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:36,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276270809] [2024-06-28 01:06:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:06:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:36,921 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) [2024-06-28 01:06:36,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-28 01:06:37,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:06:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:37,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:06:37,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:37,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276270809] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:37,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:37,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-06-28 01:06:37,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633452410] [2024-06-28 01:06:37,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 01:06:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 01:06:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 01:06:37,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:37,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 500 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2024-06-28 01:06:37,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:37,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:37,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:37,419 INFO L124 PetriNetUnfolderBase]: 1204/2117 cut-off events. [2024-06-28 01:06:37,419 INFO L125 PetriNetUnfolderBase]: For 4402/4411 co-relation queries the response was YES. [2024-06-28 01:06:37,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7552 conditions, 2117 events. 1204/2117 cut-off events. For 4402/4411 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11783 event pairs, 315 based on Foata normal form. 14/2128 useless extension candidates. Maximal degree in co-relation 7511. Up to 1360 conditions per place. [2024-06-28 01:06:37,434 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 96 selfloop transitions, 17 changer transitions 2/120 dead transitions. [2024-06-28 01:06:37,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 120 transitions, 1009 flow [2024-06-28 01:06:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 01:06:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-06-28 01:06:37,436 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 500 flow. Second operand 7 states and 130 transitions. [2024-06-28 01:06:37,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 120 transitions, 1009 flow [2024-06-28 01:06:37,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 994 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:37,451 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 627 flow [2024-06-28 01:06:37,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=627, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-06-28 01:06:37,452 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 55 predicate places. [2024-06-28 01:06:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 627 flow [2024-06-28 01:06:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2024-06-28 01:06:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:37,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:37,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:37,675 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:37,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2114678481, now seen corresponding path program 3 times [2024-06-28 01:06:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363736171] [2024-06-28 01:06:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:37,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:37,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:37,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363736171] [2024-06-28 01:06:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363736171] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:37,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701341872] [2024-06-28 01:06:37,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:06:37,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:37,766 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) [2024-06-28 01:06:37,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-28 01:06:37,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-28 01:06:37,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:37,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:06:37,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:37,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:38,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701341872] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:38,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:38,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-06-28 01:06:38,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138048886] [2024-06-28 01:06:38,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-06-28 01:06:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-06-28 01:06:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-06-28 01:06:38,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:38,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 627 flow. Second operand has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 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) [2024-06-28 01:06:38,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:38,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:38,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:38,768 INFO L124 PetriNetUnfolderBase]: 2393/4343 cut-off events. [2024-06-28 01:06:38,768 INFO L125 PetriNetUnfolderBase]: For 11180/11189 co-relation queries the response was YES. [2024-06-28 01:06:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16499 conditions, 4343 events. 2393/4343 cut-off events. For 11180/11189 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28807 event pairs, 1439 based on Foata normal form. 183/4520 useless extension candidates. Maximal degree in co-relation 15568. Up to 2095 conditions per place. [2024-06-28 01:06:38,796 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 188 selfloop transitions, 39 changer transitions 0/232 dead transitions. [2024-06-28 01:06:38,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 232 transitions, 2368 flow [2024-06-28 01:06:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-28 01:06:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-28 01:06:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 259 transitions. [2024-06-28 01:06:38,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49053030303030304 [2024-06-28 01:06:38,798 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 627 flow. Second operand 16 states and 259 transitions. [2024-06-28 01:06:38,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 232 transitions, 2368 flow [2024-06-28 01:06:38,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 232 transitions, 2261 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-28 01:06:38,852 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1163 flow [2024-06-28 01:06:38,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1163, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-28 01:06:38,853 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-28 01:06:38,853 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1163 flow [2024-06-28 01:06:38,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 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) [2024-06-28 01:06:38,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:38,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:38,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-06-28 01:06:39,068 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:39,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1331895571, now seen corresponding path program 4 times [2024-06-28 01:06:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346204757] [2024-06-28 01:06:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:39,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:39,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:39,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346204757] [2024-06-28 01:06:39,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346204757] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:39,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313096424] [2024-06-28 01:06:39,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:06:39,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:39,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:39,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:39,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-28 01:06:39,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:06:39,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:39,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:06:39,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:39,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:06:39,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313096424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:06:39,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:06:39,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 12 [2024-06-28 01:06:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303298327] [2024-06-28 01:06:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:06:39,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:06:39,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:06:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:06:39,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:39,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1163 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 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) [2024-06-28 01:06:39,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:39,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:39,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:40,148 INFO L124 PetriNetUnfolderBase]: 2898/5381 cut-off events. [2024-06-28 01:06:40,148 INFO L125 PetriNetUnfolderBase]: For 14801/14801 co-relation queries the response was YES. [2024-06-28 01:06:40,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19923 conditions, 5381 events. 2898/5381 cut-off events. For 14801/14801 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39251 event pairs, 310 based on Foata normal form. 8/5383 useless extension candidates. Maximal degree in co-relation 18792. Up to 1604 conditions per place. [2024-06-28 01:06:40,191 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 111 selfloop transitions, 69 changer transitions 6/191 dead transitions. [2024-06-28 01:06:40,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 191 transitions, 1988 flow [2024-06-28 01:06:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:06:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:06:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 01:06:40,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121212121212121 [2024-06-28 01:06:40,193 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1163 flow. Second operand 10 states and 169 transitions. [2024-06-28 01:06:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 191 transitions, 1988 flow [2024-06-28 01:06:40,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 191 transitions, 1963 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 01:06:40,327 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 1429 flow [2024-06-28 01:06:40,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1429, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-06-28 01:06:40,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 85 predicate places. [2024-06-28 01:06:40,328 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 1429 flow [2024-06-28 01:06:40,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 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) [2024-06-28 01:06:40,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:40,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:40,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:40,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-06-28 01:06:40,540 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:40,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:40,541 INFO L85 PathProgramCache]: Analyzing trace with hash -173817771, now seen corresponding path program 5 times [2024-06-28 01:06:40,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:40,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122810880] [2024-06-28 01:06:40,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:40,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122810880] [2024-06-28 01:06:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122810880] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035595622] [2024-06-28 01:06:40,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:06:40,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:40,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:40,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-28 01:06:40,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:06:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:40,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:06:40,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:40,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:40,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035595622] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:40,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:40,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-06-28 01:06:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365916280] [2024-06-28 01:06:40,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:40,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-28 01:06:40,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-28 01:06:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-06-28 01:06:40,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:40,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 1429 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-06-28 01:06:40,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:40,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:40,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:41,465 INFO L124 PetriNetUnfolderBase]: 2070/3858 cut-off events. [2024-06-28 01:06:41,465 INFO L125 PetriNetUnfolderBase]: For 15048/15060 co-relation queries the response was YES. [2024-06-28 01:06:41,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16393 conditions, 3858 events. 2070/3858 cut-off events. For 15048/15060 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25726 event pairs, 1470 based on Foata normal form. 55/3908 useless extension candidates. Maximal degree in co-relation 16183. Up to 3270 conditions per place. [2024-06-28 01:06:41,493 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 93 selfloop transitions, 3 changer transitions 47/148 dead transitions. [2024-06-28 01:06:41,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 148 transitions, 1850 flow [2024-06-28 01:06:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 01:06:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48917748917748916 [2024-06-28 01:06:41,495 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 1429 flow. Second operand 7 states and 113 transitions. [2024-06-28 01:06:41,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 148 transitions, 1850 flow [2024-06-28 01:06:41,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1666 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 01:06:41,553 INFO L231 Difference]: Finished difference. Result has 115 places, 101 transitions, 974 flow [2024-06-28 01:06:41,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=115, PETRI_TRANSITIONS=101} [2024-06-28 01:06:41,554 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 84 predicate places. [2024-06-28 01:06:41,554 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 101 transitions, 974 flow [2024-06-28 01:06:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-06-28 01:06:41,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:41,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:41,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-06-28 01:06:41,768 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:41,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash -656188156, now seen corresponding path program 6 times [2024-06-28 01:06:41,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:41,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267633923] [2024-06-28 01:06:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:41,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:41,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267633923] [2024-06-28 01:06:41,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267633923] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:41,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357442415] [2024-06-28 01:06:41,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:06:41,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:41,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:41,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:41,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-28 01:06:41,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-28 01:06:41,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:41,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2024-06-28 01:06:41,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:42,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:42,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357442415] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:42,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:42,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-28 01:06:42,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228014772] [2024-06-28 01:06:42,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:42,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-28 01:06:42,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:42,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-28 01:06:42,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-06-28 01:06:42,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:42,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 101 transitions, 974 flow. Second operand has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:42,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:42,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:42,522 INFO L124 PetriNetUnfolderBase]: 1466/2680 cut-off events. [2024-06-28 01:06:42,522 INFO L125 PetriNetUnfolderBase]: For 9162/9167 co-relation queries the response was YES. [2024-06-28 01:06:42,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10843 conditions, 2680 events. 1466/2680 cut-off events. For 9162/9167 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16241 event pairs, 1064 based on Foata normal form. 27/2704 useless extension candidates. Maximal degree in co-relation 10799. Up to 2377 conditions per place. [2024-06-28 01:06:42,537 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 82 selfloop transitions, 4 changer transitions 36/127 dead transitions. [2024-06-28 01:06:42,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 127 transitions, 1393 flow [2024-06-28 01:06:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 01:06:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 01:06:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 01:06:42,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-28 01:06:42,538 INFO L175 Difference]: Start difference. First operand has 115 places, 101 transitions, 974 flow. Second operand 7 states and 111 transitions. [2024-06-28 01:06:42,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 127 transitions, 1393 flow [2024-06-28 01:06:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 127 transitions, 1335 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 01:06:42,564 INFO L231 Difference]: Finished difference. Result has 105 places, 91 transitions, 814 flow [2024-06-28 01:06:42,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=105, PETRI_TRANSITIONS=91} [2024-06-28 01:06:42,564 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 74 predicate places. [2024-06-28 01:06:42,565 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 91 transitions, 814 flow [2024-06-28 01:06:42,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 01:06:42,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:42,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:42,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:42,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-06-28 01:06:42,780 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:42,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1481269675, now seen corresponding path program 7 times [2024-06-28 01:06:42,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:42,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446545517] [2024-06-28 01:06:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:42,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:06:42,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446545517] [2024-06-28 01:06:42,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446545517] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:42,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073786706] [2024-06-28 01:06:42,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:06:42,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:42,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:42,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:42,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-28 01:06:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:43,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 01:06:43,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:06:43,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:06:43,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073786706] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:43,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:43,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-06-28 01:06:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427337236] [2024-06-28 01:06:43,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:43,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:06:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:06:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:06:43,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:43,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 91 transitions, 814 flow. Second operand has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 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) [2024-06-28 01:06:43,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:43,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:43,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:44,051 INFO L124 PetriNetUnfolderBase]: 1430/2588 cut-off events. [2024-06-28 01:06:44,051 INFO L125 PetriNetUnfolderBase]: For 8281/8295 co-relation queries the response was YES. [2024-06-28 01:06:44,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10282 conditions, 2588 events. 1430/2588 cut-off events. For 8281/8295 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15406 event pairs, 339 based on Foata normal form. 65/2650 useless extension candidates. Maximal degree in co-relation 10230. Up to 798 conditions per place. [2024-06-28 01:06:44,067 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 88 selfloop transitions, 43 changer transitions 0/136 dead transitions. [2024-06-28 01:06:44,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1387 flow [2024-06-28 01:06:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:06:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:06:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 159 transitions. [2024-06-28 01:06:44,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-28 01:06:44,069 INFO L175 Difference]: Start difference. First operand has 105 places, 91 transitions, 814 flow. Second operand 11 states and 159 transitions. [2024-06-28 01:06:44,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1387 flow [2024-06-28 01:06:44,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1315 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:44,097 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 968 flow [2024-06-28 01:06:44,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=968, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2024-06-28 01:06:44,098 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-28 01:06:44,098 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 968 flow [2024-06-28 01:06:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.380952380952381) internal successors, (239), 21 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) [2024-06-28 01:06:44,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:44,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:44,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:44,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-06-28 01:06:44,312 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:44,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:44,313 INFO L85 PathProgramCache]: Analyzing trace with hash -777585761, now seen corresponding path program 8 times [2024-06-28 01:06:44,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:44,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226195139] [2024-06-28 01:06:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:44,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:44,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:44,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226195139] [2024-06-28 01:06:44,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226195139] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:44,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276101552] [2024-06-28 01:06:44,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:06:44,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:44,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:44,493 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:44,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-28 01:06:44,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:06:44,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:44,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 01:06:44,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:44,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:06:44,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276101552] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:44,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-06-28 01:06:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245642792] [2024-06-28 01:06:44,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:44,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:06:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:06:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:06:45,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:06:45,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 968 flow. Second operand has 23 states, 23 states have (on average 11.304347826086957) internal successors, (260), 23 states have internal predecessors, (260), 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) [2024-06-28 01:06:45,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:45,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:06:45,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:45,402 INFO L124 PetriNetUnfolderBase]: 1456/2618 cut-off events. [2024-06-28 01:06:45,402 INFO L125 PetriNetUnfolderBase]: For 9756/9762 co-relation queries the response was YES. [2024-06-28 01:06:45,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10705 conditions, 2618 events. 1456/2618 cut-off events. For 9756/9762 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15617 event pairs, 360 based on Foata normal form. 55/2671 useless extension candidates. Maximal degree in co-relation 10652. Up to 1076 conditions per place. [2024-06-28 01:06:45,423 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 115 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-06-28 01:06:45,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 148 transitions, 1604 flow [2024-06-28 01:06:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 01:06:45,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 01:06:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-28 01:06:45,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46005509641873277 [2024-06-28 01:06:45,425 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 968 flow. Second operand 11 states and 167 transitions. [2024-06-28 01:06:45,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 148 transitions, 1604 flow [2024-06-28 01:06:45,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 148 transitions, 1556 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:45,456 INFO L231 Difference]: Finished difference. Result has 111 places, 97 transitions, 970 flow [2024-06-28 01:06:45,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=970, PETRI_PLACES=111, PETRI_TRANSITIONS=97} [2024-06-28 01:06:45,457 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-28 01:06:45,457 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 97 transitions, 970 flow [2024-06-28 01:06:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.304347826086957) internal successors, (260), 23 states have internal predecessors, (260), 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) [2024-06-28 01:06:45,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:45,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:45,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:45,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-06-28 01:06:45,671 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:45,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1596653374, now seen corresponding path program 1 times [2024-06-28 01:06:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:45,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572988792] [2024-06-28 01:06:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:45,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:46,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:46,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572988792] [2024-06-28 01:06:46,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572988792] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:46,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925185530] [2024-06-28 01:06:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:46,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:46,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:46,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-06-28 01:06:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:46,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:06:46,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:46,380 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-28 01:06:46,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-06-28 01:06:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:46,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:46,511 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:06:46,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:06:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:46,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925185530] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:46,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:46,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-28 01:06:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894977948] [2024-06-28 01:06:46,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:06:46,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:06:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:06:46,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:46,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 97 transitions, 970 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 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) [2024-06-28 01:06:46,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:46,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:46,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:47,522 INFO L124 PetriNetUnfolderBase]: 1821/3282 cut-off events. [2024-06-28 01:06:47,522 INFO L125 PetriNetUnfolderBase]: For 13844/13850 co-relation queries the response was YES. [2024-06-28 01:06:47,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14042 conditions, 3282 events. 1821/3282 cut-off events. For 13844/13850 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20059 event pairs, 402 based on Foata normal form. 42/3322 useless extension candidates. Maximal degree in co-relation 13987. Up to 1553 conditions per place. [2024-06-28 01:06:47,536 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 158 selfloop transitions, 59 changer transitions 1/223 dead transitions. [2024-06-28 01:06:47,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 223 transitions, 2335 flow [2024-06-28 01:06:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:06:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:06:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 272 transitions. [2024-06-28 01:06:47,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2024-06-28 01:06:47,538 INFO L175 Difference]: Start difference. First operand has 111 places, 97 transitions, 970 flow. Second operand 18 states and 272 transitions. [2024-06-28 01:06:47,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 223 transitions, 2335 flow [2024-06-28 01:06:47,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 223 transitions, 2313 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 01:06:47,572 INFO L231 Difference]: Finished difference. Result has 128 places, 118 transitions, 1409 flow [2024-06-28 01:06:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1409, PETRI_PLACES=128, PETRI_TRANSITIONS=118} [2024-06-28 01:06:47,573 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 97 predicate places. [2024-06-28 01:06:47,573 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 118 transitions, 1409 flow [2024-06-28 01:06:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 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) [2024-06-28 01:06:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:47,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:47,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:47,788 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:47,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1641918090, now seen corresponding path program 1 times [2024-06-28 01:06:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:47,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262237105] [2024-06-28 01:06:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:48,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:48,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262237105] [2024-06-28 01:06:48,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262237105] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:48,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106867755] [2024-06-28 01:06:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:48,400 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:48,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-06-28 01:06:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:48,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:06:48,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:48,643 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-28 01:06:48,648 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 35 treesize of output 20 [2024-06-28 01:06:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:48,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:48,772 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:06:48,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:06:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:48,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106867755] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:48,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-06-28 01:06:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291060370] [2024-06-28 01:06:48,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:06:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:06:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:06:48,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:48,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 118 transitions, 1409 flow. Second operand has 21 states, 21 states have (on average 10.0) internal successors, (210), 21 states have internal predecessors, (210), 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) [2024-06-28 01:06:48,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:48,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:48,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:49,765 INFO L124 PetriNetUnfolderBase]: 1861/3375 cut-off events. [2024-06-28 01:06:49,765 INFO L125 PetriNetUnfolderBase]: For 20295/20301 co-relation queries the response was YES. [2024-06-28 01:06:49,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16029 conditions, 3375 events. 1861/3375 cut-off events. For 20295/20301 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21034 event pairs, 661 based on Foata normal form. 14/3387 useless extension candidates. Maximal degree in co-relation 15966. Up to 2392 conditions per place. [2024-06-28 01:06:49,786 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 128 selfloop transitions, 37 changer transitions 35/205 dead transitions. [2024-06-28 01:06:49,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 205 transitions, 2356 flow [2024-06-28 01:06:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:06:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:06:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 243 transitions. [2024-06-28 01:06:49,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43315508021390375 [2024-06-28 01:06:49,788 INFO L175 Difference]: Start difference. First operand has 128 places, 118 transitions, 1409 flow. Second operand 17 states and 243 transitions. [2024-06-28 01:06:49,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 205 transitions, 2356 flow [2024-06-28 01:06:49,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 205 transitions, 2238 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-28 01:06:49,845 INFO L231 Difference]: Finished difference. Result has 139 places, 114 transitions, 1332 flow [2024-06-28 01:06:49,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1332, PETRI_PLACES=139, PETRI_TRANSITIONS=114} [2024-06-28 01:06:49,845 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 108 predicate places. [2024-06-28 01:06:49,845 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 114 transitions, 1332 flow [2024-06-28 01:06:49,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.0) internal successors, (210), 21 states have internal predecessors, (210), 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) [2024-06-28 01:06:49,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:49,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:49,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:50,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:50,050 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:50,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -80653448, now seen corresponding path program 2 times [2024-06-28 01:06:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496210272] [2024-06-28 01:06:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:50,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496210272] [2024-06-28 01:06:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496210272] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:50,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373509607] [2024-06-28 01:06:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:06:50,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:50,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:50,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-06-28 01:06:50,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:06:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:50,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:06:50,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:50,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:50,784 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 29 treesize of output 21 [2024-06-28 01:06:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:06:50,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:50,908 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:06:50,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:06:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:50,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373509607] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:50,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:50,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-28 01:06:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012690639] [2024-06-28 01:06:50,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:50,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:06:50,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:06:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:06:51,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:51,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 114 transitions, 1332 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:06:51,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:51,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:52,168 INFO L124 PetriNetUnfolderBase]: 2177/3933 cut-off events. [2024-06-28 01:06:52,168 INFO L125 PetriNetUnfolderBase]: For 28747/28747 co-relation queries the response was YES. [2024-06-28 01:06:52,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19407 conditions, 3933 events. 2177/3933 cut-off events. For 28747/28747 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 25472 event pairs, 627 based on Foata normal form. 24/3956 useless extension candidates. Maximal degree in co-relation 19340. Up to 2404 conditions per place. [2024-06-28 01:06:52,193 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 179 selfloop transitions, 77 changer transitions 2/263 dead transitions. [2024-06-28 01:06:52,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 263 transitions, 3151 flow [2024-06-28 01:06:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-06-28 01:06:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-06-28 01:06:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 334 transitions. [2024-06-28 01:06:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4400527009222661 [2024-06-28 01:06:52,194 INFO L175 Difference]: Start difference. First operand has 139 places, 114 transitions, 1332 flow. Second operand 23 states and 334 transitions. [2024-06-28 01:06:52,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 263 transitions, 3151 flow [2024-06-28 01:06:52,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 263 transitions, 2935 flow, removed 44 selfloop flow, removed 16 redundant places. [2024-06-28 01:06:52,255 INFO L231 Difference]: Finished difference. Result has 149 places, 152 transitions, 1974 flow [2024-06-28 01:06:52,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1974, PETRI_PLACES=149, PETRI_TRANSITIONS=152} [2024-06-28 01:06:52,256 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 118 predicate places. [2024-06-28 01:06:52,256 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 152 transitions, 1974 flow [2024-06-28 01:06:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:06:52,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:52,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:52,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:52,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:52,457 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:52,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 307428064, now seen corresponding path program 2 times [2024-06-28 01:06:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:52,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756985740] [2024-06-28 01:06:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:52,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:52,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756985740] [2024-06-28 01:06:52,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756985740] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:52,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566116978] [2024-06-28 01:06:52,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:06:52,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:52,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:52,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-06-28 01:06:53,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:06:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:53,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:06:53,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:53,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:53,259 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 29 treesize of output 21 [2024-06-28 01:06:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:06:53,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:53,366 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:06:53,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:06:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:06:53,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566116978] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:53,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:53,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-28 01:06:53,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440358571] [2024-06-28 01:06:53,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:53,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:06:53,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:06:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:06:53,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:06:53,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 152 transitions, 1974 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:06:53,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:53,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:06:53,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:54,934 INFO L124 PetriNetUnfolderBase]: 2501/4535 cut-off events. [2024-06-28 01:06:54,934 INFO L125 PetriNetUnfolderBase]: For 39523/39523 co-relation queries the response was YES. [2024-06-28 01:06:54,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23439 conditions, 4535 events. 2501/4535 cut-off events. For 39523/39523 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30057 event pairs, 645 based on Foata normal form. 16/4550 useless extension candidates. Maximal degree in co-relation 23368. Up to 2634 conditions per place. [2024-06-28 01:06:54,969 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 214 selfloop transitions, 116 changer transitions 14/349 dead transitions. [2024-06-28 01:06:54,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 349 transitions, 4304 flow [2024-06-28 01:06:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-06-28 01:06:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-06-28 01:06:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 486 transitions. [2024-06-28 01:06:54,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-28 01:06:54,977 INFO L175 Difference]: Start difference. First operand has 149 places, 152 transitions, 1974 flow. Second operand 36 states and 486 transitions. [2024-06-28 01:06:54,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 349 transitions, 4304 flow [2024-06-28 01:06:55,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 349 transitions, 3992 flow, removed 108 selfloop flow, removed 13 redundant places. [2024-06-28 01:06:55,134 INFO L231 Difference]: Finished difference. Result has 179 places, 193 transitions, 2748 flow [2024-06-28 01:06:55,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2748, PETRI_PLACES=179, PETRI_TRANSITIONS=193} [2024-06-28 01:06:55,134 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 148 predicate places. [2024-06-28 01:06:55,135 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 193 transitions, 2748 flow [2024-06-28 01:06:55,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:06:55,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:06:55,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:06:55,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-06-28 01:06:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:55,344 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:06:55,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:06:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1791568464, now seen corresponding path program 3 times [2024-06-28 01:06:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:06:55,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682711774] [2024-06-28 01:06:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:06:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:06:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:06:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:06:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:06:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682711774] [2024-06-28 01:06:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682711774] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:06:55,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392094968] [2024-06-28 01:06:55,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:06:55,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:06:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:06:55,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:06:55,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-06-28 01:06:55,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-28 01:06:55,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:06:55,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2024-06-28 01:06:55,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:06:55,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-28 01:06:55,956 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 [2024-06-28 01:06:55,988 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:06:55,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-28 01:06:56,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 01:06:56,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 01:06:56,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:56,255 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 29 treesize of output 21 [2024-06-28 01:06:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:06:56,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:06:56,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:56,664 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 66 [2024-06-28 01:06:56,712 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-06-28 01:06:56,712 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 208 treesize of output 184 [2024-06-28 01:06:56,723 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-28 01:06:56,725 INFO L173 IndexEqualityManager]: detected equality via solver [2024-06-28 01:06:56,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:06:56,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 140 treesize of output 132 [2024-06-28 01:06:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:06:56,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392094968] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:06:56,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:06:56,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2024-06-28 01:06:56,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624588134] [2024-06-28 01:06:56,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:06:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-28 01:06:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:06:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-28 01:06:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=877, Unknown=7, NotChecked=0, Total=1056 [2024-06-28 01:06:57,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-28 01:06:57,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 193 transitions, 2748 flow. Second operand has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 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) [2024-06-28 01:06:57,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:06:57,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-28 01:06:57,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:06:59,500 INFO L124 PetriNetUnfolderBase]: 4711/8087 cut-off events. [2024-06-28 01:06:59,500 INFO L125 PetriNetUnfolderBase]: For 78809/78809 co-relation queries the response was YES. [2024-06-28 01:06:59,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 8087 events. 4711/8087 cut-off events. For 78809/78809 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 55283 event pairs, 1372 based on Foata normal form. 21/8107 useless extension candidates. Maximal degree in co-relation 42108. Up to 5555 conditions per place. [2024-06-28 01:06:59,557 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 267 selfloop transitions, 93 changer transitions 20/384 dead transitions. [2024-06-28 01:06:59,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 384 transitions, 4999 flow [2024-06-28 01:06:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-28 01:06:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-28 01:06:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 397 transitions. [2024-06-28 01:06:59,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148380355276907 [2024-06-28 01:06:59,558 INFO L175 Difference]: Start difference. First operand has 179 places, 193 transitions, 2748 flow. Second operand 29 states and 397 transitions. [2024-06-28 01:06:59,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 384 transitions, 4999 flow [2024-06-28 01:07:00,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 384 transitions, 4649 flow, removed 86 selfloop flow, removed 22 redundant places. [2024-06-28 01:07:00,086 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 3267 flow [2024-06-28 01:07:00,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3267, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-28 01:07:00,086 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-28 01:07:00,086 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 3267 flow [2024-06-28 01:07:00,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 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) [2024-06-28 01:07:00,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:00,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:00,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:00,296 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:00,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 295168298, now seen corresponding path program 3 times [2024-06-28 01:07:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656896090] [2024-06-28 01:07:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:00,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656896090] [2024-06-28 01:07:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656896090] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:00,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186820586] [2024-06-28 01:07:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:00,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:00,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:00,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-06-28 01:07:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 01:07:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:00,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-28 01:07:00,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:01,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:01,101 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 33 treesize of output 25 [2024-06-28 01:07:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-28 01:07:01,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:01,228 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:01,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:01,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186820586] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:01,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:01,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-06-28 01:07:01,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142790135] [2024-06-28 01:07:01,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:01,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:07:01,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:01,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:07:01,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:07:01,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:01,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 3267 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:01,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:01,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:01,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:03,263 INFO L124 PetriNetUnfolderBase]: 3072/5612 cut-off events. [2024-06-28 01:07:03,263 INFO L125 PetriNetUnfolderBase]: For 64596/64596 co-relation queries the response was YES. [2024-06-28 01:07:03,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29899 conditions, 5612 events. 3072/5612 cut-off events. For 64596/64596 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39461 event pairs, 750 based on Foata normal form. 112/5723 useless extension candidates. Maximal degree in co-relation 29817. Up to 2871 conditions per place. [2024-06-28 01:07:03,410 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 246 selfloop transitions, 160 changer transitions 9/420 dead transitions. [2024-06-28 01:07:03,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 420 transitions, 5580 flow [2024-06-28 01:07:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-06-28 01:07:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-06-28 01:07:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 572 transitions. [2024-06-28 01:07:03,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-28 01:07:03,414 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 3267 flow. Second operand 43 states and 572 transitions. [2024-06-28 01:07:03,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 420 transitions, 5580 flow [2024-06-28 01:07:03,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 420 transitions, 5459 flow, removed 17 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:03,586 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 3868 flow [2024-06-28 01:07:03,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3868, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-06-28 01:07:03,587 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 189 predicate places. [2024-06-28 01:07:03,587 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 3868 flow [2024-06-28 01:07:03,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:03,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:03,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:03,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:03,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:03,788 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:03,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:03,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1705280060, now seen corresponding path program 4 times [2024-06-28 01:07:03,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:03,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041619599] [2024-06-28 01:07:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:03,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041619599] [2024-06-28 01:07:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041619599] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849594232] [2024-06-28 01:07:04,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:07:04,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:04,178 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:04,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-06-28 01:07:04,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:07:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:04,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-28 01:07:04,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:04,521 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:07:04,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-28 01:07:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:04,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:04,631 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:04,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:04,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849594232] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:04,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:04,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-06-28 01:07:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136034850] [2024-06-28 01:07:04,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:04,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:07:04,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:07:04,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:07:04,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:04,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 3868 flow. Second operand has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-06-28 01:07:04,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:04,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:04,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:06,130 INFO L124 PetriNetUnfolderBase]: 2987/5445 cut-off events. [2024-06-28 01:07:06,130 INFO L125 PetriNetUnfolderBase]: For 86457/86457 co-relation queries the response was YES. [2024-06-28 01:07:06,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31641 conditions, 5445 events. 2987/5445 cut-off events. For 86457/86457 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37902 event pairs, 805 based on Foata normal form. 30/5474 useless extension candidates. Maximal degree in co-relation 31552. Up to 3310 conditions per place. [2024-06-28 01:07:06,178 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 204 selfloop transitions, 109 changer transitions 30/348 dead transitions. [2024-06-28 01:07:06,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 348 transitions, 5272 flow [2024-06-28 01:07:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-28 01:07:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-28 01:07:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 339 transitions. [2024-06-28 01:07:06,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-28 01:07:06,181 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 3868 flow. Second operand 24 states and 339 transitions. [2024-06-28 01:07:06,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 348 transitions, 5272 flow [2024-06-28 01:07:06,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 4909 flow, removed 28 selfloop flow, removed 33 redundant places. [2024-06-28 01:07:06,513 INFO L231 Difference]: Finished difference. Result has 208 places, 236 transitions, 3580 flow [2024-06-28 01:07:06,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3580, PETRI_PLACES=208, PETRI_TRANSITIONS=236} [2024-06-28 01:07:06,514 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-06-28 01:07:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 236 transitions, 3580 flow [2024-06-28 01:07:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-06-28 01:07:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:06,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:06,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-06-28 01:07:06,715 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:06,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:06,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1429648570, now seen corresponding path program 4 times [2024-06-28 01:07:06,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:06,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373637989] [2024-06-28 01:07:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373637989] [2024-06-28 01:07:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373637989] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940216715] [2024-06-28 01:07:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:07:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:07,083 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:07,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-06-28 01:07:07,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:07:07,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:07,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 23 conjunts are in the unsatisfiable core [2024-06-28 01:07:07,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:07,369 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-28 01:07:07,369 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 30 treesize of output 10 [2024-06-28 01:07:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:07,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:07,477 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:07,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940216715] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:07,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:07,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2024-06-28 01:07:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233107457] [2024-06-28 01:07:07,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:07,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:07:07,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:07:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:07:07,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:07,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 236 transitions, 3580 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:07,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:07,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:07,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:09,496 INFO L124 PetriNetUnfolderBase]: 3044/5475 cut-off events. [2024-06-28 01:07:09,496 INFO L125 PetriNetUnfolderBase]: For 98001/98001 co-relation queries the response was YES. [2024-06-28 01:07:09,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31532 conditions, 5475 events. 3044/5475 cut-off events. For 98001/98001 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 37500 event pairs, 452 based on Foata normal form. 219/5693 useless extension candidates. Maximal degree in co-relation 31464. Up to 2300 conditions per place. [2024-06-28 01:07:09,539 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 255 selfloop transitions, 206 changer transitions 9/475 dead transitions. [2024-06-28 01:07:09,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 475 transitions, 6632 flow [2024-06-28 01:07:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-06-28 01:07:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-06-28 01:07:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 598 transitions. [2024-06-28 01:07:09,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314574314574315 [2024-06-28 01:07:09,541 INFO L175 Difference]: Start difference. First operand has 208 places, 236 transitions, 3580 flow. Second operand 42 states and 598 transitions. [2024-06-28 01:07:09,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 475 transitions, 6632 flow [2024-06-28 01:07:09,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 475 transitions, 6342 flow, removed 0 selfloop flow, removed 18 redundant places. [2024-06-28 01:07:09,764 INFO L231 Difference]: Finished difference. Result has 234 places, 293 transitions, 4835 flow [2024-06-28 01:07:09,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4835, PETRI_PLACES=234, PETRI_TRANSITIONS=293} [2024-06-28 01:07:09,764 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-06-28 01:07:09,764 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 293 transitions, 4835 flow [2024-06-28 01:07:09,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:09,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:09,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:09,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:09,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-06-28 01:07:09,966 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:09,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1522184822, now seen corresponding path program 5 times [2024-06-28 01:07:09,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:09,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059303365] [2024-06-28 01:07:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:10,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059303365] [2024-06-28 01:07:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059303365] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:10,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554556204] [2024-06-28 01:07:10,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:07:10,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:10,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:10,342 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:10,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-06-28 01:07:10,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-28 01:07:10,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:10,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-28 01:07:10,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:10,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:10,613 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 33 treesize of output 25 [2024-06-28 01:07:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:10,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:10,754 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:10,755 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 40 treesize of output 56 [2024-06-28 01:07:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554556204] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:10,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:10,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 19 [2024-06-28 01:07:10,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508161858] [2024-06-28 01:07:10,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:07:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:07:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:07:10,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:10,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 293 transitions, 4835 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2024-06-28 01:07:10,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:10,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:12,304 INFO L124 PetriNetUnfolderBase]: 3162/5707 cut-off events. [2024-06-28 01:07:12,304 INFO L125 PetriNetUnfolderBase]: For 154537/154540 co-relation queries the response was YES. [2024-06-28 01:07:12,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36424 conditions, 5707 events. 3162/5707 cut-off events. For 154537/154540 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39678 event pairs, 876 based on Foata normal form. 17/5722 useless extension candidates. Maximal degree in co-relation 36345. Up to 3772 conditions per place. [2024-06-28 01:07:12,348 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 234 selfloop transitions, 135 changer transitions 16/390 dead transitions. [2024-06-28 01:07:12,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 390 transitions, 6622 flow [2024-06-28 01:07:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-28 01:07:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-28 01:07:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 299 transitions. [2024-06-28 01:07:12,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118457300275482 [2024-06-28 01:07:12,351 INFO L175 Difference]: Start difference. First operand has 234 places, 293 transitions, 4835 flow. Second operand 22 states and 299 transitions. [2024-06-28 01:07:12,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 390 transitions, 6622 flow [2024-06-28 01:07:12,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 390 transitions, 5988 flow, removed 195 selfloop flow, removed 25 redundant places. [2024-06-28 01:07:12,785 INFO L231 Difference]: Finished difference. Result has 234 places, 320 transitions, 5254 flow [2024-06-28 01:07:12,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5254, PETRI_PLACES=234, PETRI_TRANSITIONS=320} [2024-06-28 01:07:12,786 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-06-28 01:07:12,786 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 320 transitions, 5254 flow [2024-06-28 01:07:12,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2024-06-28 01:07:12,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:12,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:12,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:12,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-06-28 01:07:12,988 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:12,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:12,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2128067060, now seen corresponding path program 5 times [2024-06-28 01:07:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283287571] [2024-06-28 01:07:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:13,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:13,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283287571] [2024-06-28 01:07:13,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283287571] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:13,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915709896] [2024-06-28 01:07:13,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:07:13,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:13,346 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:13,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-06-28 01:07:13,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:07:13,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:13,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 35 conjunts are in the unsatisfiable core [2024-06-28 01:07:13,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:13,792 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:07:13,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-28 01:07:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:13,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:13,878 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:13,879 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 40 treesize of output 56 [2024-06-28 01:07:13,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:13,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915709896] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:13,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:13,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 21 [2024-06-28 01:07:13,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976699701] [2024-06-28 01:07:13,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:13,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:07:13,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:07:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:07:14,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:14,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 320 transitions, 5254 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:14,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:14,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:14,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:15,258 INFO L124 PetriNetUnfolderBase]: 3064/5520 cut-off events. [2024-06-28 01:07:15,258 INFO L125 PetriNetUnfolderBase]: For 125429/125432 co-relation queries the response was YES. [2024-06-28 01:07:15,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34433 conditions, 5520 events. 3064/5520 cut-off events. For 125429/125432 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37980 event pairs, 851 based on Foata normal form. 14/5532 useless extension candidates. Maximal degree in co-relation 34357. Up to 4069 conditions per place. [2024-06-28 01:07:15,304 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 239 selfloop transitions, 113 changer transitions 13/370 dead transitions. [2024-06-28 01:07:15,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 370 transitions, 6209 flow [2024-06-28 01:07:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:07:15,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:07:15,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 228 transitions. [2024-06-28 01:07:15,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2024-06-28 01:07:15,306 INFO L175 Difference]: Start difference. First operand has 234 places, 320 transitions, 5254 flow. Second operand 17 states and 228 transitions. [2024-06-28 01:07:15,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 370 transitions, 6209 flow [2024-06-28 01:07:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 370 transitions, 5680 flow, removed 174 selfloop flow, removed 15 redundant places. [2024-06-28 01:07:15,904 INFO L231 Difference]: Finished difference. Result has 235 places, 321 transitions, 4999 flow [2024-06-28 01:07:15,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4999, PETRI_PLACES=235, PETRI_TRANSITIONS=321} [2024-06-28 01:07:15,905 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2024-06-28 01:07:15,905 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 321 transitions, 4999 flow [2024-06-28 01:07:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 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) [2024-06-28 01:07:15,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:15,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:15,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:16,108 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:16,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 197771014, now seen corresponding path program 6 times [2024-06-28 01:07:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219203630] [2024-06-28 01:07:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:16,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219203630] [2024-06-28 01:07:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219203630] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000009852] [2024-06-28 01:07:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:07:16,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:16,445 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-06-28 01:07:16,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-28 01:07:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:16,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:16,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:16,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:16,823 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 29 treesize of output 21 [2024-06-28 01:07:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:16,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:16,911 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:16,912 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 40 treesize of output 56 [2024-06-28 01:07:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:16,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000009852] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:16,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:16,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-28 01:07:16,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195945138] [2024-06-28 01:07:16,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:16,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:07:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:07:16,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:07:17,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:17,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 321 transitions, 4999 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:17,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:17,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:18,336 INFO L124 PetriNetUnfolderBase]: 3052/5476 cut-off events. [2024-06-28 01:07:18,337 INFO L125 PetriNetUnfolderBase]: For 58393/58396 co-relation queries the response was YES. [2024-06-28 01:07:18,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30771 conditions, 5476 events. 3052/5476 cut-off events. For 58393/58396 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 37296 event pairs, 815 based on Foata normal form. 38/5512 useless extension candidates. Maximal degree in co-relation 30696. Up to 3779 conditions per place. [2024-06-28 01:07:18,387 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 240 selfloop transitions, 143 changer transitions 1/389 dead transitions. [2024-06-28 01:07:18,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 389 transitions, 6130 flow [2024-06-28 01:07:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 01:07:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 01:07:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 283 transitions. [2024-06-28 01:07:18,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083694083694084 [2024-06-28 01:07:18,388 INFO L175 Difference]: Start difference. First operand has 235 places, 321 transitions, 4999 flow. Second operand 21 states and 283 transitions. [2024-06-28 01:07:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 389 transitions, 6130 flow [2024-06-28 01:07:18,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 389 transitions, 5875 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-06-28 01:07:18,671 INFO L231 Difference]: Finished difference. Result has 238 places, 327 transitions, 5132 flow [2024-06-28 01:07:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5132, PETRI_PLACES=238, PETRI_TRANSITIONS=327} [2024-06-28 01:07:18,672 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 207 predicate places. [2024-06-28 01:07:18,672 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 327 transitions, 5132 flow [2024-06-28 01:07:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:18,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:18,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:18,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-06-28 01:07:18,873 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:18,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 838810576, now seen corresponding path program 7 times [2024-06-28 01:07:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516409954] [2024-06-28 01:07:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:18,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:19,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516409954] [2024-06-28 01:07:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516409954] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233162336] [2024-06-28 01:07:19,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:07:19,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:19,322 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:19,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-06-28 01:07:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:19,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:07:19,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:19,519 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-28 01:07:19,520 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 34 treesize of output 10 [2024-06-28 01:07:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:19,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:19,588 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:19,589 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 40 treesize of output 56 [2024-06-28 01:07:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233162336] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:19,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-28 01:07:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015414216] [2024-06-28 01:07:19,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:19,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:07:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:07:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:07:19,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 327 transitions, 5132 flow. Second operand has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 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) [2024-06-28 01:07:19,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:19,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:19,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:20,929 INFO L124 PetriNetUnfolderBase]: 3144/5639 cut-off events. [2024-06-28 01:07:20,929 INFO L125 PetriNetUnfolderBase]: For 62747/62750 co-relation queries the response was YES. [2024-06-28 01:07:20,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32295 conditions, 5639 events. 3144/5639 cut-off events. For 62747/62750 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38664 event pairs, 729 based on Foata normal form. 38/5675 useless extension candidates. Maximal degree in co-relation 32223. Up to 3452 conditions per place. [2024-06-28 01:07:20,973 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 250 selfloop transitions, 148 changer transitions 1/404 dead transitions. [2024-06-28 01:07:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 404 transitions, 6544 flow [2024-06-28 01:07:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:07:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:07:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 259 transitions. [2024-06-28 01:07:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43602693602693604 [2024-06-28 01:07:20,975 INFO L175 Difference]: Start difference. First operand has 238 places, 327 transitions, 5132 flow. Second operand 18 states and 259 transitions. [2024-06-28 01:07:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 404 transitions, 6544 flow [2024-06-28 01:07:21,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 404 transitions, 6241 flow, removed 5 selfloop flow, removed 19 redundant places. [2024-06-28 01:07:21,229 INFO L231 Difference]: Finished difference. Result has 239 places, 329 transitions, 5242 flow [2024-06-28 01:07:21,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5242, PETRI_PLACES=239, PETRI_TRANSITIONS=329} [2024-06-28 01:07:21,230 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2024-06-28 01:07:21,230 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 329 transitions, 5242 flow [2024-06-28 01:07:21,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 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) [2024-06-28 01:07:21,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:21,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:21,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-06-28 01:07:21,431 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:21,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash 756427102, now seen corresponding path program 6 times [2024-06-28 01:07:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903301828] [2024-06-28 01:07:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:21,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903301828] [2024-06-28 01:07:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903301828] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944379386] [2024-06-28 01:07:21,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:07:21,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:21,773 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:21,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-06-28 01:07:21,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:07:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:21,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:21,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:22,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:22,090 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 29 treesize of output 21 [2024-06-28 01:07:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:22,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:22,171 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:22,171 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 40 treesize of output 56 [2024-06-28 01:07:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944379386] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:22,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-28 01:07:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845096377] [2024-06-28 01:07:22,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:07:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:07:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:07:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 329 transitions, 5242 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:22,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:22,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:23,848 INFO L124 PetriNetUnfolderBase]: 3204/5787 cut-off events. [2024-06-28 01:07:23,849 INFO L125 PetriNetUnfolderBase]: For 68236/68239 co-relation queries the response was YES. [2024-06-28 01:07:23,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33558 conditions, 5787 events. 3204/5787 cut-off events. For 68236/68239 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40150 event pairs, 745 based on Foata normal form. 34/5819 useless extension candidates. Maximal degree in co-relation 33483. Up to 3995 conditions per place. [2024-06-28 01:07:23,892 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 284 selfloop transitions, 133 changer transitions 7/429 dead transitions. [2024-06-28 01:07:23,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 429 transitions, 6698 flow [2024-06-28 01:07:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 01:07:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 01:07:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 341 transitions. [2024-06-28 01:07:23,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-06-28 01:07:23,896 INFO L175 Difference]: Start difference. First operand has 239 places, 329 transitions, 5242 flow. Second operand 25 states and 341 transitions. [2024-06-28 01:07:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 429 transitions, 6698 flow [2024-06-28 01:07:24,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 429 transitions, 6430 flow, removed 14 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:24,188 INFO L231 Difference]: Finished difference. Result has 253 places, 340 transitions, 5503 flow [2024-06-28 01:07:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5503, PETRI_PLACES=253, PETRI_TRANSITIONS=340} [2024-06-28 01:07:24,189 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 222 predicate places. [2024-06-28 01:07:24,189 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 340 transitions, 5503 flow [2024-06-28 01:07:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:24,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:24,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-06-28 01:07:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-06-28 01:07:24,394 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1804352752, now seen corresponding path program 8 times [2024-06-28 01:07:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233371532] [2024-06-28 01:07:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233371532] [2024-06-28 01:07:24,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233371532] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508993960] [2024-06-28 01:07:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:24,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:24,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:24,737 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:24,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-06-28 01:07:24,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:07:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:24,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:24,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:25,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:25,039 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 29 treesize of output 21 [2024-06-28 01:07:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:25,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:25,125 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:25,126 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 40 treesize of output 56 [2024-06-28 01:07:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:07:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508993960] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:25,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:25,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-28 01:07:25,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773847774] [2024-06-28 01:07:25,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:07:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:07:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:07:25,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:25,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 340 transitions, 5503 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:25,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:25,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:25,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:26,596 INFO L124 PetriNetUnfolderBase]: 3184/5731 cut-off events. [2024-06-28 01:07:26,596 INFO L125 PetriNetUnfolderBase]: For 72649/72649 co-relation queries the response was YES. [2024-06-28 01:07:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33995 conditions, 5731 events. 3184/5731 cut-off events. For 72649/72649 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39111 event pairs, 871 based on Foata normal form. 15/5745 useless extension candidates. Maximal degree in co-relation 33917. Up to 4302 conditions per place. [2024-06-28 01:07:26,646 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 264 selfloop transitions, 123 changer transitions 9/401 dead transitions. [2024-06-28 01:07:26,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 401 transitions, 6664 flow [2024-06-28 01:07:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:07:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:07:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 259 transitions. [2024-06-28 01:07:26,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924242424242424 [2024-06-28 01:07:26,648 INFO L175 Difference]: Start difference. First operand has 253 places, 340 transitions, 5503 flow. Second operand 20 states and 259 transitions. [2024-06-28 01:07:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 401 transitions, 6664 flow [2024-06-28 01:07:26,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 401 transitions, 6459 flow, removed 43 selfloop flow, removed 12 redundant places. [2024-06-28 01:07:26,970 INFO L231 Difference]: Finished difference. Result has 260 places, 348 transitions, 5730 flow [2024-06-28 01:07:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5730, PETRI_PLACES=260, PETRI_TRANSITIONS=348} [2024-06-28 01:07:26,971 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 229 predicate places. [2024-06-28 01:07:26,971 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 348 transitions, 5730 flow [2024-06-28 01:07:26,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:26,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:26,972 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:26,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:27,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:27,174 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:27,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1789251298, now seen corresponding path program 7 times [2024-06-28 01:07:27,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:27,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854940911] [2024-06-28 01:07:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:27,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854940911] [2024-06-28 01:07:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854940911] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402317292] [2024-06-28 01:07:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:07:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:27,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:27,528 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:27,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-06-28 01:07:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:27,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:07:27,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:27,720 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:27,720 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 37 treesize of output 25 [2024-06-28 01:07:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:27,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:27,790 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:27,790 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 40 treesize of output 56 [2024-06-28 01:07:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:27,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402317292] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:27,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:27,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-06-28 01:07:27,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487817097] [2024-06-28 01:07:27,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:27,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:07:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:07:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:07:27,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:27,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 348 transitions, 5730 flow. Second operand has 19 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 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) [2024-06-28 01:07:27,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:27,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:27,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:29,067 INFO L124 PetriNetUnfolderBase]: 2866/5107 cut-off events. [2024-06-28 01:07:29,067 INFO L125 PetriNetUnfolderBase]: For 68428/68431 co-relation queries the response was YES. [2024-06-28 01:07:29,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31084 conditions, 5107 events. 2866/5107 cut-off events. For 68428/68431 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33708 event pairs, 721 based on Foata normal form. 86/5191 useless extension candidates. Maximal degree in co-relation 31001. Up to 3936 conditions per place. [2024-06-28 01:07:29,116 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 256 selfloop transitions, 125 changer transitions 2/388 dead transitions. [2024-06-28 01:07:29,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 388 transitions, 6624 flow [2024-06-28 01:07:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:07:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:07:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 249 transitions. [2024-06-28 01:07:29,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39712918660287083 [2024-06-28 01:07:29,118 INFO L175 Difference]: Start difference. First operand has 260 places, 348 transitions, 5730 flow. Second operand 19 states and 249 transitions. [2024-06-28 01:07:29,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 388 transitions, 6624 flow [2024-06-28 01:07:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 388 transitions, 6316 flow, removed 33 selfloop flow, removed 19 redundant places. [2024-06-28 01:07:29,422 INFO L231 Difference]: Finished difference. Result has 256 places, 338 transitions, 5575 flow [2024-06-28 01:07:29,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5575, PETRI_PLACES=256, PETRI_TRANSITIONS=338} [2024-06-28 01:07:29,423 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-06-28 01:07:29,423 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 338 transitions, 5575 flow [2024-06-28 01:07:29,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.052631578947368) internal successors, (191), 19 states have internal predecessors, (191), 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) [2024-06-28 01:07:29,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:29,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:29,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:29,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:29,624 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash 803104232, now seen corresponding path program 8 times [2024-06-28 01:07:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:29,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759042374] [2024-06-28 01:07:29,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:29,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:30,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:30,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759042374] [2024-06-28 01:07:30,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759042374] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:30,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109370536] [2024-06-28 01:07:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:30,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:30,003 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:30,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-06-28 01:07:30,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:07:30,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:30,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:30,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:30,382 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:07:30,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-28 01:07:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:30,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:30,501 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:30,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:30,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109370536] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:30,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:30,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 22 [2024-06-28 01:07:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038411187] [2024-06-28 01:07:30,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:30,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:07:30,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:07:30,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:07:30,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:30,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 338 transitions, 5575 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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) [2024-06-28 01:07:30,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:30,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:30,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:31,828 INFO L124 PetriNetUnfolderBase]: 2954/5269 cut-off events. [2024-06-28 01:07:31,829 INFO L125 PetriNetUnfolderBase]: For 67632/67635 co-relation queries the response was YES. [2024-06-28 01:07:31,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31961 conditions, 5269 events. 2954/5269 cut-off events. For 67632/67635 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 35158 event pairs, 647 based on Foata normal form. 14/5281 useless extension candidates. Maximal degree in co-relation 31886. Up to 4276 conditions per place. [2024-06-28 01:07:31,875 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 357 selfloop transitions, 56 changer transitions 20/438 dead transitions. [2024-06-28 01:07:31,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 438 transitions, 7348 flow [2024-06-28 01:07:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:07:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:07:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 263 transitions. [2024-06-28 01:07:31,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194577352472089 [2024-06-28 01:07:31,876 INFO L175 Difference]: Start difference. First operand has 256 places, 338 transitions, 5575 flow. Second operand 19 states and 263 transitions. [2024-06-28 01:07:31,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 438 transitions, 7348 flow [2024-06-28 01:07:32,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 438 transitions, 7078 flow, removed 5 selfloop flow, removed 19 redundant places. [2024-06-28 01:07:32,179 INFO L231 Difference]: Finished difference. Result has 261 places, 360 transitions, 5861 flow [2024-06-28 01:07:32,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5861, PETRI_PLACES=261, PETRI_TRANSITIONS=360} [2024-06-28 01:07:32,179 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 230 predicate places. [2024-06-28 01:07:32,180 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 360 transitions, 5861 flow [2024-06-28 01:07:32,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 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) [2024-06-28 01:07:32,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:32,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:32,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:32,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:32,385 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:32,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:32,386 INFO L85 PathProgramCache]: Analyzing trace with hash 386575808, now seen corresponding path program 9 times [2024-06-28 01:07:32,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928234378] [2024-06-28 01:07:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:32,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:32,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928234378] [2024-06-28 01:07:32,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928234378] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:32,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706055460] [2024-06-28 01:07:32,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:32,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:32,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:32,757 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:32,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-06-28 01:07:32,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-28 01:07:32,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:32,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-28 01:07:32,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:32,970 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 [2024-06-28 01:07:33,163 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:07:33,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-06-28 01:07:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:07:33,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:33,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:33,388 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 168 treesize of output 164 [2024-06-28 01:07:33,427 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:07:33,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2024-06-28 01:07:33,469 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-06-28 01:07:33,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 199 treesize of output 194 [2024-06-28 01:07:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:33,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706055460] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:33,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:33,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-06-28 01:07:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285566593] [2024-06-28 01:07:33,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:33,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-06-28 01:07:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-06-28 01:07:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-06-28 01:07:33,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:33,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 360 transitions, 5861 flow. Second operand has 27 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 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) [2024-06-28 01:07:33,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:33,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:33,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:35,280 INFO L124 PetriNetUnfolderBase]: 2948/5283 cut-off events. [2024-06-28 01:07:35,280 INFO L125 PetriNetUnfolderBase]: For 70063/70066 co-relation queries the response was YES. [2024-06-28 01:07:35,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32262 conditions, 5283 events. 2948/5283 cut-off events. For 70063/70066 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 35286 event pairs, 813 based on Foata normal form. 10/5291 useless extension candidates. Maximal degree in co-relation 32181. Up to 4790 conditions per place. [2024-06-28 01:07:35,333 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 354 selfloop transitions, 35 changer transitions 29/423 dead transitions. [2024-06-28 01:07:35,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 423 transitions, 7192 flow [2024-06-28 01:07:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:07:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:07:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 227 transitions. [2024-06-28 01:07:35,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40463458110516937 [2024-06-28 01:07:35,335 INFO L175 Difference]: Start difference. First operand has 261 places, 360 transitions, 5861 flow. Second operand 17 states and 227 transitions. [2024-06-28 01:07:35,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 423 transitions, 7192 flow [2024-06-28 01:07:35,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 423 transitions, 6862 flow, removed 141 selfloop flow, removed 9 redundant places. [2024-06-28 01:07:35,697 INFO L231 Difference]: Finished difference. Result has 272 places, 358 transitions, 5681 flow [2024-06-28 01:07:35,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5681, PETRI_PLACES=272, PETRI_TRANSITIONS=358} [2024-06-28 01:07:35,697 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 241 predicate places. [2024-06-28 01:07:35,697 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 358 transitions, 5681 flow [2024-06-28 01:07:35,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.333333333333334) internal successors, (252), 27 states have internal predecessors, (252), 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) [2024-06-28 01:07:35,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:35,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:35,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-06-28 01:07:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-06-28 01:07:35,898 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:35,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -908083548, now seen corresponding path program 10 times [2024-06-28 01:07:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191132022] [2024-06-28 01:07:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191132022] [2024-06-28 01:07:36,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191132022] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127175566] [2024-06-28 01:07:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:07:36,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:36,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:36,273 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:36,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-06-28 01:07:36,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:07:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:36,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:07:36,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:36,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:36,509 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 37 treesize of output 25 [2024-06-28 01:07:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:36,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:36,624 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:36,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127175566] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:36,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-06-28 01:07:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813537967] [2024-06-28 01:07:36,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:07:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:07:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:07:36,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:36,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 358 transitions, 5681 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2024-06-28 01:07:36,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:36,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:36,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:38,131 INFO L124 PetriNetUnfolderBase]: 3007/5383 cut-off events. [2024-06-28 01:07:38,131 INFO L125 PetriNetUnfolderBase]: For 65561/65564 co-relation queries the response was YES. [2024-06-28 01:07:38,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31827 conditions, 5383 events. 3007/5383 cut-off events. For 65561/65564 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 36149 event pairs, 667 based on Foata normal form. 30/5411 useless extension candidates. Maximal degree in co-relation 31741. Up to 4252 conditions per place. [2024-06-28 01:07:38,185 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 360 selfloop transitions, 72 changer transitions 3/440 dead transitions. [2024-06-28 01:07:38,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 440 transitions, 7267 flow [2024-06-28 01:07:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-28 01:07:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-28 01:07:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 250 transitions. [2024-06-28 01:07:38,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2024-06-28 01:07:38,186 INFO L175 Difference]: Start difference. First operand has 272 places, 358 transitions, 5681 flow. Second operand 18 states and 250 transitions. [2024-06-28 01:07:38,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 440 transitions, 7267 flow [2024-06-28 01:07:38,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 440 transitions, 7124 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-28 01:07:38,517 INFO L231 Difference]: Finished difference. Result has 276 places, 372 transitions, 6021 flow [2024-06-28 01:07:38,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6021, PETRI_PLACES=276, PETRI_TRANSITIONS=372} [2024-06-28 01:07:38,518 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2024-06-28 01:07:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 372 transitions, 6021 flow [2024-06-28 01:07:38,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2024-06-28 01:07:38,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:38,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:38,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-06-28 01:07:38,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-06-28 01:07:38,719 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:38,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash -258575294, now seen corresponding path program 11 times [2024-06-28 01:07:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:38,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677925052] [2024-06-28 01:07:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:39,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677925052] [2024-06-28 01:07:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677925052] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784296839] [2024-06-28 01:07:39,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:07:39,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:39,104 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:39,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-06-28 01:07:39,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-28 01:07:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:39,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2024-06-28 01:07:39,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:39,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:39,354 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 33 treesize of output 25 [2024-06-28 01:07:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:39,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:39,424 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:39,424 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 40 treesize of output 56 [2024-06-28 01:07:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:07:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784296839] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:39,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-06-28 01:07:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962390218] [2024-06-28 01:07:39,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:39,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:07:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:07:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:07:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:39,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 372 transitions, 6021 flow. Second operand has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 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) [2024-06-28 01:07:39,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:39,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:39,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:40,933 INFO L124 PetriNetUnfolderBase]: 3314/5992 cut-off events. [2024-06-28 01:07:40,933 INFO L125 PetriNetUnfolderBase]: For 81759/81759 co-relation queries the response was YES. [2024-06-28 01:07:40,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35653 conditions, 5992 events. 3314/5992 cut-off events. For 81759/81759 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41618 event pairs, 785 based on Foata normal form. 42/6033 useless extension candidates. Maximal degree in co-relation 35566. Up to 4485 conditions per place. [2024-06-28 01:07:40,997 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 382 selfloop transitions, 93 changer transitions 6/486 dead transitions. [2024-06-28 01:07:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 486 transitions, 7975 flow [2024-06-28 01:07:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-06-28 01:07:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-06-28 01:07:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 313 transitions. [2024-06-28 01:07:40,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43112947658402206 [2024-06-28 01:07:40,999 INFO L175 Difference]: Start difference. First operand has 276 places, 372 transitions, 6021 flow. Second operand 22 states and 313 transitions. [2024-06-28 01:07:40,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 486 transitions, 7975 flow [2024-06-28 01:07:41,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 486 transitions, 7770 flow, removed 50 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:41,352 INFO L231 Difference]: Finished difference. Result has 291 places, 405 transitions, 6758 flow [2024-06-28 01:07:41,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6758, PETRI_PLACES=291, PETRI_TRANSITIONS=405} [2024-06-28 01:07:41,353 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 260 predicate places. [2024-06-28 01:07:41,353 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 405 transitions, 6758 flow [2024-06-28 01:07:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.80952380952381) internal successors, (206), 21 states have internal predecessors, (206), 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) [2024-06-28 01:07:41,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:41,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:41,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:41,554 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:41,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash 802196074, now seen corresponding path program 9 times [2024-06-28 01:07:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:41,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968244947] [2024-06-28 01:07:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:41,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968244947] [2024-06-28 01:07:41,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968244947] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:41,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600328253] [2024-06-28 01:07:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:07:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:41,889 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:41,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-06-28 01:07:42,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-06-28 01:07:42,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:42,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2024-06-28 01:07:42,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:42,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-06-28 01:07:42,056 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 [2024-06-28 01:07:42,083 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-06-28 01:07:42,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-06-28 01:07:42,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-28 01:07:42,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-06-28 01:07:42,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2024-06-28 01:07:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 01:07:42,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:42,614 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-06-28 01:07:42,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-06-28 01:07:42,676 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~i_AB~0 4)) (.cse0 (* c_~i_BA~0 4))) (let ((.cse5 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse10 (not (= c_~i_BA~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|))) (.cse2 (+ c_~A~0.offset .cse0 4)) (.cse6 (+ c_~A~0.offset 4 .cse4))) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (let ((.cse3 (select .cse1 .cse6))) (or (not (= (select v_arrayElimArr_2 (+ .cse0 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse1 .cse2))) (= .cse3 (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))) (= .cse3 (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (let ((.cse9 (select .cse7 .cse6)) (.cse8 (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (not (= (select .cse7 .cse2) .cse8)) (= .cse9 (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))) (= .cse9 .cse8))))) .cse10) (or (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) (and (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (or (not (= (select .cse11 .cse2) (select v_arrayElimArr_2 (+ .cse5 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select .cse11 .cse6) (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4)))))) .cse10) (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_2 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_2) c_~A~0.base))) (or (not (= (select v_arrayElimArr_2 (+ .cse0 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse12 .cse2))) (= (select .cse12 .cse6) (select v_arrayElimArr_2 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))))))))))) is different from false [2024-06-28 01:07:42,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:42,858 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2024-06-28 01:07:42,866 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:07:42,867 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 133 treesize of output 109 [2024-06-28 01:07:42,944 INFO L349 Elim1Store]: treesize reduction 16, result has 84.8 percent of original size [2024-06-28 01:07:42,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 137 [2024-06-28 01:07:43,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:43,165 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-06-28 01:07:43,172 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-28 01:07:43,173 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 82 treesize of output 67 [2024-06-28 01:07:43,207 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-28 01:07:43,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 67 treesize of output 74 [2024-06-28 01:07:43,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:43,258 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-06-28 01:07:43,265 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:07:43,266 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 94 treesize of output 79 [2024-06-28 01:07:43,299 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-06-28 01:07:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2024-06-28 01:07:43,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:43,348 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2024-06-28 01:07:43,355 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-06-28 01:07:43,356 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 121 treesize of output 100 [2024-06-28 01:07:43,394 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-06-28 01:07:43,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 97 treesize of output 89 [2024-06-28 01:07:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2024-06-28 01:07:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600328253] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:43,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:43,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-06-28 01:07:43,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138910480] [2024-06-28 01:07:43,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-06-28 01:07:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-06-28 01:07:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=826, Unknown=2, NotChecked=60, Total=1056 [2024-06-28 01:07:43,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2024-06-28 01:07:43,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 405 transitions, 6758 flow. Second operand has 33 states, 33 states have (on average 8.06060606060606) internal successors, (266), 33 states have internal predecessors, (266), 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) [2024-06-28 01:07:43,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:43,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2024-06-28 01:07:43,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:45,982 INFO L124 PetriNetUnfolderBase]: 5551/9448 cut-off events. [2024-06-28 01:07:45,982 INFO L125 PetriNetUnfolderBase]: For 123349/123352 co-relation queries the response was YES. [2024-06-28 01:07:46,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56130 conditions, 9448 events. 5551/9448 cut-off events. For 123349/123352 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 65023 event pairs, 1214 based on Foata normal form. 38/9484 useless extension candidates. Maximal degree in co-relation 56037. Up to 8144 conditions per place. [2024-06-28 01:07:46,074 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 443 selfloop transitions, 49 changer transitions 1/497 dead transitions. [2024-06-28 01:07:46,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 497 transitions, 8711 flow [2024-06-28 01:07:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:07:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:07:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 256 transitions. [2024-06-28 01:07:46,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082934609250399 [2024-06-28 01:07:46,076 INFO L175 Difference]: Start difference. First operand has 291 places, 405 transitions, 6758 flow. Second operand 19 states and 256 transitions. [2024-06-28 01:07:46,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 497 transitions, 8711 flow [2024-06-28 01:07:46,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 497 transitions, 8355 flow, removed 143 selfloop flow, removed 11 redundant places. [2024-06-28 01:07:46,818 INFO L231 Difference]: Finished difference. Result has 302 places, 409 transitions, 6661 flow [2024-06-28 01:07:46,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6661, PETRI_PLACES=302, PETRI_TRANSITIONS=409} [2024-06-28 01:07:46,818 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 271 predicate places. [2024-06-28 01:07:46,818 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 409 transitions, 6661 flow [2024-06-28 01:07:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.06060606060606) internal successors, (266), 33 states have internal predecessors, (266), 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) [2024-06-28 01:07:46,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:46,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:46,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-06-28 01:07:47,019 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:47,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1558504896, now seen corresponding path program 12 times [2024-06-28 01:07:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307376053] [2024-06-28 01:07:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:47,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:47,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307376053] [2024-06-28 01:07:47,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307376053] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:47,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227775098] [2024-06-28 01:07:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:07:47,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:47,364 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:47,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-06-28 01:07:47,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-06-28 01:07:47,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:47,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-28 01:07:47,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:47,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:47,674 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 29 treesize of output 21 [2024-06-28 01:07:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:47,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:47,765 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:47,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:47,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227775098] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:47,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:47,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-06-28 01:07:47,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193468313] [2024-06-28 01:07:47,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:47,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-28 01:07:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:47,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-28 01:07:47,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-06-28 01:07:47,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:47,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 409 transitions, 6661 flow. Second operand has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:07:47,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:47,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:47,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:49,487 INFO L124 PetriNetUnfolderBase]: 3393/6128 cut-off events. [2024-06-28 01:07:49,488 INFO L125 PetriNetUnfolderBase]: For 78304/78307 co-relation queries the response was YES. [2024-06-28 01:07:49,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36851 conditions, 6128 events. 3393/6128 cut-off events. For 78304/78307 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 42564 event pairs, 839 based on Foata normal form. 14/6140 useless extension candidates. Maximal degree in co-relation 36754. Up to 5020 conditions per place. [2024-06-28 01:07:49,555 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 388 selfloop transitions, 79 changer transitions 8/480 dead transitions. [2024-06-28 01:07:49,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 480 transitions, 7988 flow [2024-06-28 01:07:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:07:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:07:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2024-06-28 01:07:49,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-28 01:07:49,557 INFO L175 Difference]: Start difference. First operand has 302 places, 409 transitions, 6661 flow. Second operand 20 states and 273 transitions. [2024-06-28 01:07:49,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 480 transitions, 7988 flow [2024-06-28 01:07:49,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 480 transitions, 7809 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-06-28 01:07:49,941 INFO L231 Difference]: Finished difference. Result has 309 places, 409 transitions, 6663 flow [2024-06-28 01:07:49,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6663, PETRI_PLACES=309, PETRI_TRANSITIONS=409} [2024-06-28 01:07:49,942 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 278 predicate places. [2024-06-28 01:07:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 409 transitions, 6663 flow [2024-06-28 01:07:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.636363636363637) internal successors, (212), 22 states have internal predecessors, (212), 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) [2024-06-28 01:07:49,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:49,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:49,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-06-28 01:07:50,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-06-28 01:07:50,153 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:50,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1231458002, now seen corresponding path program 13 times [2024-06-28 01:07:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:50,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160080947] [2024-06-28 01:07:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:50,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160080947] [2024-06-28 01:07:50,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160080947] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:50,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598394329] [2024-06-28 01:07:50,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:07:50,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:50,447 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-06-28 01:07:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:50,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:07:50,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:50,694 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-06-28 01:07:50,694 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 34 treesize of output 10 [2024-06-28 01:07:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:50,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:50,768 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:50,768 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 40 treesize of output 56 [2024-06-28 01:07:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:07:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598394329] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:50,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:50,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-28 01:07:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385912479] [2024-06-28 01:07:50,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:50,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:07:50,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:07:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:07:50,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:50,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 409 transitions, 6663 flow. Second operand has 20 states, 20 states have (on average 9.95) internal successors, (199), 20 states have internal predecessors, (199), 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) [2024-06-28 01:07:50,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:50,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:50,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:52,398 INFO L124 PetriNetUnfolderBase]: 3345/6016 cut-off events. [2024-06-28 01:07:52,399 INFO L125 PetriNetUnfolderBase]: For 81692/81692 co-relation queries the response was YES. [2024-06-28 01:07:52,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36161 conditions, 6016 events. 3345/6016 cut-off events. For 81692/81692 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41151 event pairs, 624 based on Foata normal form. 62/6077 useless extension candidates. Maximal degree in co-relation 36063. Up to 4200 conditions per place. [2024-06-28 01:07:52,455 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 393 selfloop transitions, 106 changer transitions 5/509 dead transitions. [2024-06-28 01:07:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 509 transitions, 8586 flow [2024-06-28 01:07:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-06-28 01:07:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-06-28 01:07:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 295 transitions. [2024-06-28 01:07:52,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 01:07:52,456 INFO L175 Difference]: Start difference. First operand has 309 places, 409 transitions, 6663 flow. Second operand 20 states and 295 transitions. [2024-06-28 01:07:52,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 509 transitions, 8586 flow [2024-06-28 01:07:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 509 transitions, 8380 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-06-28 01:07:52,805 INFO L231 Difference]: Finished difference. Result has 312 places, 413 transitions, 6812 flow [2024-06-28 01:07:52,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6812, PETRI_PLACES=312, PETRI_TRANSITIONS=413} [2024-06-28 01:07:52,805 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 281 predicate places. [2024-06-28 01:07:52,806 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 413 transitions, 6812 flow [2024-06-28 01:07:52,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.95) internal successors, (199), 20 states have internal predecessors, (199), 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) [2024-06-28 01:07:52,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:52,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:52,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:53,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:53,022 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:53,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 74774846, now seen corresponding path program 10 times [2024-06-28 01:07:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174360153] [2024-06-28 01:07:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174360153] [2024-06-28 01:07:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174360153] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133006651] [2024-06-28 01:07:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:07:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:53,358 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:53,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-06-28 01:07:53,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:07:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:53,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2024-06-28 01:07:53,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:53,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:53,612 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 33 treesize of output 25 [2024-06-28 01:07:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:53,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:53,726 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:07:53,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:07:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:07:53,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133006651] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:53,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 18 [2024-06-28 01:07:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554871160] [2024-06-28 01:07:53,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:53,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-06-28 01:07:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-06-28 01:07:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-06-28 01:07:53,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:53,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 413 transitions, 6812 flow. Second operand has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 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) [2024-06-28 01:07:53,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:53,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:55,530 INFO L124 PetriNetUnfolderBase]: 3667/6594 cut-off events. [2024-06-28 01:07:55,530 INFO L125 PetriNetUnfolderBase]: For 82663/82666 co-relation queries the response was YES. [2024-06-28 01:07:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39737 conditions, 6594 events. 3667/6594 cut-off events. For 82663/82666 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 46206 event pairs, 823 based on Foata normal form. 17/6609 useless extension candidates. Maximal degree in co-relation 39636. Up to 5200 conditions per place. [2024-06-28 01:07:55,597 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 425 selfloop transitions, 98 changer transitions 13/541 dead transitions. [2024-06-28 01:07:55,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 541 transitions, 8933 flow [2024-06-28 01:07:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-06-28 01:07:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-06-28 01:07:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 369 transitions. [2024-06-28 01:07:55,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-28 01:07:55,598 INFO L175 Difference]: Start difference. First operand has 312 places, 413 transitions, 6812 flow. Second operand 28 states and 369 transitions. [2024-06-28 01:07:55,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 541 transitions, 8933 flow [2024-06-28 01:07:56,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 541 transitions, 8630 flow, removed 46 selfloop flow, removed 17 redundant places. [2024-06-28 01:07:56,037 INFO L231 Difference]: Finished difference. Result has 328 places, 441 transitions, 7350 flow [2024-06-28 01:07:56,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6524, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7350, PETRI_PLACES=328, PETRI_TRANSITIONS=441} [2024-06-28 01:07:56,038 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 297 predicate places. [2024-06-28 01:07:56,038 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 441 transitions, 7350 flow [2024-06-28 01:07:56,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.473684210526315) internal successors, (180), 19 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) [2024-06-28 01:07:56,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:56,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:56,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:56,256 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:56,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:56,257 INFO L85 PathProgramCache]: Analyzing trace with hash -222671814, now seen corresponding path program 14 times [2024-06-28 01:07:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:56,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200671317] [2024-06-28 01:07:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:56,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:56,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200671317] [2024-06-28 01:07:56,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200671317] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:56,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816817600] [2024-06-28 01:07:56,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:07:56,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:56,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:56,561 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:56,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-06-28 01:07:56,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:07:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:56,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:56,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:56,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:56,926 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 29 treesize of output 21 [2024-06-28 01:07:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:56,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:07:57,007 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:07:57,007 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 40 treesize of output 56 [2024-06-28 01:07:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:07:57,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816817600] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:07:57,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:07:57,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-28 01:07:57,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628987386] [2024-06-28 01:07:57,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:07:57,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:07:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:07:57,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:07:57,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:07:57,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:07:57,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 441 transitions, 7350 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:57,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:07:57,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:07:57,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:07:58,720 INFO L124 PetriNetUnfolderBase]: 3556/6354 cut-off events. [2024-06-28 01:07:58,720 INFO L125 PetriNetUnfolderBase]: For 84574/84574 co-relation queries the response was YES. [2024-06-28 01:07:58,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39264 conditions, 6354 events. 3556/6354 cut-off events. For 84574/84574 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43684 event pairs, 921 based on Foata normal form. 8/6361 useless extension candidates. Maximal degree in co-relation 39159. Up to 5236 conditions per place. [2024-06-28 01:07:58,781 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 398 selfloop transitions, 84 changer transitions 12/499 dead transitions. [2024-06-28 01:07:58,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 499 transitions, 8535 flow [2024-06-28 01:07:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-06-28 01:07:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-06-28 01:07:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 279 transitions. [2024-06-28 01:07:58,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-28 01:07:58,783 INFO L175 Difference]: Start difference. First operand has 328 places, 441 transitions, 7350 flow. Second operand 21 states and 279 transitions. [2024-06-28 01:07:58,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 499 transitions, 8535 flow [2024-06-28 01:07:59,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 499 transitions, 8226 flow, removed 96 selfloop flow, removed 15 redundant places. [2024-06-28 01:07:59,229 INFO L231 Difference]: Finished difference. Result has 331 places, 437 transitions, 7155 flow [2024-06-28 01:07:59,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7155, PETRI_PLACES=331, PETRI_TRANSITIONS=437} [2024-06-28 01:07:59,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 300 predicate places. [2024-06-28 01:07:59,229 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 437 transitions, 7155 flow [2024-06-28 01:07:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:07:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:07:59,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:07:59,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-06-28 01:07:59,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:59,431 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:07:59,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:07:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1776798444, now seen corresponding path program 11 times [2024-06-28 01:07:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:07:59,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349545002] [2024-06-28 01:07:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:07:59,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:07:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:07:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:07:59,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:07:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349545002] [2024-06-28 01:07:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349545002] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:07:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987672114] [2024-06-28 01:07:59,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:07:59,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:07:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:07:59,721 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:07:59,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-06-28 01:07:59,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-06-28 01:07:59,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:07:59,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:07:59,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:07:59,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:07:59,975 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 33 treesize of output 25 [2024-06-28 01:07:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:07:59,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:00,079 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:08:00,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:08:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:00,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987672114] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:00,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:00,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 20 [2024-06-28 01:08:00,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032096365] [2024-06-28 01:08:00,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:00,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:00,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:00,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:00,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:00,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 437 transitions, 7155 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:00,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:00,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:00,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:02,064 INFO L124 PetriNetUnfolderBase]: 3586/6385 cut-off events. [2024-06-28 01:08:02,064 INFO L125 PetriNetUnfolderBase]: For 86249/86252 co-relation queries the response was YES. [2024-06-28 01:08:02,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39468 conditions, 6385 events. 3586/6385 cut-off events. For 86249/86252 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43822 event pairs, 738 based on Foata normal form. 62/6445 useless extension candidates. Maximal degree in co-relation 39362. Up to 5022 conditions per place. [2024-06-28 01:08:02,137 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 441 selfloop transitions, 111 changer transitions 2/559 dead transitions. [2024-06-28 01:08:02,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 559 transitions, 9151 flow [2024-06-28 01:08:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-06-28 01:08:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-06-28 01:08:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 434 transitions. [2024-06-28 01:08:02,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3868092691622103 [2024-06-28 01:08:02,138 INFO L175 Difference]: Start difference. First operand has 331 places, 437 transitions, 7155 flow. Second operand 34 states and 434 transitions. [2024-06-28 01:08:02,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 559 transitions, 9151 flow [2024-06-28 01:08:02,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 559 transitions, 8924 flow, removed 8 selfloop flow, removed 22 redundant places. [2024-06-28 01:08:02,664 INFO L231 Difference]: Finished difference. Result has 342 places, 453 transitions, 7477 flow [2024-06-28 01:08:02,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6956, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=7477, PETRI_PLACES=342, PETRI_TRANSITIONS=453} [2024-06-28 01:08:02,665 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 311 predicate places. [2024-06-28 01:08:02,665 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 453 transitions, 7477 flow [2024-06-28 01:08:02,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:02,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:02,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:02,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-06-28 01:08:02,881 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:02,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1443492174, now seen corresponding path program 12 times [2024-06-28 01:08:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:02,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014677702] [2024-06-28 01:08:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:08:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014677702] [2024-06-28 01:08:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014677702] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716409805] [2024-06-28 01:08:03,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:08:03,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:03,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:03,232 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:03,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-06-28 01:08:03,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:08:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:03,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-28 01:08:03,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:03,631 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-06-28 01:08:03,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-06-28 01:08:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:03,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:03,744 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-06-28 01:08:03,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-06-28 01:08:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716409805] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:03,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-06-28 01:08:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011057890] [2024-06-28 01:08:03,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:03,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-06-28 01:08:03,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-06-28 01:08:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-06-28 01:08:03,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:03,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 453 transitions, 7477 flow. Second operand has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-06-28 01:08:03,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:03,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:03,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:05,841 INFO L124 PetriNetUnfolderBase]: 3875/6887 cut-off events. [2024-06-28 01:08:05,841 INFO L125 PetriNetUnfolderBase]: For 109904/109907 co-relation queries the response was YES. [2024-06-28 01:08:05,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44168 conditions, 6887 events. 3875/6887 cut-off events. For 109904/109907 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47535 event pairs, 768 based on Foata normal form. 92/6977 useless extension candidates. Maximal degree in co-relation 44062. Up to 4858 conditions per place. [2024-06-28 01:08:05,913 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 460 selfloop transitions, 151 changer transitions 6/622 dead transitions. [2024-06-28 01:08:05,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 622 transitions, 10649 flow [2024-06-28 01:08:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-06-28 01:08:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-06-28 01:08:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 494 transitions. [2024-06-28 01:08:05,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045864045864046 [2024-06-28 01:08:05,914 INFO L175 Difference]: Start difference. First operand has 342 places, 453 transitions, 7477 flow. Second operand 37 states and 494 transitions. [2024-06-28 01:08:05,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 622 transitions, 10649 flow [2024-06-28 01:08:06,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 622 transitions, 10328 flow, removed 23 selfloop flow, removed 25 redundant places. [2024-06-28 01:08:06,504 INFO L231 Difference]: Finished difference. Result has 359 places, 494 transitions, 8338 flow [2024-06-28 01:08:06,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8338, PETRI_PLACES=359, PETRI_TRANSITIONS=494} [2024-06-28 01:08:06,505 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 328 predicate places. [2024-06-28 01:08:06,505 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 494 transitions, 8338 flow [2024-06-28 01:08:06,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.73913043478261) internal successors, (224), 23 states have internal predecessors, (224), 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) [2024-06-28 01:08:06,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:06,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:06,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-06-28 01:08:06,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-06-28 01:08:06,707 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:06,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:06,707 INFO L85 PathProgramCache]: Analyzing trace with hash 624862460, now seen corresponding path program 13 times [2024-06-28 01:08:06,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:06,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789347629] [2024-06-28 01:08:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:08:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789347629] [2024-06-28 01:08:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789347629] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449973790] [2024-06-28 01:08:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-06-28 01:08:06,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:06,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:06,999 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:07,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-06-28 01:08:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:07,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-28 01:08:07,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:07,219 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-06-28 01:08:07,220 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 35 treesize of output 20 [2024-06-28 01:08:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:07,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:07,288 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:07,288 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 40 treesize of output 56 [2024-06-28 01:08:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:08:07,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449973790] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:07,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:07,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-06-28 01:08:07,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849285568] [2024-06-28 01:08:07,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-06-28 01:08:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-06-28 01:08:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-06-28 01:08:07,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:07,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 494 transitions, 8338 flow. Second operand has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 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) [2024-06-28 01:08:07,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:07,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:07,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:09,083 INFO L124 PetriNetUnfolderBase]: 3861/6870 cut-off events. [2024-06-28 01:08:09,083 INFO L125 PetriNetUnfolderBase]: For 114600/114600 co-relation queries the response was YES. [2024-06-28 01:08:09,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44819 conditions, 6870 events. 3861/6870 cut-off events. For 114600/114600 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 47575 event pairs, 976 based on Foata normal form. 10/6879 useless extension candidates. Maximal degree in co-relation 44705. Up to 6004 conditions per place. [2024-06-28 01:08:09,157 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 443 selfloop transitions, 80 changer transitions 14/542 dead transitions. [2024-06-28 01:08:09,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 542 transitions, 9633 flow [2024-06-28 01:08:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-28 01:08:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-28 01:08:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 226 transitions. [2024-06-28 01:08:09,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028520499108734 [2024-06-28 01:08:09,158 INFO L175 Difference]: Start difference. First operand has 359 places, 494 transitions, 8338 flow. Second operand 17 states and 226 transitions. [2024-06-28 01:08:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 542 transitions, 9633 flow [2024-06-28 01:08:09,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 542 transitions, 9207 flow, removed 121 selfloop flow, removed 20 redundant places. [2024-06-28 01:08:09,906 INFO L231 Difference]: Finished difference. Result has 357 places, 494 transitions, 8111 flow [2024-06-28 01:08:09,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7919, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8111, PETRI_PLACES=357, PETRI_TRANSITIONS=494} [2024-06-28 01:08:09,907 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 326 predicate places. [2024-06-28 01:08:09,907 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 494 transitions, 8111 flow [2024-06-28 01:08:09,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.15) internal successors, (203), 20 states have internal predecessors, (203), 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) [2024-06-28 01:08:09,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:09,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:09,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:10,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-06-28 01:08:10,112 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:10,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash -110354244, now seen corresponding path program 14 times [2024-06-28 01:08:10,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:10,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958482040] [2024-06-28 01:08:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:10,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:08:10,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958482040] [2024-06-28 01:08:10,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958482040] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025218243] [2024-06-28 01:08:10,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-28 01:08:10,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:10,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:10,457 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:10,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-06-28 01:08:10,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-28 01:08:10,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:10,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2024-06-28 01:08:10,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:10,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:08:10,758 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 29 treesize of output 21 [2024-06-28 01:08:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:10,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:10,837 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:10,837 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 40 treesize of output 56 [2024-06-28 01:08:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:08:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025218243] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:10,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-06-28 01:08:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239121081] [2024-06-28 01:08:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:10,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:10,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 494 transitions, 8111 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:10,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:10,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:10,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:12,734 INFO L124 PetriNetUnfolderBase]: 3903/6973 cut-off events. [2024-06-28 01:08:12,734 INFO L125 PetriNetUnfolderBase]: For 109531/109531 co-relation queries the response was YES. [2024-06-28 01:08:12,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44261 conditions, 6973 events. 3903/6973 cut-off events. For 109531/109531 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 48672 event pairs, 832 based on Foata normal form. 30/7002 useless extension candidates. Maximal degree in co-relation 44148. Up to 5679 conditions per place. [2024-06-28 01:08:12,811 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 475 selfloop transitions, 104 changer transitions 10/594 dead transitions. [2024-06-28 01:08:12,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 594 transitions, 10025 flow [2024-06-28 01:08:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-06-28 01:08:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-06-28 01:08:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 339 transitions. [2024-06-28 01:08:12,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109090909090909 [2024-06-28 01:08:12,813 INFO L175 Difference]: Start difference. First operand has 357 places, 494 transitions, 8111 flow. Second operand 25 states and 339 transitions. [2024-06-28 01:08:12,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 594 transitions, 10025 flow [2024-06-28 01:08:13,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 594 transitions, 9814 flow, removed 3 selfloop flow, removed 17 redundant places. [2024-06-28 01:08:13,418 INFO L231 Difference]: Finished difference. Result has 366 places, 506 transitions, 8467 flow [2024-06-28 01:08:13,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7860, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8467, PETRI_PLACES=366, PETRI_TRANSITIONS=506} [2024-06-28 01:08:13,418 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 335 predicate places. [2024-06-28 01:08:13,418 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 506 transitions, 8467 flow [2024-06-28 01:08:13,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:13,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:13,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:13,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:13,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-06-28 01:08:13,620 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:13,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:13,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2011973948, now seen corresponding path program 15 times [2024-06-28 01:08:13,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239213462] [2024-06-28 01:08:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:13,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-28 01:08:13,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239213462] [2024-06-28 01:08:13,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239213462] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:13,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256769405] [2024-06-28 01:08:13,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:08:13,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:13,920 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:13,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-06-28 01:08:14,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-28 01:08:14,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:14,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2024-06-28 01:08:14,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:14,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-28 01:08:14,199 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 29 treesize of output 21 [2024-06-28 01:08:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-06-28 01:08:14,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:14,269 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-06-28 01:08:14,270 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 40 treesize of output 56 [2024-06-28 01:08:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:08:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256769405] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:14,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:14,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-06-28 01:08:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645225738] [2024-06-28 01:08:14,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-28 01:08:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-28 01:08:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-06-28 01:08:14,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:14,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 506 transitions, 8467 flow. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:14,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:14,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:14,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:16,150 INFO L124 PetriNetUnfolderBase]: 3607/6391 cut-off events. [2024-06-28 01:08:16,150 INFO L125 PetriNetUnfolderBase]: For 105800/105800 co-relation queries the response was YES. [2024-06-28 01:08:16,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41268 conditions, 6391 events. 3607/6391 cut-off events. For 105800/105800 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43344 event pairs, 836 based on Foata normal form. 60/6450 useless extension candidates. Maximal degree in co-relation 41156. Up to 5679 conditions per place. [2024-06-28 01:08:16,207 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 444 selfloop transitions, 91 changer transitions 2/542 dead transitions. [2024-06-28 01:08:16,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 542 transitions, 9561 flow [2024-06-28 01:08:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-06-28 01:08:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-06-28 01:08:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 245 transitions. [2024-06-28 01:08:16,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39074960127591707 [2024-06-28 01:08:16,208 INFO L175 Difference]: Start difference. First operand has 366 places, 506 transitions, 8467 flow. Second operand 19 states and 245 transitions. [2024-06-28 01:08:16,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 542 transitions, 9561 flow [2024-06-28 01:08:16,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 542 transitions, 9233 flow, removed 66 selfloop flow, removed 23 redundant places. [2024-06-28 01:08:16,887 INFO L231 Difference]: Finished difference. Result has 356 places, 495 transitions, 8090 flow [2024-06-28 01:08:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8090, PETRI_PLACES=356, PETRI_TRANSITIONS=495} [2024-06-28 01:08:16,888 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-06-28 01:08:16,888 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 495 transitions, 8090 flow [2024-06-28 01:08:16,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 21 states have internal predecessors, (205), 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) [2024-06-28 01:08:16,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:16,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:16,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-06-28 01:08:17,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:17,089 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:17,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:17,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1578667959, now seen corresponding path program 9 times [2024-06-28 01:08:17,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:17,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528032308] [2024-06-28 01:08:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:17,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:08:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528032308] [2024-06-28 01:08:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528032308] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338376185] [2024-06-28 01:08:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-28 01:08:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:17,156 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:17,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-06-28 01:08:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-06-28 01:08:17,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:17,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2024-06-28 01:08:17,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:08:17,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-28 01:08:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338376185] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:18,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 14] total 30 [2024-06-28 01:08:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968625734] [2024-06-28 01:08:18,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-06-28 01:08:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-06-28 01:08:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2024-06-28 01:08:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:18,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 495 transitions, 8090 flow. Second operand has 31 states, 31 states have (on average 9.451612903225806) internal successors, (293), 31 states have internal predecessors, (293), 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) [2024-06-28 01:08:18,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:18,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:18,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:21,461 INFO L124 PetriNetUnfolderBase]: 7424/13439 cut-off events. [2024-06-28 01:08:21,461 INFO L125 PetriNetUnfolderBase]: For 266413/266418 co-relation queries the response was YES. [2024-06-28 01:08:21,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88889 conditions, 13439 events. 7424/13439 cut-off events. For 266413/266418 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 104000 event pairs, 688 based on Foata normal form. 342/13779 useless extension candidates. Maximal degree in co-relation 88785. Up to 4022 conditions per place. [2024-06-28 01:08:21,613 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 452 selfloop transitions, 576 changer transitions 51/1084 dead transitions. [2024-06-28 01:08:21,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1084 transitions, 19036 flow [2024-06-28 01:08:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-06-28 01:08:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-06-28 01:08:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 520 transitions. [2024-06-28 01:08:21,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-28 01:08:21,615 INFO L175 Difference]: Start difference. First operand has 356 places, 495 transitions, 8090 flow. Second operand 35 states and 520 transitions. [2024-06-28 01:08:21,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1084 transitions, 19036 flow [2024-06-28 01:08:23,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1084 transitions, 18668 flow, removed 12 selfloop flow, removed 19 redundant places. [2024-06-28 01:08:23,363 INFO L231 Difference]: Finished difference. Result has 390 places, 816 transitions, 16195 flow [2024-06-28 01:08:23,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16195, PETRI_PLACES=390, PETRI_TRANSITIONS=816} [2024-06-28 01:08:23,364 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 359 predicate places. [2024-06-28 01:08:23,364 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 816 transitions, 16195 flow [2024-06-28 01:08:23,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.451612903225806) internal successors, (293), 31 states have internal predecessors, (293), 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) [2024-06-28 01:08:23,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:23,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:23,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-06-28 01:08:23,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-06-28 01:08:23,565 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:23,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:23,565 INFO L85 PathProgramCache]: Analyzing trace with hash -417844537, now seen corresponding path program 10 times [2024-06-28 01:08:23,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:23,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330206668] [2024-06-28 01:08:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:23,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:23,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330206668] [2024-06-28 01:08:23,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330206668] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:23,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783769744] [2024-06-28 01:08:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-28 01:08:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:23,623 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-06-28 01:08:23,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-28 01:08:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:23,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-28 01:08:23,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-28 01:08:23,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-06-28 01:08:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783769744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 01:08:23,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-06-28 01:08:23,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2024-06-28 01:08:23,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895854533] [2024-06-28 01:08:23,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 01:08:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 01:08:23,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 01:08:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 01:08:23,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 33 [2024-06-28 01:08:23,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 816 transitions, 16195 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 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) [2024-06-28 01:08:23,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:23,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 33 [2024-06-28 01:08:23,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:28,763 INFO L124 PetriNetUnfolderBase]: 8713/15915 cut-off events. [2024-06-28 01:08:28,763 INFO L125 PetriNetUnfolderBase]: For 405158/405158 co-relation queries the response was YES. [2024-06-28 01:08:28,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119851 conditions, 15915 events. 8713/15915 cut-off events. For 405158/405158 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 127588 event pairs, 1169 based on Foata normal form. 28/15941 useless extension candidates. Maximal degree in co-relation 119728. Up to 7499 conditions per place. [2024-06-28 01:08:28,936 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 518 selfloop transitions, 608 changer transitions 33/1164 dead transitions. [2024-06-28 01:08:28,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1164 transitions, 25193 flow [2024-06-28 01:08:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:08:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:08:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 01:08:28,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-06-28 01:08:28,937 INFO L175 Difference]: Start difference. First operand has 390 places, 816 transitions, 16195 flow. Second operand 10 states and 178 transitions. [2024-06-28 01:08:28,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1164 transitions, 25193 flow [2024-06-28 01:08:32,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1164 transitions, 23961 flow, removed 571 selfloop flow, removed 9 redundant places. [2024-06-28 01:08:32,212 INFO L231 Difference]: Finished difference. Result has 392 places, 1024 transitions, 21614 flow [2024-06-28 01:08:32,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=15418, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21614, PETRI_PLACES=392, PETRI_TRANSITIONS=1024} [2024-06-28 01:08:32,213 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 361 predicate places. [2024-06-28 01:08:32,213 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1024 transitions, 21614 flow [2024-06-28 01:08:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 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) [2024-06-28 01:08:32,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:32,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:32,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-06-28 01:08:32,414 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:32,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:32,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1644671201, now seen corresponding path program 11 times [2024-06-28 01:08:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993318493] [2024-06-28 01:08:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:32,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-28 01:08:32,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:32,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993318493] [2024-06-28 01:08:32,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993318493] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:32,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013375405] [2024-06-28 01:08:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-28 01:08:32,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:32,487 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-06-28 01:08:32,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-06-28 01:08:32,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:32,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 01:08:32,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:32,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-28 01:08:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013375405] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:32,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2024-06-28 01:08:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139070419] [2024-06-28 01:08:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:08:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:08:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:08:32,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:32,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1024 transitions, 21614 flow. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 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) [2024-06-28 01:08:32,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:32,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:32,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:39,232 INFO L124 PetriNetUnfolderBase]: 9842/17933 cut-off events. [2024-06-28 01:08:39,232 INFO L125 PetriNetUnfolderBase]: For 519714/519720 co-relation queries the response was YES. [2024-06-28 01:08:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143413 conditions, 17933 events. 9842/17933 cut-off events. For 519714/519720 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 148057 event pairs, 2138 based on Foata normal form. 28/17957 useless extension candidates. Maximal degree in co-relation 143288. Up to 12310 conditions per place. [2024-06-28 01:08:39,467 INFO L140 encePairwiseOnDemand]: 29/33 looper letters, 843 selfloop transitions, 348 changer transitions 4/1200 dead transitions. [2024-06-28 01:08:39,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1200 transitions, 27695 flow [2024-06-28 01:08:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 01:08:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 01:08:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-28 01:08:39,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-06-28 01:08:39,468 INFO L175 Difference]: Start difference. First operand has 392 places, 1024 transitions, 21614 flow. Second operand 10 states and 178 transitions. [2024-06-28 01:08:39,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1200 transitions, 27695 flow [2024-06-28 01:08:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1200 transitions, 27132 flow, removed 273 selfloop flow, removed 3 redundant places. [2024-06-28 01:08:44,346 INFO L231 Difference]: Finished difference. Result has 402 places, 1097 transitions, 24297 flow [2024-06-28 01:08:44,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=21209, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24297, PETRI_PLACES=402, PETRI_TRANSITIONS=1097} [2024-06-28 01:08:44,347 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 371 predicate places. [2024-06-28 01:08:44,348 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1097 transitions, 24297 flow [2024-06-28 01:08:44,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 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) [2024-06-28 01:08:44,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 01:08:44,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 01:08:44,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-06-28 01:08:44,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-06-28 01:08:44,548 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-28 01:08:44,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 01:08:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 196108927, now seen corresponding path program 12 times [2024-06-28 01:08:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 01:08:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104487828] [2024-06-28 01:08:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 01:08:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 01:08:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 01:08:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:44,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 01:08:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104487828] [2024-06-28 01:08:44,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104487828] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-28 01:08:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312430287] [2024-06-28 01:08:44,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-28 01:08:44,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-28 01:08:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 01:08:44,627 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-28 01:08:44,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-06-28 01:08:44,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-06-28 01:08:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-28 01:08:44,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2024-06-28 01:08:44,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-28 01:08:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-06-28 01:08:44,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-28 01:08:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-06-28 01:08:44,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312430287] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-28 01:08:44,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-28 01:08:44,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2024-06-28 01:08:44,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164949558] [2024-06-28 01:08:44,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-28 01:08:44,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 01:08:44,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 01:08:44,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 01:08:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 01:08:44,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2024-06-28 01:08:44,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1097 transitions, 24297 flow. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 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) [2024-06-28 01:08:44,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 01:08:44,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2024-06-28 01:08:44,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 01:08:53,342 INFO L124 PetriNetUnfolderBase]: 11854/21594 cut-off events. [2024-06-28 01:08:53,342 INFO L125 PetriNetUnfolderBase]: For 677039/677045 co-relation queries the response was YES.