./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:54:51,359 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:54:51,449 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:54:51,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:54:51,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:54:51,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:54:51,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:54:51,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:54:51,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:54:51,491 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:54:51,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:54:51,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:54:51,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:54:51,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:54:51,493 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:54:51,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:54:51,494 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:54:51,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:54:51,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:54:51,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:54:51,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:54:51,496 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:54:51,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:54:51,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:54:51,497 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:54:51,497 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:54:51,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:54:51,498 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:54:51,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:54:51,498 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:54:51,508 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:54:51,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:54:51,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:54:51,509 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:54:51,509 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:54:51,509 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:54:51,509 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:54:51,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:54:51,510 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:54:51,510 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:54:51,510 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:54:51,510 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:54:51,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:54:51,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-01-27 15:54:51,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:54:51,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:54:51,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:54:51,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:54:51,758 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:54:51,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-01-27 15:54:52,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:54:53,133 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:54:53,134 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2024-01-27 15:54:53,141 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca175024/fa6ca058eb12471f888e0cf3d2f27319/FLAG42b1208d3 [2024-01-27 15:54:53,151 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bca175024/fa6ca058eb12471f888e0cf3d2f27319 [2024-01-27 15:54:53,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:54:53,154 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:54:53,155 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:54:53,155 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:54:53,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:54:53,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1294c3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53, skipping insertion in model container [2024-01-27 15:54:53,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:54:53,338 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2024-01-27 15:54:53,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:54:53,366 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:54:53,409 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c[2459,2472] [2024-01-27 15:54:53,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:54:53,431 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:54:53,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53 WrapperNode [2024-01-27 15:54:53,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:54:53,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:54:53,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:54:53,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:54:53,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,461 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,483 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2024-01-27 15:54:53,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:54:53,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:54:53,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:54:53,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:54:53,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,496 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,498 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,515 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:54:53,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,527 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,530 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:54:53,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:54:53,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:54:53,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:54:53,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (1/1) ... [2024-01-27 15:54:53,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:54:53,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:53,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:54:53,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:54:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:54:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:54:53,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:54:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:54:53,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:54:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:54:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:54:53,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:54:53,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:54:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:54:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:54:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:54:53,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:54:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:54:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:54:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:54:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:54:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:54:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:54:53,620 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:54:53,717 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:54:53,719 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:54:53,918 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:54:53,918 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:54:54,110 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:54:54,110 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:54:54,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:54:54 BoogieIcfgContainer [2024-01-27 15:54:54,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:54:54,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:54:54,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:54:54,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:54:54,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:54:53" (1/3) ... [2024-01-27 15:54:54,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c481da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:54:54, skipping insertion in model container [2024-01-27 15:54:54,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:54:53" (2/3) ... [2024-01-27 15:54:54,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c481da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:54:54, skipping insertion in model container [2024-01-27 15:54:54,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:54:54" (3/3) ... [2024-01-27 15:54:54,125 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-01-27 15:54:54,133 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:54:54,142 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:54:54,142 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:54:54,143 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:54:54,186 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:54:54,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2024-01-27 15:54:54,251 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2024-01-27 15:54:54,251 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:54:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-01-27 15:54:54,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2024-01-27 15:54:54,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2024-01-27 15:54:54,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:54:54,283 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=true, 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;@4ce7fc0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:54:54,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:54:54,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:54:54,294 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2024-01-27 15:54:54,294 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:54:54,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:54,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:54,295 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1474316529, now seen corresponding path program 1 times [2024-01-27 15:54:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:54,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636186382] [2024-01-27 15:54:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:54,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:54,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636186382] [2024-01-27 15:54:54,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636186382] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:54,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:54,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:54:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591087535] [2024-01-27 15:54:54,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:54,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:54:54,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:54:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:54:54,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:54,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:54,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:54,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:54,777 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2024-01-27 15:54:54,777 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-27 15:54:54,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2024-01-27 15:54:54,784 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-01-27 15:54:54,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2024-01-27 15:54:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:54:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:54:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-01-27 15:54:54,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-01-27 15:54:54,800 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2024-01-27 15:54:54,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2024-01-27 15:54:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:54:54,806 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2024-01-27 15:54:54,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2024-01-27 15:54:54,812 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2024-01-27 15:54:54,813 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2024-01-27 15:54:54,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:54,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:54,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:54,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:54:54,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:54,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1351442730, now seen corresponding path program 1 times [2024-01-27 15:54:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388216946] [2024-01-27 15:54:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:54,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388216946] [2024-01-27 15:54:54,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388216946] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:54,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:54,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:54:54,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69048027] [2024-01-27 15:54:54,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:54:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:54:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:54:55,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:55,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:55,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:55,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:55,109 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2024-01-27 15:54:55,110 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 15:54:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1240 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2024-01-27 15:54:55,113 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-01-27 15:54:55,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2024-01-27 15:54:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:54:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:54:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-01-27 15:54:55,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-01-27 15:54:55,117 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-01-27 15:54:55,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2024-01-27 15:54:55,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:54:55,121 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2024-01-27 15:54:55,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2024-01-27 15:54:55,123 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2024-01-27 15:54:55,123 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2024-01-27 15:54:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:55,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:55,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:54:55,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:55,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash -959153222, now seen corresponding path program 1 times [2024-01-27 15:54:55,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:55,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540793217] [2024-01-27 15:54:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:55,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:55,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540793217] [2024-01-27 15:54:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540793217] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:55,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:54:55,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002163082] [2024-01-27 15:54:55,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:54:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:54:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:54:55,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:55,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:55,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:55,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:55,353 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2024-01-27 15:54:55,354 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-01-27 15:54:55,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1568 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2024-01-27 15:54:55,359 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2024-01-27 15:54:55,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2024-01-27 15:54:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:54:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:54:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-01-27 15:54:55,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-01-27 15:54:55,363 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2024-01-27 15:54:55,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2024-01-27 15:54:55,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:55,366 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2024-01-27 15:54:55,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-01-27 15:54:55,368 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2024-01-27 15:54:55,368 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2024-01-27 15:54:55,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:55,369 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] [2024-01-27 15:54:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:54:55,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:55,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash 171303639, now seen corresponding path program 1 times [2024-01-27 15:54:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707403076] [2024-01-27 15:54:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:55,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:55,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707403076] [2024-01-27 15:54:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707403076] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:54:55,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:54:55,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:54:55,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211587098] [2024-01-27 15:54:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:54:55,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:54:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:55,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:54:55,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:54:55,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:55,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:55,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:55,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:55,750 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2024-01-27 15:54:55,751 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-01-27 15:54:55,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2278 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2024-01-27 15:54:55,753 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2024-01-27 15:54:55,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2024-01-27 15:54:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:54:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:54:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-01-27 15:54:55,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-01-27 15:54:55,757 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2024-01-27 15:54:55,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2024-01-27 15:54:55,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:54:55,759 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2024-01-27 15:54:55,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-01-27 15:54:55,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2024-01-27 15:54:55,761 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2024-01-27 15:54:55,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:55,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:55,762 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] [2024-01-27 15:54:55,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:54:55,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:55,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -832023193, now seen corresponding path program 1 times [2024-01-27 15:54:55,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:55,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340675767] [2024-01-27 15:54:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:54:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340675767] [2024-01-27 15:54:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340675767] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594749837] [2024-01-27 15:54:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:56,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:56,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:56,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:54:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:56,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:54:56,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:54:56,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:56,351 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:56,352 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 11 [2024-01-27 15:54:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:54:56,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594749837] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:56,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:56,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-01-27 15:54:56,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810546425] [2024-01-27 15:54:56,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:56,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:54:56,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:56,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:54:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:54:56,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:56,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:56,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:56,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:56,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:56,526 INFO L124 PetriNetUnfolderBase]: 232/455 cut-off events. [2024-01-27 15:54:56,527 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-27 15:54:56,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 455 events. 232/455 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2030 event pairs, 45 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 974. Up to 113 conditions per place. [2024-01-27 15:54:56,529 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 39 selfloop transitions, 5 changer transitions 13/62 dead transitions. [2024-01-27 15:54:56,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 62 transitions, 283 flow [2024-01-27 15:54:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:54:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:54:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-01-27 15:54:56,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5689655172413793 [2024-01-27 15:54:56,531 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 6 states and 99 transitions. [2024-01-27 15:54:56,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 62 transitions, 283 flow [2024-01-27 15:54:56,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-27 15:54:56,533 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 100 flow [2024-01-27 15:54:56,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2024-01-27 15:54:56,534 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-01-27 15:54:56,534 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 100 flow [2024-01-27 15:54:56,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:56,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:56,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:56,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:56,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:56,758 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:56,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1783023759, now seen corresponding path program 2 times [2024-01-27 15:54:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:56,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244383424] [2024-01-27 15:54:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:54:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244383424] [2024-01-27 15:54:56,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244383424] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307585984] [2024-01-27 15:54:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:54:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:56,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:56,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:54:56,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:54:56,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:56,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:54:56,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:54:57,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:54:57,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307585984] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:57,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:57,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-01-27 15:54:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256497643] [2024-01-27 15:54:57,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:54:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:54:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:54:57,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:57,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:57,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:54:57,536 INFO L124 PetriNetUnfolderBase]: 657/1294 cut-off events. [2024-01-27 15:54:57,536 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2024-01-27 15:54:57,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2845 conditions, 1294 events. 657/1294 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7539 event pairs, 234 based on Foata normal form. 38/1094 useless extension candidates. Maximal degree in co-relation 2837. Up to 335 conditions per place. [2024-01-27 15:54:57,542 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 9 changer transitions 39/99 dead transitions. [2024-01-27 15:54:57,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 99 transitions, 492 flow [2024-01-27 15:54:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:54:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:54:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-01-27 15:54:57,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2024-01-27 15:54:57,546 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 100 flow. Second operand 9 states and 155 transitions. [2024-01-27 15:54:57,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 99 transitions, 492 flow [2024-01-27 15:54:57,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 99 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-01-27 15:54:57,552 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 172 flow [2024-01-27 15:54:57,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-01-27 15:54:57,554 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 18 predicate places. [2024-01-27 15:54:57,555 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 172 flow [2024-01-27 15:54:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:57,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:54:57,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:54:57,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:54:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:54:57,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:54:57,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:54:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash -23646222, now seen corresponding path program 3 times [2024-01-27 15:54:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:54:57,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670338601] [2024-01-27 15:54:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:54:57,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:54:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:54:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:54:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:54:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670338601] [2024-01-27 15:54:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670338601] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:54:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092223344] [2024-01-27 15:54:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:54:58,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:54:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:54:58,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:54:58,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:54:58,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:54:58,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:54:58,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-27 15:54:58,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:54:58,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 15:54:58,488 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:58,489 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 [2024-01-27 15:54:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:58,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:54:59,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-01-27 15:54:59,036 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:54:59,037 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 53 treesize of output 41 [2024-01-27 15:54:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:54:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092223344] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:54:59,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:54:59,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2024-01-27 15:54:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601626475] [2024-01-27 15:54:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:54:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:54:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:54:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:54:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:54:59,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:54:59,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 172 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:54:59,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:54:59,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:54:59,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:00,156 INFO L124 PetriNetUnfolderBase]: 1651/3183 cut-off events. [2024-01-27 15:55:00,156 INFO L125 PetriNetUnfolderBase]: For 2621/2621 co-relation queries the response was YES. [2024-01-27 15:55:00,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7732 conditions, 3183 events. 1651/3183 cut-off events. For 2621/2621 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21349 event pairs, 300 based on Foata normal form. 20/2637 useless extension candidates. Maximal degree in co-relation 7719. Up to 480 conditions per place. [2024-01-27 15:55:00,172 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 119 selfloop transitions, 28 changer transitions 82/234 dead transitions. [2024-01-27 15:55:00,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 234 transitions, 1303 flow [2024-01-27 15:55:00,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:55:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:55:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 366 transitions. [2024-01-27 15:55:00,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009852216748769 [2024-01-27 15:55:00,175 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 172 flow. Second operand 21 states and 366 transitions. [2024-01-27 15:55:00,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 234 transitions, 1303 flow [2024-01-27 15:55:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 234 transitions, 1267 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-01-27 15:55:00,184 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 447 flow [2024-01-27 15:55:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=447, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-01-27 15:55:00,185 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2024-01-27 15:55:00,185 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 447 flow [2024-01-27 15:55:00,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:00,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:00,186 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:00,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:00,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:00,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:00,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1384883908, now seen corresponding path program 4 times [2024-01-27 15:55:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:00,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913953643] [2024-01-27 15:55:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:55:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913953643] [2024-01-27 15:55:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913953643] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962757939] [2024-01-27 15:55:00,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:00,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:00,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:00,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:00,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:55:00,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:00,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:55:00,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:55:05,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:05,167 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:55:05,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-01-27 15:55:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:55:05,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962757939] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:05,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:05,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-01-27 15:55:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593596886] [2024-01-27 15:55:05,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:55:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:55:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=136, Unknown=1, NotChecked=0, Total=182 [2024-01-27 15:55:05,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:05,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 447 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:05,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:05,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:05,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:06,483 INFO L124 PetriNetUnfolderBase]: 3215/6129 cut-off events. [2024-01-27 15:55:06,483 INFO L125 PetriNetUnfolderBase]: For 14455/14455 co-relation queries the response was YES. [2024-01-27 15:55:06,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16998 conditions, 6129 events. 3215/6129 cut-off events. For 14455/14455 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 46275 event pairs, 438 based on Foata normal form. 54/5108 useless extension candidates. Maximal degree in co-relation 16975. Up to 928 conditions per place. [2024-01-27 15:55:06,513 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 111 selfloop transitions, 63 changer transitions 74/253 dead transitions. [2024-01-27 15:55:06,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 253 transitions, 1927 flow [2024-01-27 15:55:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:55:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:55:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 317 transitions. [2024-01-27 15:55:06,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6430020283975659 [2024-01-27 15:55:06,516 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 447 flow. Second operand 17 states and 317 transitions. [2024-01-27 15:55:06,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 253 transitions, 1927 flow [2024-01-27 15:55:06,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 253 transitions, 1675 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-01-27 15:55:06,541 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 1027 flow [2024-01-27 15:55:06,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1027, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-01-27 15:55:06,545 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 61 predicate places. [2024-01-27 15:55:06,545 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 1027 flow [2024-01-27 15:55:06,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:06,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:06,545 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:06,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:06,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1352632777, now seen corresponding path program 5 times [2024-01-27 15:55:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705991573] [2024-01-27 15:55:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-01-27 15:55:07,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705991573] [2024-01-27 15:55:07,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705991573] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:07,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307783043] [2024-01-27 15:55:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:55:07,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:07,083 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:07,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:55:07,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:55:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:07,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:55:07,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:55:07,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:55:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307783043] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:07,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:07,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-01-27 15:55:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576683067] [2024-01-27 15:55:07,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:55:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:55:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:55:07,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:07,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 1027 flow. Second operand has 22 states, 22 states have (on average 9.954545454545455) internal successors, (219), 22 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:07,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:07,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:07,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:08,541 INFO L124 PetriNetUnfolderBase]: 2327/4520 cut-off events. [2024-01-27 15:55:08,541 INFO L125 PetriNetUnfolderBase]: For 16439/16439 co-relation queries the response was YES. [2024-01-27 15:55:08,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13244 conditions, 4520 events. 2327/4520 cut-off events. For 16439/16439 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 33183 event pairs, 1406 based on Foata normal form. 40/3759 useless extension candidates. Maximal degree in co-relation 13213. Up to 2639 conditions per place. [2024-01-27 15:55:08,566 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 50 selfloop transitions, 4 changer transitions 97/156 dead transitions. [2024-01-27 15:55:08,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1345 flow [2024-01-27 15:55:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:55:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:55:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-01-27 15:55:08,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2024-01-27 15:55:08,568 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 1027 flow. Second operand 12 states and 195 transitions. [2024-01-27 15:55:08,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1345 flow [2024-01-27 15:55:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1141 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-01-27 15:55:08,607 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 479 flow [2024-01-27 15:55:08,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=479, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2024-01-27 15:55:08,609 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-01-27 15:55:08,609 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 479 flow [2024-01-27 15:55:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.954545454545455) internal successors, (219), 22 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:08,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:08,610 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:08,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:55:08,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:08,824 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:08,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1358877817, now seen corresponding path program 6 times [2024-01-27 15:55:08,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:08,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556065879] [2024-01-27 15:55:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556065879] [2024-01-27 15:55:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556065879] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735591599] [2024-01-27 15:55:09,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:55:09,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:09,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:09,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:09,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:55:09,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:55:09,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:09,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-27 15:55:09,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:09,565 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 19 treesize of output 1 [2024-01-27 15:55:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:09,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:10,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-01-27 15:55:10,403 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:55:10,404 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 58 treesize of output 45 [2024-01-27 15:55:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735591599] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:10,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:10,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-01-27 15:55:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176733467] [2024-01-27 15:55:10,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:55:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:55:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:55:10,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:10,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 479 flow. Second operand has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:10,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:10,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:10,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:14,803 INFO L124 PetriNetUnfolderBase]: 4091/7827 cut-off events. [2024-01-27 15:55:14,804 INFO L125 PetriNetUnfolderBase]: For 24819/24819 co-relation queries the response was YES. [2024-01-27 15:55:14,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22122 conditions, 7827 events. 4091/7827 cut-off events. For 24819/24819 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 60766 event pairs, 904 based on Foata normal form. 3/6470 useless extension candidates. Maximal degree in co-relation 22090. Up to 1507 conditions per place. [2024-01-27 15:55:14,843 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 269 selfloop transitions, 59 changer transitions 134/467 dead transitions. [2024-01-27 15:55:14,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 467 transitions, 3232 flow [2024-01-27 15:55:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:55:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:55:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 678 transitions. [2024-01-27 15:55:14,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6152450090744102 [2024-01-27 15:55:14,847 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 479 flow. Second operand 38 states and 678 transitions. [2024-01-27 15:55:14,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 467 transitions, 3232 flow [2024-01-27 15:55:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 467 transitions, 3024 flow, removed 100 selfloop flow, removed 11 redundant places. [2024-01-27 15:55:14,919 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 1057 flow [2024-01-27 15:55:14,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1057, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-01-27 15:55:14,920 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 92 predicate places. [2024-01-27 15:55:14,920 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 1057 flow [2024-01-27 15:55:14,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.393939393939394) internal successors, (310), 33 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:14,921 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:14,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:55:15,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:15,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:15,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 67419759, now seen corresponding path program 7 times [2024-01-27 15:55:15,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:15,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48803967] [2024-01-27 15:55:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:55:15,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:15,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48803967] [2024-01-27 15:55:15,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48803967] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:15,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654048669] [2024-01-27 15:55:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:55:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:15,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:15,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:55:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:15,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:55:15,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-27 15:55:15,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-27 15:55:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654048669] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:15,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:15,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-01-27 15:55:15,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200283625] [2024-01-27 15:55:15,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:15,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:55:15,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:55:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:55:15,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:15,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 1057 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 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) [2024-01-27 15:55:15,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:15,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:15,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:16,893 INFO L124 PetriNetUnfolderBase]: 5445/10402 cut-off events. [2024-01-27 15:55:16,894 INFO L125 PetriNetUnfolderBase]: For 37219/37219 co-relation queries the response was YES. [2024-01-27 15:55:16,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30426 conditions, 10402 events. 5445/10402 cut-off events. For 37219/37219 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 83684 event pairs, 1088 based on Foata normal form. 110/8682 useless extension candidates. Maximal degree in co-relation 30388. Up to 1600 conditions per place. [2024-01-27 15:55:16,939 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 83 selfloop transitions, 60 changer transitions 157/305 dead transitions. [2024-01-27 15:55:16,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 305 transitions, 2652 flow [2024-01-27 15:55:16,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-27 15:55:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-27 15:55:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 350 transitions. [2024-01-27 15:55:16,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-01-27 15:55:16,942 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 1057 flow. Second operand 20 states and 350 transitions. [2024-01-27 15:55:16,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 305 transitions, 2652 flow [2024-01-27 15:55:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 305 transitions, 2545 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-01-27 15:55:17,175 INFO L231 Difference]: Finished difference. Result has 133 places, 96 transitions, 1111 flow [2024-01-27 15:55:17,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1111, PETRI_PLACES=133, PETRI_TRANSITIONS=96} [2024-01-27 15:55:17,176 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 105 predicate places. [2024-01-27 15:55:17,176 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 96 transitions, 1111 flow [2024-01-27 15:55:17,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 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) [2024-01-27 15:55:17,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:17,177 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:17,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:17,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:17,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash -241771246, now seen corresponding path program 8 times [2024-01-27 15:55:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700464019] [2024-01-27 15:55:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:17,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:17,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700464019] [2024-01-27 15:55:17,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700464019] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:17,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887102604] [2024-01-27 15:55:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:55:17,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:17,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:17,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:17,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:55:18,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:55:18,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:18,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:55:18,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:18,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-27 15:55:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:18,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:19,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2024-01-27 15:55:19,238 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:55:19,238 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 61 treesize of output 47 [2024-01-27 15:55:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:55:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887102604] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:19,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 35 [2024-01-27 15:55:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527707258] [2024-01-27 15:55:19,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:19,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:55:19,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:55:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:55:19,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:19,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 96 transitions, 1111 flow. Second operand has 36 states, 36 states have (on average 9.222222222222221) internal successors, (332), 36 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:19,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:19,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:19,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:30,819 INFO L124 PetriNetUnfolderBase]: 9122/17337 cut-off events. [2024-01-27 15:55:30,819 INFO L125 PetriNetUnfolderBase]: For 90684/90684 co-relation queries the response was YES. [2024-01-27 15:55:30,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55391 conditions, 17337 events. 9122/17337 cut-off events. For 90684/90684 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 149093 event pairs, 681 based on Foata normal form. 25/14375 useless extension candidates. Maximal degree in co-relation 55349. Up to 2640 conditions per place. [2024-01-27 15:55:30,898 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 304 selfloop transitions, 206 changer transitions 193/708 dead transitions. [2024-01-27 15:55:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 708 transitions, 6365 flow [2024-01-27 15:55:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-27 15:55:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-27 15:55:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 909 transitions. [2024-01-27 15:55:30,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268965517241379 [2024-01-27 15:55:30,902 INFO L175 Difference]: Start difference. First operand has 133 places, 96 transitions, 1111 flow. Second operand 50 states and 909 transitions. [2024-01-27 15:55:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 708 transitions, 6365 flow [2024-01-27 15:55:31,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 708 transitions, 5580 flow, removed 386 selfloop flow, removed 18 redundant places. [2024-01-27 15:55:31,072 INFO L231 Difference]: Finished difference. Result has 146 places, 242 transitions, 3534 flow [2024-01-27 15:55:31,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3534, PETRI_PLACES=146, PETRI_TRANSITIONS=242} [2024-01-27 15:55:31,073 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-01-27 15:55:31,073 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 242 transitions, 3534 flow [2024-01-27 15:55:31,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.222222222222221) internal successors, (332), 36 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:31,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:31,074 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:31,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:31,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-27 15:55:31,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:31,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1942008732, now seen corresponding path program 9 times [2024-01-27 15:55:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:31,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022104676] [2024-01-27 15:55:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:31,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:31,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022104676] [2024-01-27 15:55:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022104676] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363690914] [2024-01-27 15:55:31,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:55:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:31,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:31,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:31,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:55:32,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:55:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:32,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:55:32,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:32,230 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 19 treesize of output 1 [2024-01-27 15:55:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-01-27 15:55:32,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:33,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-01-27 15:55:33,430 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:55:33,431 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 58 treesize of output 45 [2024-01-27 15:55:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-01-27 15:55:33,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363690914] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:33,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:33,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2024-01-27 15:55:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730889604] [2024-01-27 15:55:33,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:33,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-01-27 15:55:33,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-01-27 15:55:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2024-01-27 15:55:33,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:33,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 242 transitions, 3534 flow. Second operand has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:33,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:33,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:33,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:55:48,781 INFO L124 PetriNetUnfolderBase]: 42679/81096 cut-off events. [2024-01-27 15:55:48,782 INFO L125 PetriNetUnfolderBase]: For 360174/360174 co-relation queries the response was YES. [2024-01-27 15:55:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252587 conditions, 81096 events. 42679/81096 cut-off events. For 360174/360174 co-relation queries the response was YES. Maximal size of possible extension queue 2202. Compared 837578 event pairs, 13254 based on Foata normal form. 106/67254 useless extension candidates. Maximal degree in co-relation 252542. Up to 12368 conditions per place. [2024-01-27 15:55:49,431 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 879 selfloop transitions, 608 changer transitions 251/1743 dead transitions. [2024-01-27 15:55:49,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1743 transitions, 22717 flow [2024-01-27 15:55:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-01-27 15:55:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2024-01-27 15:55:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1207 transitions. [2024-01-27 15:55:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306165099268548 [2024-01-27 15:55:49,435 INFO L175 Difference]: Start difference. First operand has 146 places, 242 transitions, 3534 flow. Second operand 66 states and 1207 transitions. [2024-01-27 15:55:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1743 transitions, 22717 flow [2024-01-27 15:55:51,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1743 transitions, 19722 flow, removed 1468 selfloop flow, removed 14 redundant places. [2024-01-27 15:55:51,646 INFO L231 Difference]: Finished difference. Result has 215 places, 809 transitions, 13167 flow [2024-01-27 15:55:51,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3004, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=13167, PETRI_PLACES=215, PETRI_TRANSITIONS=809} [2024-01-27 15:55:51,647 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 187 predicate places. [2024-01-27 15:55:51,647 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 809 transitions, 13167 flow [2024-01-27 15:55:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 9.333333333333334) internal successors, (336), 36 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:51,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:55:51,648 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:55:51,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:55:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:55:51,852 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:55:51,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:55:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 406927783, now seen corresponding path program 10 times [2024-01-27 15:55:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:55:51,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861324609] [2024-01-27 15:55:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:55:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:55:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:55:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:55:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:55:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861324609] [2024-01-27 15:55:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861324609] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:55:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950605842] [2024-01-27 15:55:52,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:55:52,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:55:52,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:55:52,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:55:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:55:52,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:55:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:55:52,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2024-01-27 15:55:52,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:55:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:55:53,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:55:53,506 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-01-27 15:55:53,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 18 [2024-01-27 15:55:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-01-27 15:55:53,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950605842] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:55:53,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:55:53,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 12] total 43 [2024-01-27 15:55:53,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750080101] [2024-01-27 15:55:53,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:55:53,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-01-27 15:55:53,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:55:53,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-01-27 15:55:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2024-01-27 15:55:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-01-27 15:55:53,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 809 transitions, 13167 flow. Second operand has 44 states, 44 states have (on average 9.386363636363637) internal successors, (413), 44 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:55:53,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:55:53,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-01-27 15:55:53,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand