./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.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/popl20-more-min-array-hom.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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:44:55,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:44:55,100 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:44:55,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:44:55,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:44:55,127 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:44:55,127 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:44:55,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:44:55,128 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:44:55,132 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:44:55,133 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:44:55,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:44:55,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:44:55,134 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:44:55,134 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:44:55,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:44:55,135 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:44:55,135 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:44:55,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:44:55,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:44:55,136 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:44:55,136 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:44:55,137 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:44:55,137 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:44:55,137 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:44:55,137 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:44:55,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:44:55,138 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:44:55,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:44:55,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:44:55,139 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:44:55,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:44:55,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:44:55,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:44:55,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:44:55,141 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:44:55,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:44:55,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:44:55,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-01-27 15:44:55,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:44:55,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:44:55,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:44:55,344 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:44:55,344 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:44:55,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-01-27 15:44:56,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:44:56,578 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:44:56,579 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c [2024-01-27 15:44:56,588 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ebed28d/34732865c8b04cce96bfdc6cb0563773/FLAGcc3c439b5 [2024-01-27 15:44:56,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52ebed28d/34732865c8b04cce96bfdc6cb0563773 [2024-01-27 15:44:56,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:44:56,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:44:56,611 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:44:56,611 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:44:56,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:44:56,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380cbd56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56, skipping insertion in model container [2024-01-27 15:44:56,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:44:56,763 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-01-27 15:44:56,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:44:56,777 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:44:56,794 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-min-array-hom.wvr.c[2625,2638] [2024-01-27 15:44:56,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:44:56,809 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:44:56,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56 WrapperNode [2024-01-27 15:44:56,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:44:56,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:44:56,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:44:56,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:44:56,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,837 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2024-01-27 15:44:56,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:44:56,838 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:44:56,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:44:56,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:44:56,846 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,860 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 7, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:44:56,861 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,861 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:44:56,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:44:56,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:44:56,877 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:44:56,878 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (1/1) ... [2024-01-27 15:44:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:44:56,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:44:56,910 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 15:44:56,917 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 15:44:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:44:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:44:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:44:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:44:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:44:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:44:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:44:56,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:44:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:44:56,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:44:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:44:56,951 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 15:44:57,050 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:44:57,052 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:44:57,223 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:44:57,223 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:44:57,370 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:44:57,370 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:44:57,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:44:57 BoogieIcfgContainer [2024-01-27 15:44:57,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:44:57,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:44:57,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:44:57,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:44:57,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:44:56" (1/3) ... [2024-01-27 15:44:57,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b14847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:44:57, skipping insertion in model container [2024-01-27 15:44:57,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:44:56" (2/3) ... [2024-01-27 15:44:57,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b14847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:44:57, skipping insertion in model container [2024-01-27 15:44:57,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:44:57" (3/3) ... [2024-01-27 15:44:57,377 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-01-27 15:44:57,383 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:44:57,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:44:57,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:44:57,390 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:44:57,423 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 15:44:57,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2024-01-27 15:44:57,485 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-01-27 15:44:57,485 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:44:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-27 15:44:57,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2024-01-27 15:44:57,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2024-01-27 15:44:57,504 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:44:57,510 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;@255113de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:44:57,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 15:44:57,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:44:57,524 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-01-27 15:44:57,524 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:44:57,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:57,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:57,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:44:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1064244367, now seen corresponding path program 1 times [2024-01-27 15:44:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:57,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984643638] [2024-01-27 15:44:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:57,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:57,964 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 15:44:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984643638] [2024-01-27 15:44:57,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984643638] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:44:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:44:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:44:57,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995008680] [2024-01-27 15:44:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:44:57,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:44:57,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:44:58,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:44:58,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:44:58,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:44:58,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:58,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:44:58,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:44:58,219 INFO L124 PetriNetUnfolderBase]: 674/1036 cut-off events. [2024-01-27 15:44:58,219 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-01-27 15:44:58,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 1036 events. 674/1036 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4101 event pairs, 140 based on Foata normal form. 1/1023 useless extension candidates. Maximal degree in co-relation 1708. Up to 740 conditions per place. [2024-01-27 15:44:58,230 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 41 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2024-01-27 15:44:58,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 225 flow [2024-01-27 15:44:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:44:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:44:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-01-27 15:44:58,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-01-27 15:44:58,242 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 3 states and 68 transitions. [2024-01-27 15:44:58,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 225 flow [2024-01-27 15:44:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 203 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-27 15:44:58,251 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 94 flow [2024-01-27 15:44:58,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2024-01-27 15:44:58,256 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-01-27 15:44:58,256 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 94 flow [2024-01-27 15:44:58,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:44:58,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:58,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:58,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:44:58,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:44:58,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash 937462874, now seen corresponding path program 1 times [2024-01-27 15:44:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520831171] [2024-01-27 15:44:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:58,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:44:58,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:58,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520831171] [2024-01-27 15:44:58,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520831171] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:44:58,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:44:58,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:44:58,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768817666] [2024-01-27 15:44:58,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:44:58,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:44:58,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:44:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:44:58,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:44:58,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:58,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:58,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:44:58,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:44:58,551 INFO L124 PetriNetUnfolderBase]: 674/1032 cut-off events. [2024-01-27 15:44:58,551 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-01-27 15:44:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2349 conditions, 1032 events. 674/1032 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4218 event pairs, 447 based on Foata normal form. 0/1002 useless extension candidates. Maximal degree in co-relation 875. Up to 984 conditions per place. [2024-01-27 15:44:58,558 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-01-27 15:44:58,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 158 flow [2024-01-27 15:44:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:44:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:44:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-27 15:44:58,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:44:58,561 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 94 flow. Second operand 3 states and 50 transitions. [2024-01-27 15:44:58,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 158 flow [2024-01-27 15:44:58,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 35 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:44:58,566 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 102 flow [2024-01-27 15:44:58,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-01-27 15:44:58,568 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-01-27 15:44:58,568 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 102 flow [2024-01-27 15:44:58,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:58,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:58,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:44:58,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:44:58,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 200410163, now seen corresponding path program 1 times [2024-01-27 15:44:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:58,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070370373] [2024-01-27 15:44:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:44:58,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:58,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070370373] [2024-01-27 15:44:58,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070370373] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:44:58,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:44:58,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:44:58,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918869636] [2024-01-27 15:44:58,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:44:58,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:44:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:44:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:44:58,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:44:58,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:58,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:58,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:44:58,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:44:58,852 INFO L124 PetriNetUnfolderBase]: 865/1276 cut-off events. [2024-01-27 15:44:58,853 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-01-27 15:44:58,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1276 events. 865/1276 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5147 event pairs, 265 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 2812. Up to 649 conditions per place. [2024-01-27 15:44:58,859 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-01-27 15:44:58,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 240 flow [2024-01-27 15:44:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:44:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:44:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-01-27 15:44:58,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-01-27 15:44:58,863 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 102 flow. Second operand 4 states and 67 transitions. [2024-01-27 15:44:58,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 240 flow [2024-01-27 15:44:58,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 234 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:44:58,866 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 117 flow [2024-01-27 15:44:58,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-01-27 15:44:58,868 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-01-27 15:44:58,868 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 117 flow [2024-01-27 15:44:58,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:58,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:58,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:44:58,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:44:58,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1953148681, now seen corresponding path program 1 times [2024-01-27 15:44:58,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:58,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652368154] [2024-01-27 15:44:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:58,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:44:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:59,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652368154] [2024-01-27 15:44:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652368154] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:44:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966730583] [2024-01-27 15:44:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:44:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:44:59,008 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 15:44:59,036 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 15:44:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:59,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:44:59,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:44:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:44:59,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:44:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:44:59,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966730583] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:44:59,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:44:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-01-27 15:44:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510136588] [2024-01-27 15:44:59,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:44:59,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:44:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:44:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:44:59,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:44:59,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:59,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:59,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:44:59,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:44:59,360 INFO L124 PetriNetUnfolderBase]: 900/1367 cut-off events. [2024-01-27 15:44:59,361 INFO L125 PetriNetUnfolderBase]: For 555/555 co-relation queries the response was YES. [2024-01-27 15:44:59,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3425 conditions, 1367 events. 900/1367 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5725 event pairs, 281 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 3405. Up to 670 conditions per place. [2024-01-27 15:44:59,368 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 43 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-01-27 15:44:59,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 265 flow [2024-01-27 15:44:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:44:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:44:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-01-27 15:44:59,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2024-01-27 15:44:59,371 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 117 flow. Second operand 5 states and 74 transitions. [2024-01-27 15:44:59,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 265 flow [2024-01-27 15:44:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:44:59,376 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 136 flow [2024-01-27 15:44:59,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-01-27 15:44:59,377 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2024-01-27 15:44:59,377 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 136 flow [2024-01-27 15:44:59,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:44:59,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:59,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:44:59,396 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 15:44:59,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:44:59,585 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:44:59,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -239191844, now seen corresponding path program 1 times [2024-01-27 15:44:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:59,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847775906] [2024-01-27 15:44:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:45:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:45:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847775906] [2024-01-27 15:45:00,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847775906] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:45:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224827203] [2024-01-27 15:45:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:45:00,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:45:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:45:00,242 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 15:45:00,269 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 15:45:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:45:00,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:45:00,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:45:00,383 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 15:45:00,599 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 59 treesize of output 35 [2024-01-27 15:45:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:00,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:45:02,335 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 226 treesize of output 208 [2024-01-27 15:45:02,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:45:02,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-01-27 15:45:18,881 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 282 treesize of output 254 [2024-01-27 15:45:18,893 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-01-27 15:45:18,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 1 [2024-01-27 15:45:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224827203] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:45:18,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:45:18,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-01-27 15:45:18,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187111524] [2024-01-27 15:45:18,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:45:18,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:45:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:45:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:45:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:45:19,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:45:19,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 136 flow. Second operand has 25 states, 25 states have (on average 9.12) internal successors, (228), 25 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 15:45:19,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:45:19,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:45:19,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:45:21,132 INFO L124 PetriNetUnfolderBase]: 1993/3005 cut-off events. [2024-01-27 15:45:21,132 INFO L125 PetriNetUnfolderBase]: For 1852/1852 co-relation queries the response was YES. [2024-01-27 15:45:21,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8274 conditions, 3005 events. 1993/3005 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13912 event pairs, 114 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 6106. Up to 1481 conditions per place. [2024-01-27 15:45:21,150 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 151 selfloop transitions, 57 changer transitions 1/213 dead transitions. [2024-01-27 15:45:21,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 213 transitions, 1123 flow [2024-01-27 15:45:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:45:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:45:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 335 transitions. [2024-01-27 15:45:21,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-27 15:45:21,153 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 136 flow. Second operand 21 states and 335 transitions. [2024-01-27 15:45:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 213 transitions, 1123 flow [2024-01-27 15:45:21,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 213 transitions, 1106 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:45:21,160 INFO L231 Difference]: Finished difference. Result has 66 places, 93 transitions, 547 flow [2024-01-27 15:45:21,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=547, PETRI_PLACES=66, PETRI_TRANSITIONS=93} [2024-01-27 15:45:21,162 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2024-01-27 15:45:21,162 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 93 transitions, 547 flow [2024-01-27 15:45:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.12) internal successors, (228), 25 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 15:45:21,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:45:21,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:45:21,189 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 15:45:21,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:45:21,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:45:21,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:45:21,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1087062616, now seen corresponding path program 2 times [2024-01-27 15:45:21,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:45:21,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646979010] [2024-01-27 15:45:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:45:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:45:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:45:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:45:21,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646979010] [2024-01-27 15:45:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646979010] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:45:21,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243890279] [2024-01-27 15:45:21,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:45:21,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:45:21,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:45:21,935 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 15:45:21,936 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 15:45:22,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:45:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:45:22,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:45:22,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:45:22,059 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 15:45:22,202 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 58 treesize of output 34 [2024-01-27 15:45:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:22,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:45:23,563 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 282 treesize of output 254 [2024-01-27 15:45:23,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:45:23,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-01-27 15:45:44,794 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 226 treesize of output 208 [2024-01-27 15:45:44,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:45:44,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 261 treesize of output 291 [2024-01-27 15:45:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:51,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243890279] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:45:51,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:45:51,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-01-27 15:45:51,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35159974] [2024-01-27 15:45:51,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:45:51,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:45:51,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:45:51,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:45:51,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:45:51,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-01-27 15:45:51,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 93 transitions, 547 flow. Second operand has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 15:45:51,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:45:51,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-01-27 15:45:51,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:45:52,623 INFO L124 PetriNetUnfolderBase]: 1667/2662 cut-off events. [2024-01-27 15:45:52,624 INFO L125 PetriNetUnfolderBase]: For 3527/3532 co-relation queries the response was YES. [2024-01-27 15:45:52,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8636 conditions, 2662 events. 1667/2662 cut-off events. For 3527/3532 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13306 event pairs, 128 based on Foata normal form. 5/2660 useless extension candidates. Maximal degree in co-relation 7992. Up to 1778 conditions per place. [2024-01-27 15:45:52,640 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 135 selfloop transitions, 49 changer transitions 1/191 dead transitions. [2024-01-27 15:45:52,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 191 transitions, 1251 flow [2024-01-27 15:45:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-27 15:45:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-27 15:45:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 252 transitions. [2024-01-27 15:45:52,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-01-27 15:45:52,642 INFO L175 Difference]: Start difference. First operand has 66 places, 93 transitions, 547 flow. Second operand 15 states and 252 transitions. [2024-01-27 15:45:52,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 191 transitions, 1251 flow [2024-01-27 15:45:52,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 191 transitions, 1133 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-01-27 15:45:52,653 INFO L231 Difference]: Finished difference. Result has 78 places, 113 transitions, 683 flow [2024-01-27 15:45:52,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=683, PETRI_PLACES=78, PETRI_TRANSITIONS=113} [2024-01-27 15:45:52,654 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 41 predicate places. [2024-01-27 15:45:52,654 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 113 transitions, 683 flow [2024-01-27 15:45:52,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.31578947368421) internal successors, (196), 19 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 15:45:52,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:45:52,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:45:52,668 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 15:45:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:45:52,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:45:52,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:45:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1909570378, now seen corresponding path program 3 times [2024-01-27 15:45:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:45:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549533023] [2024-01-27 15:45:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:45:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:45:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:45:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:45:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549533023] [2024-01-27 15:45:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549533023] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:45:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282689531] [2024-01-27 15:45:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:45:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:45:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:45:53,415 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 15:45:53,415 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 15:45:53,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:45:53,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:45:53,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:45:53,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:45:53,539 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 15:45:53,722 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 59 treesize of output 35 [2024-01-27 15:45:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:53,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:45:55,182 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 217 treesize of output 195 [2024-01-27 15:45:55,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:45:55,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 278 [2024-01-27 15:45:58,696 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 106 treesize of output 96 [2024-01-27 15:45:58,705 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:45:58,705 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 125 treesize of output 115 [2024-01-27 15:45:58,868 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 183 treesize of output 167 [2024-01-27 15:45:58,891 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-27 15:45:58,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 1 [2024-01-27 15:45:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:45:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282689531] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:45:58,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:45:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2024-01-27 15:45:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798952774] [2024-01-27 15:45:58,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:45:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-27 15:45:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:45:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-27 15:45:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-01-27 15:45:59,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:45:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 113 transitions, 683 flow. Second operand has 23 states, 23 states have (on average 9.0) internal successors, (207), 23 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 15:45:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:45:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:45:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:00,749 INFO L124 PetriNetUnfolderBase]: 3115/4726 cut-off events. [2024-01-27 15:46:00,749 INFO L125 PetriNetUnfolderBase]: For 5390/5399 co-relation queries the response was YES. [2024-01-27 15:46:00,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15012 conditions, 4726 events. 3115/4726 cut-off events. For 5390/5399 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24333 event pairs, 204 based on Foata normal form. 10/4735 useless extension candidates. Maximal degree in co-relation 13495. Up to 2759 conditions per place. [2024-01-27 15:46:00,779 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 168 selfloop transitions, 89 changer transitions 2/263 dead transitions. [2024-01-27 15:46:00,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 263 transitions, 1781 flow [2024-01-27 15:46:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:46:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:46:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 298 transitions. [2024-01-27 15:46:00,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481203007518797 [2024-01-27 15:46:00,781 INFO L175 Difference]: Start difference. First operand has 78 places, 113 transitions, 683 flow. Second operand 19 states and 298 transitions. [2024-01-27 15:46:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 263 transitions, 1781 flow [2024-01-27 15:46:00,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 263 transitions, 1744 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-01-27 15:46:00,795 INFO L231 Difference]: Finished difference. Result has 98 places, 158 transitions, 1226 flow [2024-01-27 15:46:00,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1226, PETRI_PLACES=98, PETRI_TRANSITIONS=158} [2024-01-27 15:46:00,795 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 61 predicate places. [2024-01-27 15:46:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 158 transitions, 1226 flow [2024-01-27 15:46:00,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.0) internal successors, (207), 23 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 15:46:00,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:00,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:00,808 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 15:46:01,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:01,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:01,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash 580684854, now seen corresponding path program 4 times [2024-01-27 15:46:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:01,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616597757] [2024-01-27 15:46:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:01,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:01,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616597757] [2024-01-27 15:46:01,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616597757] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:01,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835489381] [2024-01-27 15:46:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:46:01,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:01,481 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 15:46:01,481 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 15:46:01,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:46:01,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:01,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-27 15:46:01,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:01,571 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 15:46:01,771 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 58 treesize of output 34 [2024-01-27 15:46:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:01,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:03,137 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 106 treesize of output 96 [2024-01-27 15:46:03,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:46:03,144 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 125 treesize of output 119 [2024-01-27 15:46:03,327 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 217 treesize of output 195 [2024-01-27 15:46:03,336 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-27 15:46:03,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-01-27 15:46:03,340 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 183 treesize of output 167 [2024-01-27 15:46:03,350 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-27 15:46:03,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 1 [2024-01-27 15:46:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:03,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835489381] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:03,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:03,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2024-01-27 15:46:03,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690577882] [2024-01-27 15:46:03,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:46:03,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:03,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:46:03,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:46:03,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:03,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 158 transitions, 1226 flow. Second operand has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:46:03,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:03,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:03,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:05,481 INFO L124 PetriNetUnfolderBase]: 3588/5461 cut-off events. [2024-01-27 15:46:05,481 INFO L125 PetriNetUnfolderBase]: For 9619/9628 co-relation queries the response was YES. [2024-01-27 15:46:05,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19478 conditions, 5461 events. 3588/5461 cut-off events. For 9619/9628 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28887 event pairs, 246 based on Foata normal form. 10/5470 useless extension candidates. Maximal degree in co-relation 17717. Up to 2035 conditions per place. [2024-01-27 15:46:05,515 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 150 selfloop transitions, 140 changer transitions 1/295 dead transitions. [2024-01-27 15:46:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 295 transitions, 2313 flow [2024-01-27 15:46:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:46:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:46:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 330 transitions. [2024-01-27 15:46:05,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-01-27 15:46:05,517 INFO L175 Difference]: Start difference. First operand has 98 places, 158 transitions, 1226 flow. Second operand 21 states and 330 transitions. [2024-01-27 15:46:05,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 295 transitions, 2313 flow [2024-01-27 15:46:05,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 295 transitions, 2264 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-01-27 15:46:05,538 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1701 flow [2024-01-27 15:46:05,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1701, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-01-27 15:46:05,539 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-01-27 15:46:05,539 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1701 flow [2024-01-27 15:46:05,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.136363636363637) internal successors, (201), 22 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 15:46:05,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:05,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:05,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:05,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:05,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:05,745 INFO L85 PathProgramCache]: Analyzing trace with hash 981316720, now seen corresponding path program 5 times [2024-01-27 15:46:05,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:05,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112211958] [2024-01-27 15:46:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:06,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112211958] [2024-01-27 15:46:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112211958] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:06,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219036431] [2024-01-27 15:46:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:46:06,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:06,172 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 15:46:06,173 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 15:46:06,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:46:06,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:06,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:46:06,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:06,281 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 15:46:06,504 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 59 treesize of output 35 [2024-01-27 15:46:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:06,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:08,603 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 182 treesize of output 166 [2024-01-27 15:46:08,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:46:08,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 218 [2024-01-27 15:46:12,334 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 106 treesize of output 96 [2024-01-27 15:46:12,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-01-27 15:46:12,345 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 125 treesize of output 115 [2024-01-27 15:46:12,555 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 229 treesize of output 205 [2024-01-27 15:46:12,569 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-01-27 15:46:12,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-01-27 15:46:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:12,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219036431] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:12,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:12,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2024-01-27 15:46:12,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584724046] [2024-01-27 15:46:12,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:12,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-27 15:46:12,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:12,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-27 15:46:12,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-01-27 15:46:12,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:12,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1701 flow. Second operand has 27 states, 27 states have (on average 8.62962962962963) internal successors, (233), 27 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 15:46:12,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:12,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:12,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:16,163 INFO L124 PetriNetUnfolderBase]: 3810/5760 cut-off events. [2024-01-27 15:46:16,163 INFO L125 PetriNetUnfolderBase]: For 14161/14170 co-relation queries the response was YES. [2024-01-27 15:46:16,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22625 conditions, 5760 events. 3810/5760 cut-off events. For 14161/14170 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 30487 event pairs, 94 based on Foata normal form. 10/5769 useless extension candidates. Maximal degree in co-relation 21716. Up to 2097 conditions per place. [2024-01-27 15:46:16,206 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 174 selfloop transitions, 160 changer transitions 2/340 dead transitions. [2024-01-27 15:46:16,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 340 transitions, 2953 flow [2024-01-27 15:46:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:46:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:46:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 378 transitions. [2024-01-27 15:46:16,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-01-27 15:46:16,208 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1701 flow. Second operand 24 states and 378 transitions. [2024-01-27 15:46:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 340 transitions, 2953 flow [2024-01-27 15:46:16,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 340 transitions, 2858 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-01-27 15:46:16,258 INFO L231 Difference]: Finished difference. Result has 131 places, 202 transitions, 2192 flow [2024-01-27 15:46:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2192, PETRI_PLACES=131, PETRI_TRANSITIONS=202} [2024-01-27 15:46:16,259 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2024-01-27 15:46:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 202 transitions, 2192 flow [2024-01-27 15:46:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.62962962962963) internal successors, (233), 27 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 15:46:16,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:16,261 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, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:16,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:16,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:16,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:16,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1066836863, now seen corresponding path program 6 times [2024-01-27 15:46:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:16,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730521891] [2024-01-27 15:46:16,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:16,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:16,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730521891] [2024-01-27 15:46:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730521891] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216858283] [2024-01-27 15:46:16,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:46:16,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:16,544 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 15:46:16,553 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 15:46:16,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:46:16,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:16,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:16,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:16,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216858283] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:16,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:46:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125722015] [2024-01-27 15:46:16,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:16,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:46:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:46:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:46:16,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:16,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 202 transitions, 2192 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 15:46:16,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:16,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:16,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:17,472 INFO L124 PetriNetUnfolderBase]: 5049/7539 cut-off events. [2024-01-27 15:46:17,472 INFO L125 PetriNetUnfolderBase]: For 26111/26155 co-relation queries the response was YES. [2024-01-27 15:46:17,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31278 conditions, 7539 events. 5049/7539 cut-off events. For 26111/26155 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 42266 event pairs, 1538 based on Foata normal form. 66/7602 useless extension candidates. Maximal degree in co-relation 29273. Up to 3041 conditions per place. [2024-01-27 15:46:17,528 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 305 selfloop transitions, 33 changer transitions 0/343 dead transitions. [2024-01-27 15:46:17,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 343 transitions, 3976 flow [2024-01-27 15:46:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:46:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:46:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-01-27 15:46:17,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:46:17,530 INFO L175 Difference]: Start difference. First operand has 131 places, 202 transitions, 2192 flow. Second operand 10 states and 175 transitions. [2024-01-27 15:46:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 343 transitions, 3976 flow [2024-01-27 15:46:17,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 343 transitions, 3636 flow, removed 53 selfloop flow, removed 15 redundant places. [2024-01-27 15:46:17,614 INFO L231 Difference]: Finished difference. Result has 128 places, 209 transitions, 2116 flow [2024-01-27 15:46:17,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2116, PETRI_PLACES=128, PETRI_TRANSITIONS=209} [2024-01-27 15:46:17,615 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-01-27 15:46:17,615 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 209 transitions, 2116 flow [2024-01-27 15:46:17,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 15:46:17,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:17,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:17,630 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 15:46:17,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:17,833 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:17,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:17,833 INFO L85 PathProgramCache]: Analyzing trace with hash 931974450, now seen corresponding path program 1 times [2024-01-27 15:46:17,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:17,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761235518] [2024-01-27 15:46:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:17,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:17,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:17,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761235518] [2024-01-27 15:46:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761235518] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000343043] [2024-01-27 15:46:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:17,922 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 15:46:17,948 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 15:46:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:18,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:18,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:18,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000343043] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:18,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-01-27 15:46:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827798803] [2024-01-27 15:46:18,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:46:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:46:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-27 15:46:18,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:18,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 209 transitions, 2116 flow. Second operand has 13 states, 13 states have (on average 9.461538461538462) internal successors, (123), 13 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 15:46:18,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:18,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:18,616 INFO L124 PetriNetUnfolderBase]: 3568/5669 cut-off events. [2024-01-27 15:46:18,616 INFO L125 PetriNetUnfolderBase]: For 20653/20682 co-relation queries the response was YES. [2024-01-27 15:46:18,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22890 conditions, 5669 events. 3568/5669 cut-off events. For 20653/20682 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33779 event pairs, 1882 based on Foata normal form. 2/5515 useless extension candidates. Maximal degree in co-relation 21693. Up to 2151 conditions per place. [2024-01-27 15:46:18,664 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 276 selfloop transitions, 6 changer transitions 0/291 dead transitions. [2024-01-27 15:46:18,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 291 transitions, 3510 flow [2024-01-27 15:46:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:46:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:46:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-01-27 15:46:18,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-01-27 15:46:18,668 INFO L175 Difference]: Start difference. First operand has 128 places, 209 transitions, 2116 flow. Second operand 6 states and 103 transitions. [2024-01-27 15:46:18,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 291 transitions, 3510 flow [2024-01-27 15:46:18,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 291 transitions, 3499 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-27 15:46:18,714 INFO L231 Difference]: Finished difference. Result has 133 places, 156 transitions, 1566 flow [2024-01-27 15:46:18,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1566, PETRI_PLACES=133, PETRI_TRANSITIONS=156} [2024-01-27 15:46:18,715 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 96 predicate places. [2024-01-27 15:46:18,715 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 156 transitions, 1566 flow [2024-01-27 15:46:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.461538461538462) internal successors, (123), 13 states have internal predecessors, (123), 0 states have call successors, (0), 0 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 15:46:18,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:18,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:18,729 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 15:46:18,926 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,SelfDestructingSolverStorable10 [2024-01-27 15:46:18,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:18,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:18,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1321712199, now seen corresponding path program 7 times [2024-01-27 15:46:18,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:18,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040509183] [2024-01-27 15:46:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:18,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040509183] [2024-01-27 15:46:18,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040509183] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:18,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669263605] [2024-01-27 15:46:18,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:46:18,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:18,992 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 15:46:18,997 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 15:46:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:19,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:19,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:19,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:46:19,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669263605] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:19,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:19,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:46:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92277657] [2024-01-27 15:46:19,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:46:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:46:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:46:19,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:19,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 156 transitions, 1566 flow. Second operand has 14 states, 14 states have (on average 9.857142857142858) internal successors, (138), 14 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 15:46:19,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:19,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:19,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:19,704 INFO L124 PetriNetUnfolderBase]: 3544/5637 cut-off events. [2024-01-27 15:46:19,704 INFO L125 PetriNetUnfolderBase]: For 18561/18709 co-relation queries the response was YES. [2024-01-27 15:46:19,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23413 conditions, 5637 events. 3544/5637 cut-off events. For 18561/18709 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32707 event pairs, 1685 based on Foata normal form. 218/5826 useless extension candidates. Maximal degree in co-relation 22071. Up to 2100 conditions per place. [2024-01-27 15:46:19,743 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 153 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-01-27 15:46:19,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 188 transitions, 2039 flow [2024-01-27 15:46:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:46:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:46:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-01-27 15:46:19,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-01-27 15:46:19,744 INFO L175 Difference]: Start difference. First operand has 133 places, 156 transitions, 1566 flow. Second operand 7 states and 119 transitions. [2024-01-27 15:46:19,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 188 transitions, 2039 flow [2024-01-27 15:46:19,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 188 transitions, 2010 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-01-27 15:46:19,793 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1394 flow [2024-01-27 15:46:19,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-01-27 15:46:19,795 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 99 predicate places. [2024-01-27 15:46:19,795 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1394 flow [2024-01-27 15:46:19,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.857142857142858) internal successors, (138), 14 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 15:46:19,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:19,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:19,809 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 15:46:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:20,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:20,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1104991119, now seen corresponding path program 8 times [2024-01-27 15:46:20,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:20,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931862882] [2024-01-27 15:46:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931862882] [2024-01-27 15:46:20,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931862882] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319035646] [2024-01-27 15:46:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:46:20,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:20,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:20,083 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 15:46:20,100 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 15:46:20,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:46:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:20,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:46:20,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:20,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:20,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319035646] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:20,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:20,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-27 15:46:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267909324] [2024-01-27 15:46:20,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:46:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:46:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:46:20,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-01-27 15:46:20,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1394 flow. Second operand has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 15:46:20,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:20,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-01-27 15:46:20,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:20,746 INFO L124 PetriNetUnfolderBase]: 2782/4435 cut-off events. [2024-01-27 15:46:20,746 INFO L125 PetriNetUnfolderBase]: For 17524/17648 co-relation queries the response was YES. [2024-01-27 15:46:20,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18351 conditions, 4435 events. 2782/4435 cut-off events. For 17524/17648 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24963 event pairs, 1349 based on Foata normal form. 284/4708 useless extension candidates. Maximal degree in co-relation 17569. Up to 1865 conditions per place. [2024-01-27 15:46:20,768 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 36 selfloop transitions, 3 changer transitions 108/152 dead transitions. [2024-01-27 15:46:20,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 152 transitions, 1738 flow [2024-01-27 15:46:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:46:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:46:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-01-27 15:46:20,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4816326530612245 [2024-01-27 15:46:20,769 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1394 flow. Second operand 7 states and 118 transitions. [2024-01-27 15:46:20,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 152 transitions, 1738 flow [2024-01-27 15:46:20,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 152 transitions, 1585 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-01-27 15:46:20,812 INFO L231 Difference]: Finished difference. Result has 132 places, 44 transitions, 253 flow [2024-01-27 15:46:20,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=132, PETRI_TRANSITIONS=44} [2024-01-27 15:46:20,813 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 95 predicate places. [2024-01-27 15:46:20,813 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 44 transitions, 253 flow [2024-01-27 15:46:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.571428571428571) internal successors, (134), 14 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 15:46:20,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:20,813 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:20,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:21,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:46:21,024 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:21,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1572314240, now seen corresponding path program 9 times [2024-01-27 15:46:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884527190] [2024-01-27 15:46:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:21,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:21,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884527190] [2024-01-27 15:46:21,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884527190] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:21,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123809430] [2024-01-27 15:46:21,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:46:21,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:21,150 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:21,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:46:21,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:46:21,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:21,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:46:21,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:21,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:21,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123809430] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:21,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:21,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-27 15:46:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247245472] [2024-01-27 15:46:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:21,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:46:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:46:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:46:21,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:46:21,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 44 transitions, 253 flow. Second operand has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 15:46:21,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:21,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:46:21,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:22,047 INFO L124 PetriNetUnfolderBase]: 2914/4241 cut-off events. [2024-01-27 15:46:22,047 INFO L125 PetriNetUnfolderBase]: For 9922/9922 co-relation queries the response was YES. [2024-01-27 15:46:22,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15804 conditions, 4241 events. 2914/4241 cut-off events. For 9922/9922 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20788 event pairs, 737 based on Foata normal form. 20/3990 useless extension candidates. Maximal degree in co-relation 15771. Up to 1639 conditions per place. [2024-01-27 15:46:22,074 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 148 selfloop transitions, 22 changer transitions 0/174 dead transitions. [2024-01-27 15:46:22,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 174 transitions, 1355 flow [2024-01-27 15:46:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:46:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:46:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 191 transitions. [2024-01-27 15:46:22,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197802197802198 [2024-01-27 15:46:22,076 INFO L175 Difference]: Start difference. First operand has 132 places, 44 transitions, 253 flow. Second operand 13 states and 191 transitions. [2024-01-27 15:46:22,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 174 transitions, 1355 flow [2024-01-27 15:46:22,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 174 transitions, 1195 flow, removed 56 selfloop flow, removed 19 redundant places. [2024-01-27 15:46:22,093 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 349 flow [2024-01-27 15:46:22,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=349, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-01-27 15:46:22,093 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2024-01-27 15:46:22,093 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 349 flow [2024-01-27 15:46:22,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 15:46:22,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:22,094 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:22,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:22,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:46:22,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:22,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:22,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1701156466, now seen corresponding path program 10 times [2024-01-27 15:46:22,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:22,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914342167] [2024-01-27 15:46:22,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:22,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:46:22,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914342167] [2024-01-27 15:46:22,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914342167] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:22,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438252667] [2024-01-27 15:46:22,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:46:22,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:22,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:22,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:46:22,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:46:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:22,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:22,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:22,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:22,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438252667] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:22,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:22,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-01-27 15:46:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568300825] [2024-01-27 15:46:22,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:46:22,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:46:22,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:46:22,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-27 15:46:22,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 349 flow. Second operand has 17 states, 17 states have (on average 7.588235294117647) internal successors, (129), 17 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 15:46:22,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:22,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-27 15:46:22,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:23,961 INFO L124 PetriNetUnfolderBase]: 7167/10271 cut-off events. [2024-01-27 15:46:23,961 INFO L125 PetriNetUnfolderBase]: For 18128/18128 co-relation queries the response was YES. [2024-01-27 15:46:23,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37638 conditions, 10271 events. 7167/10271 cut-off events. For 18128/18128 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 50614 event pairs, 189 based on Foata normal form. 24/10295 useless extension candidates. Maximal degree in co-relation 37616. Up to 3809 conditions per place. [2024-01-27 15:46:24,024 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 313 selfloop transitions, 179 changer transitions 0/493 dead transitions. [2024-01-27 15:46:24,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 493 transitions, 3820 flow [2024-01-27 15:46:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-27 15:46:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-27 15:46:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 492 transitions. [2024-01-27 15:46:24,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699248120300752 [2024-01-27 15:46:24,028 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 349 flow. Second operand 38 states and 492 transitions. [2024-01-27 15:46:24,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 493 transitions, 3820 flow [2024-01-27 15:46:24,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 493 transitions, 3807 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-01-27 15:46:24,064 INFO L231 Difference]: Finished difference. Result has 124 places, 223 transitions, 2153 flow [2024-01-27 15:46:24,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2153, PETRI_PLACES=124, PETRI_TRANSITIONS=223} [2024-01-27 15:46:24,065 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 87 predicate places. [2024-01-27 15:46:24,065 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 223 transitions, 2153 flow [2024-01-27 15:46:24,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.588235294117647) internal successors, (129), 17 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 15:46:24,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:24,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:24,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:24,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:46:24,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:24,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 393901252, now seen corresponding path program 11 times [2024-01-27 15:46:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122279650] [2024-01-27 15:46:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:24,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122279650] [2024-01-27 15:46:24,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122279650] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675544005] [2024-01-27 15:46:24,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:46:24,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:24,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:24,352 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:24,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:46:24,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:46:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:24,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:24,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:24,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675544005] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:24,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2024-01-27 15:46:24,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685591024] [2024-01-27 15:46:24,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:24,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:46:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:24,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:46:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:46:24,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-27 15:46:24,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 223 transitions, 2153 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 15:46:24,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:24,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-27 15:46:24,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:26,804 INFO L124 PetriNetUnfolderBase]: 11178/15950 cut-off events. [2024-01-27 15:46:26,804 INFO L125 PetriNetUnfolderBase]: For 71860/71860 co-relation queries the response was YES. [2024-01-27 15:46:26,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72589 conditions, 15950 events. 11178/15950 cut-off events. For 71860/71860 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 84423 event pairs, 714 based on Foata normal form. 26/15976 useless extension candidates. Maximal degree in co-relation 72549. Up to 6495 conditions per place. [2024-01-27 15:46:26,954 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 361 selfloop transitions, 477 changer transitions 0/839 dead transitions. [2024-01-27 15:46:26,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 839 transitions, 8581 flow [2024-01-27 15:46:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:46:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:46:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 595 transitions. [2024-01-27 15:46:26,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-01-27 15:46:26,957 INFO L175 Difference]: Start difference. First operand has 124 places, 223 transitions, 2153 flow. Second operand 44 states and 595 transitions. [2024-01-27 15:46:26,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 839 transitions, 8581 flow [2024-01-27 15:46:27,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 839 transitions, 8370 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-01-27 15:46:27,434 INFO L231 Difference]: Finished difference. Result has 180 places, 544 transitions, 6793 flow [2024-01-27 15:46:27,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=6793, PETRI_PLACES=180, PETRI_TRANSITIONS=544} [2024-01-27 15:46:27,435 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 143 predicate places. [2024-01-27 15:46:27,435 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 544 transitions, 6793 flow [2024-01-27 15:46:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 15:46:27,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:27,435 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:27,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:27,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:46:27,639 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:27,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1840750810, now seen corresponding path program 12 times [2024-01-27 15:46:27,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:27,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995171615] [2024-01-27 15:46:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:27,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:27,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995171615] [2024-01-27 15:46:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995171615] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920569630] [2024-01-27 15:46:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:46:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:27,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:27,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:46:27,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:46:27,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:27,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:27,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:27,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920569630] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:27,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-01-27 15:46:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783694821] [2024-01-27 15:46:27,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:46:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:46:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:46:27,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-27 15:46:27,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 544 transitions, 6793 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:27,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:27,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-27 15:46:27,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:33,340 INFO L124 PetriNetUnfolderBase]: 16832/23800 cut-off events. [2024-01-27 15:46:33,340 INFO L125 PetriNetUnfolderBase]: For 156419/156419 co-relation queries the response was YES. [2024-01-27 15:46:33,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124588 conditions, 23800 events. 16832/23800 cut-off events. For 156419/156419 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 130379 event pairs, 543 based on Foata normal form. 26/23826 useless extension candidates. Maximal degree in co-relation 124530. Up to 9627 conditions per place. [2024-01-27 15:46:33,657 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 797 selfloop transitions, 746 changer transitions 0/1544 dead transitions. [2024-01-27 15:46:33,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1544 transitions, 17932 flow [2024-01-27 15:46:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-01-27 15:46:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-01-27 15:46:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1368 transitions. [2024-01-27 15:46:33,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386987270155587 [2024-01-27 15:46:33,660 INFO L175 Difference]: Start difference. First operand has 180 places, 544 transitions, 6793 flow. Second operand 101 states and 1368 transitions. [2024-01-27 15:46:33,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1544 transitions, 17932 flow [2024-01-27 15:46:35,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1544 transitions, 17085 flow, removed 255 selfloop flow, removed 6 redundant places. [2024-01-27 15:46:35,277 INFO L231 Difference]: Finished difference. Result has 310 places, 897 transitions, 13128 flow [2024-01-27 15:46:35,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=13128, PETRI_PLACES=310, PETRI_TRANSITIONS=897} [2024-01-27 15:46:35,278 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 273 predicate places. [2024-01-27 15:46:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 897 transitions, 13128 flow [2024-01-27 15:46:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:35,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:35,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:35,484 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:35,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1650161992, now seen corresponding path program 13 times [2024-01-27 15:46:35,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:35,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142095873] [2024-01-27 15:46:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:35,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:35,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142095873] [2024-01-27 15:46:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142095873] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734314635] [2024-01-27 15:46:35,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:46:35,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:35,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:35,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:46:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:35,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:46:35,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:35,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734314635] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:35,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:35,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-27 15:46:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068121806] [2024-01-27 15:46:35,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:35,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-27 15:46:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-27 15:46:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2024-01-27 15:46:35,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:46:35,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 897 transitions, 13128 flow. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:35,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:35,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:46:35,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:40,207 INFO L124 PetriNetUnfolderBase]: 13882/19810 cut-off events. [2024-01-27 15:46:40,208 INFO L125 PetriNetUnfolderBase]: For 150789/150789 co-relation queries the response was YES. [2024-01-27 15:46:40,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114410 conditions, 19810 events. 13882/19810 cut-off events. For 150789/150789 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 115794 event pairs, 1159 based on Foata normal form. 20/19822 useless extension candidates. Maximal degree in co-relation 114316. Up to 9035 conditions per place. [2024-01-27 15:46:40,435 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 659 selfloop transitions, 605 changer transitions 0/1268 dead transitions. [2024-01-27 15:46:40,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1268 transitions, 19259 flow [2024-01-27 15:46:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:46:40,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:46:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 434 transitions. [2024-01-27 15:46:40,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-01-27 15:46:40,437 INFO L175 Difference]: Start difference. First operand has 310 places, 897 transitions, 13128 flow. Second operand 27 states and 434 transitions. [2024-01-27 15:46:40,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1268 transitions, 19259 flow [2024-01-27 15:46:42,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1268 transitions, 17323 flow, removed 538 selfloop flow, removed 16 redundant places. [2024-01-27 15:46:42,778 INFO L231 Difference]: Finished difference. Result has 327 places, 1012 transitions, 14839 flow [2024-01-27 15:46:42,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14839, PETRI_PLACES=327, PETRI_TRANSITIONS=1012} [2024-01-27 15:46:42,779 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 290 predicate places. [2024-01-27 15:46:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1012 transitions, 14839 flow [2024-01-27 15:46:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 20 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:42,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:46:42,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:46:42,980 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:42,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2099187140, now seen corresponding path program 14 times [2024-01-27 15:46:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:42,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700423919] [2024-01-27 15:46:42,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700423919] [2024-01-27 15:46:43,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700423919] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:43,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723672367] [2024-01-27 15:46:43,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:46:43,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:43,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:43,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:43,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:46:43,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:46:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:43,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:46:43,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:43,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723672367] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:43,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:43,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-01-27 15:46:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167649675] [2024-01-27 15:46:43,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-27 15:46:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-27 15:46:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2024-01-27 15:46:43,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:46:43,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1012 transitions, 14839 flow. Second operand has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:43,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:43,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:46:43,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:47,855 INFO L124 PetriNetUnfolderBase]: 15296/21821 cut-off events. [2024-01-27 15:46:47,855 INFO L125 PetriNetUnfolderBase]: For 162714/162714 co-relation queries the response was YES. [2024-01-27 15:46:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124269 conditions, 21821 events. 15296/21821 cut-off events. For 162714/162714 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 129312 event pairs, 1981 based on Foata normal form. 18/21823 useless extension candidates. Maximal degree in co-relation 124180. Up to 10071 conditions per place. [2024-01-27 15:46:48,082 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 728 selfloop transitions, 538 changer transitions 0/1270 dead transitions. [2024-01-27 15:46:48,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1270 transitions, 19788 flow [2024-01-27 15:46:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:46:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:46:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 295 transitions. [2024-01-27 15:46:48,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44360902255639095 [2024-01-27 15:46:48,083 INFO L175 Difference]: Start difference. First operand has 327 places, 1012 transitions, 14839 flow. Second operand 19 states and 295 transitions. [2024-01-27 15:46:48,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1270 transitions, 19788 flow [2024-01-27 15:46:49,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1270 transitions, 19177 flow, removed 77 selfloop flow, removed 15 redundant places. [2024-01-27 15:46:49,983 INFO L231 Difference]: Finished difference. Result has 335 places, 1084 transitions, 17051 flow [2024-01-27 15:46:49,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14228, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=17051, PETRI_PLACES=335, PETRI_TRANSITIONS=1084} [2024-01-27 15:46:49,984 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 298 predicate places. [2024-01-27 15:46:49,984 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1084 transitions, 17051 flow [2024-01-27 15:46:49,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.238095238095238) internal successors, (152), 21 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:46:49,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:49,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:49,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:50,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:50,195 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:50,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 325117118, now seen corresponding path program 15 times [2024-01-27 15:46:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542988697] [2024-01-27 15:46:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:50,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542988697] [2024-01-27 15:46:50,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542988697] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:50,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598173650] [2024-01-27 15:46:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:46:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:50,292 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:50,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:46:50,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:46:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:50,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:46:50,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:50,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:50,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598173650] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:50,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:50,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-27 15:46:50,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263687615] [2024-01-27 15:46:50,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:50,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:46:50,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:46:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:46:50,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-01-27 15:46:50,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1084 transitions, 17051 flow. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 15:46:50,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:50,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-01-27 15:46:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:46:55,420 INFO L124 PetriNetUnfolderBase]: 15444/21995 cut-off events. [2024-01-27 15:46:55,420 INFO L125 PetriNetUnfolderBase]: For 204708/204708 co-relation queries the response was YES. [2024-01-27 15:46:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130355 conditions, 21995 events. 15444/21995 cut-off events. For 204708/204708 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 129607 event pairs, 1987 based on Foata normal form. 20/22009 useless extension candidates. Maximal degree in co-relation 130268. Up to 10221 conditions per place. [2024-01-27 15:46:55,653 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 696 selfloop transitions, 529 changer transitions 0/1229 dead transitions. [2024-01-27 15:46:55,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1229 transitions, 20416 flow [2024-01-27 15:46:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-27 15:46:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-27 15:46:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 257 transitions. [2024-01-27 15:46:55,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4319327731092437 [2024-01-27 15:46:55,655 INFO L175 Difference]: Start difference. First operand has 335 places, 1084 transitions, 17051 flow. Second operand 17 states and 257 transitions. [2024-01-27 15:46:55,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1229 transitions, 20416 flow [2024-01-27 15:46:58,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1229 transitions, 20238 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-01-27 15:46:58,209 INFO L231 Difference]: Finished difference. Result has 345 places, 1090 transitions, 18102 flow [2024-01-27 15:46:58,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=16897, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18102, PETRI_PLACES=345, PETRI_TRANSITIONS=1090} [2024-01-27 15:46:58,210 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 308 predicate places. [2024-01-27 15:46:58,210 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1090 transitions, 18102 flow [2024-01-27 15:46:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 19 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 15:46:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:58,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:46:58,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:58,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:58,411 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:46:58,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1854652870, now seen corresponding path program 16 times [2024-01-27 15:46:58,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:58,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632296727] [2024-01-27 15:46:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:58,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:46:58,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632296727] [2024-01-27 15:46:58,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632296727] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:58,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220077861] [2024-01-27 15:46:58,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:46:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:58,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:58,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:46:58,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:46:58,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:58,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:46:58,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:58,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:46:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220077861] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:58,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-01-27 15:46:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791512000] [2024-01-27 15:46:58,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:46:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:46:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:46:58,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-27 15:46:58,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1090 transitions, 18102 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 15:46:58,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:58,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-27 15:46:58,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:09,311 INFO L124 PetriNetUnfolderBase]: 32577/45915 cut-off events. [2024-01-27 15:47:09,311 INFO L125 PetriNetUnfolderBase]: For 475002/475002 co-relation queries the response was YES. [2024-01-27 15:47:09,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275996 conditions, 45915 events. 32577/45915 cut-off events. For 475002/475002 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 274740 event pairs, 2865 based on Foata normal form. 24/45939 useless extension candidates. Maximal degree in co-relation 275910. Up to 19291 conditions per place. [2024-01-27 15:47:10,267 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 801 selfloop transitions, 1229 changer transitions 0/2031 dead transitions. [2024-01-27 15:47:10,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2031 transitions, 33243 flow [2024-01-27 15:47:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-01-27 15:47:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-01-27 15:47:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 918 transitions. [2024-01-27 15:47:10,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-01-27 15:47:10,269 INFO L175 Difference]: Start difference. First operand has 345 places, 1090 transitions, 18102 flow. Second operand 68 states and 918 transitions. [2024-01-27 15:47:10,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2031 transitions, 33243 flow [2024-01-27 15:47:17,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2031 transitions, 32713 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:47:17,889 INFO L231 Difference]: Finished difference. Result has 434 places, 1579 transitions, 30062 flow [2024-01-27 15:47:17,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=17731, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=30062, PETRI_PLACES=434, PETRI_TRANSITIONS=1579} [2024-01-27 15:47:17,891 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 397 predicate places. [2024-01-27 15:47:17,891 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1579 transitions, 30062 flow [2024-01-27 15:47:17,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 15:47:17,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:17,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:17,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-27 15:47:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:18,102 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 15:47:18,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash 246625776, now seen corresponding path program 17 times [2024-01-27 15:47:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537740589] [2024-01-27 15:47:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:18,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-27 15:47:18,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:18,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537740589] [2024-01-27 15:47:18,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537740589] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:18,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145995547] [2024-01-27 15:47:18,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:47:18,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:18,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:18,199 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:47:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:47:18,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:47:18,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:18,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:47:18,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:18,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:47:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145995547] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:18,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:18,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-01-27 15:47:18,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671521564] [2024-01-27 15:47:18,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:18,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-27 15:47:18,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-27 15:47:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-01-27 15:47:18,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 35 [2024-01-27 15:47:18,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1579 transitions, 30062 flow. Second operand has 19 states, 19 states have (on average 6.684210526315789) internal successors, (127), 19 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 15:47:18,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:18,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 35 [2024-01-27 15:47:18,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand